Browsing by Author "Vogelaar, R. Bruce"
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- Annual Modulation Measurement of the Low Energy Solar Neutrino Flux with the Borexino DetectorManecki, Szymon M. (Virginia Tech, 2013-06-20)This work reports a first attempt to measure the solar neutrino annual
flux modulation due to Earth\'s elliptical orbit with the Borexino detector. Borexino is a real-time calorimetric detector for low energy neutrino spectroscopy located in the underground laboratory of Gran Sasso, Italy. The experiment\'s main focus is the direct measurement of the 7Be solar neutrino flux of all flavors via neutrino-electron scattering in an ultra-pure scintillation liquid. The original goal of this work was to quantify sensitivity of the Borexino detector to a 7% peak-to-peak signal variation over the course of a year and study background stability. A Monte-Carlo simulated sample of the expected variation was prepared in two phases of data acquisition, Phase I that spans from May-2007 to May-2010 and Phase II from October-2011 to September-2012. The data was then fitted in the time domain with a sinusoidal function and analyzed with the Lomb-Scargle fast Fourier transformation in the search for significant periodicities between periods of 0.5 and 1.5 years. The search was performed in the energy window dominated by 7Be, [210; 760] keV, and 60-day bins in the case of the fit and 10-bins for the Lomb-Scargle scan. This work also contains study of the post-purification data of Phase II beyond September-2012 with a prediction for the future sensitivity and justification of the achieved background levels. - Applied Antineutrino Physics 2015 -- Conference SummaryBowden, N. S.; Heeger, K. M.; Huber, Patrick; Mariani, Camillo; Vogelaar, R. Bruce (2016-02)This is a brief summary of the 11th Applied Antineutrino Physics 2015 workshop held at the Virginia Tech Arlington Research Facility from December 7-8, 2015.
- Borexino’s search for low-energy neutrinos associated with gravitational wave events from GWTC-3 databaseBasilico, D.; Bellini, G.; Benziger, J.; Biondi, R.; Caccianiga, B.; Calaprice, F.; Caminata, A.; Chepurnov, A.; D’Angelo, D.; Derbin, A.; Di Giacinto, A.; Di Marcello, V.; Ding, X. F.; Di Ludovico, A.; Di Noto, L.; Drachnev, I.; Franco, D.; Galbiati, C.; Ghiano, C.; Giammarchi, M.; Goretti, A.; Gromov, M.; Guffanti, D.; Ianni, Aldo; Ianni, Andrea; Jany, A.; Kobychev, V.; Korga, G.; Kumaran, S.; Laubenstein, M.; Litvinovich, E.; Lombardi, P.; Lomskaya, I.; Ludhova, L.; Machulin, I.; Martyn, J.; Meroni, E.; Miramonti, L.; Misiaszek, M.; Muratova, V.; Nugmanov, R.; Oberauer, L.; Orekhov, V.; Ortica, F.; Pallavicini, M.; Pelicci, L.; Penek, Ö.; Pietrofaccia, L.; Pilipenko, N.; Pocar, A.; Raikov, G.; Ranalli, M. T.; Ranucci, G.; Re, A.; Rossi, N.; Schönert, S.; Semenov, D.; Settanta, G.; Skorokhvatov, M.; Singhal, A.; Smirnov, O.; Sotnikov, A.; Tartaglia, R.; Testera, G.; Unzhakov, E.; Vishneva, A.; Vogelaar, R. Bruce; von Feilitzsch, F.; Wojcik, M.; Wurm, M.; Zavatarelli, S.; Zuber, K.; Zuzel, G. (2023-06-26)The search for neutrino events in correlation with gravitational wave (GW) events for three observing runs (O1, O2 and O3) from 09/2015 to 03/2020 has been performed using the Borexino data-set of the same period. We have searched for signals of neutrino-electron scattering and inverse beta-decay (IBD) within a time window of ±1000 s centered at the detection moment of a particular GW event. The search was done with three visible energy thresholds of 0.25, 0.8 and 3.0 MeV. Two types of incoming neutrino spectra were considered: the mono-energetic line and the supernova-like spectrum. GW candidates originated by merging binaries of black holes (BHBH), neutron stars (NSNS) and neutron star and black hole (NSBH) were analyzed separately. Additionally, the subset of most intensive BHBH mergers at closer distances and with larger radiative mass than the rest was considered. In total, follow-ups of 74 out of 93 gravitational waves reported in the GWTC-3 catalog were analyzed and no statistically significant excess over the background was observed. As a result, the strongest upper limits on GW-associated neutrino and antineutrino fluences for all flavors (𝜈𝑒,𝜈𝜇,𝜈𝜏) at the level 109−1015 cm−2GW−1 have been obtained in the 0.5–5 MeV neutrino energy range.
- CALIS - A CALibration Insertion System for the DarkSide-50 dark matter search experimentAgnes, P.; Albuquerque, I. F. M.; Alexander, T.; Alton, A. K.; Asner, D. M.; Back, H. O.; Baldin, B.; Biery, K.; Bocci, V.; Bonfini, G.; Bonivento, W.; Bossa, M.; Bottino, B.; Brigatti, A.; Brodsky, J.; Budano, F.; Bussino, S.; Cadeddu, M.; Cadonati, L.; Cadoni, M.; Calaprice, F.; Canci, N.; Candela, A.; Caravati, M.; Cariello, M.; Carlini, M.; Catalanotti, S.; Cavalcante, P.; Chepurnov, A.; Cicalo, C.; Cocco, A. G.; Covone, G.; D'Angelo, D.; D'Incecco, M.; Davini, S.; De Cecco, S.; De Deo, M.; De Vincenzi, M.; Derbin, A. V.; Devoto, A.; Di Eusanio, F.; Di Pietro, G.; Dionisi, C.; Edkins, E.; Empl, A.; Fan, A.; Fiorillo, G.; Fomenko, K.; Forster, G.; Franco, D.; Gabriele, Federico; Galbiati, C.; Giagu, S.; Giganti, C.; Giovanetti, G. K.; Goretti, A. M.; Granato, F.; Grandi, L.; Gromov, M.; Guan, M.; Guardincerri, Y.; Hackett, B. R.; Herner, K.; Hughes, D.; Humble, P.; Hungerford, Ed V.; Ianni, A.; Ianni, A.; James, I.; Johnson, T. N.; Jollet, C.; Keeter, K.; Kendziora, C. L.; Koh, G.; Korablev, D.; Korga, G.; Kubankin, A.; Li, X.; Lissia, M.; Loer, B.; Lombardi, Paolo; Longo, G.; Ma, Y.; Machado, A. A.; Machulin, I. N.; Mandarano, A.; Mari, S. M.; Maricic, Jelena; Marini, L.; Martoff, C. J.; Meregaglia, A.; Meyers, P. D.; Milincic, R.; Miller, J. D.; Montanari, D.; Monte, A.; Mount, B. J.; Muratova, V. N.; Musico, P.; Napolitano, J.; Agasson, A. Navrer; Odrowski, S.; Orsini, M.; Ortica, F.; Pagani, L.; Pallavicini, M.; Pantic, E.; Parmeggiano, S.; Pelczar, K.; Pelliccia, N.; Pocar, A.; Pordes, S.; Pugachev, D. A.; Qian, H.; Randle, K.; Ranucci, G.; Razeti, M.; Razeto, A.; Reinhold, B.; Renshaw, A. L.; Rescigno, M.; Riffard, Q.; Romani, A.; Rossi, B.; Rossi, Nicola; Rountree, D.; Sablone, D.; Saggese, P.; Saldanha, R.; Sands, W.; Savarese, C.; Schlitzer, B.; Segreto, E.; Semenov, D. A.; Shields, E.; Singh, P. N.; Skorokhvatov, Mikhail D.; Smirnov, O. Y.; Sotnikov, A.; Stanford, C.; Suvorov, Yura; Tartaglia, R.; Tatarowicz, J.; Testera, G.; Tonazzo, A.; Trinchese, P.; Unzhakov, E. V.; Verducci, M.; Vishneva, A.; Vogelaar, R. Bruce; Wada, M.; Walker, S.; Wang, H.; Wang, Y.; Watson, A. W.; Westerdale, S.; Wilhelmi, J.; Wojcik, M. M.; Xiang, Xi.; Xiao, X.; Xu, J.; Yang, C.; Zec, A.; Zhong, W.; Zhu, C.; Zuzel, G. (2017-12)This paper describes the design, fabrication, commissioning and use of a CALibration source Insertion System (CALIS) in the DarkSide-50 direct dark matter search experiment. CALIS deploys radioactive sources into the liquid scintillator veto to characterize the detector response and detection efficiency of the DarkSide-50 Liquid Argon Time Projection Chamber, and the surrounding 30 t organic liquid scintillator neutron veto. It was commissioned in September 2014 and has been used successfully in several gamma and neutron source campaigns since then. A description of the hardware and an excerpt of calibration analysis results are given below.
- Charged Pion Photoproduction Cross Section and Beam Asymmetry Measurement on HDMeyer, Holger (Virginia Tech, 2002-08-08)The charged pion production reactions d(gamma,pi+n), d(gamma,pi-p), HD(gamma,pi+n)X were studied using linearly polarized gamma-rays with energies in the range from 260 MeV to 370 MeV at the Laser Electron Gamma Source (LEGS). A solid HD target was used in this experiment for the first time. The beam asymmetry data for the d(gamma,pi-p) reaction significantly add to the previously available data. This gives new input to multipole analysis of pion production. A slight deviation from the beam asymmetry predicted for the free neutron is observed. The cross sections in the d(gamma,pi-p) channel agree with previous measurements.
- Constraints on flavor-diagonal non-standard neutrino interactions from Borexino Phase-IIAgarwalla, S. K.; Agostini, Matteo; Altenmueller, Konrad; Appel, S.; Atroshchenko, Victor; Bagdasarian, Zara; Basilico, D.; Bellini, G.; Benziger, Jay; Bick, D.; Bonfini, G.; Bravo, D.; Caccianiga, B.; Calaprice, F.; Caminata, A.; Cappelli, L.; Cavalcante, P.; Cavanna, F.; Chepurnov, A.; Choi, K.; D'Angelo, D.; Davini, S.; Derbin, A. V.; Di Giacinto, A.; Di Marcello, V.; Ding, X. F.; Di Ludovico, Antonio; Di Noto, Lea; Drachnev, I.; Fomenko, K.; Formozov, A.; Franco, D.; Gabriele, Federico; Galbiati, C.; Gschwender, M.; Ghiano, C.; Giammarchi, Marco; Goretti, A.; Gromov, M.; Guffanti, D.; Hagner, C.; Hungerford, Ed V.; Ianni, Aldo; Ianni, Andrea; Jany, A.; Jeschke, D.; Kumaran, S.; Kobychev, V.; Korga, G.; Lachenmaier, Tobias; Laubenstein, Matthias; Litvinovich, E.; Lombardi, Paolo; Ludhova, L.; Lukyanchenko, G.; Lukyanchenko, L.; Machulin, I. N.; Manuzio; Marcocci, S.; Maricic, Jelena; Martyn, J.; Meroni, E.; Meyer, M.; Miramonti, L.; Misiaszek, M.; Muratova, V. N.; Neumair, B.; Nieslony, M.; Oberauer, L.; Orekhov, V.; Ortica, F.; Pallavicini, M.; Papp, L.; Penek, O.; Pietrofaccia, L.; Pilipenko, N.; Pocar, A.; Raikov, G.; Ranucci, G.; Razeto, A.; Re, A.; Redchuk, M.; Romani, A.; Rossi, Nicola; Rottenanger, Sebastian; Schoenert, S.; Semenov, D. A.; Skorokhvatov, Mikhail D.; Smirnov, O. Y.; Sotnikov, A.; Sun, C.; Suvorov, Yura; Takeuchi, Tatsu; Tartaglia, R.; Testera, G.; Thurn, J.; Unzhakov, E. V.; Vishneva, A.; Vogelaar, R. Bruce; von Feilitzsch, F.; Wojcik, M. M.; Wurm, M.; Zaimidoroga, O.; Zavatarelli, S.; Zuber, Kai; Zuzel, G. (2020-02-05)The Borexino detector measures solar neutrino fluxes via neutrino-electron elastic scattering. Observed spectra are determined by the solar-nu(e) survival probability P-ee(E), and the chiral couplings of the neutrino and electron. Some theories of physics beyond the Standard Model postulate the existence of Non-Standard Interactions (NSI's) which modify the chiral couplings and P-ee(E). In this paper, we search for such NSI's, in particular, flavor-diagonal neutral current interactions that modify the nu(e)e and nu(tau)e couplings using Borexino Phase II data. Standard Solar Model predictions of the solar neutrino fluxes for both high- and low-metallicity assumptions are considered. No indication of new physics is found at the level of sensitivity of the detector and constraints on the parameters of the NSI's are placed. In addition, with the same dataset the value of sin(2)theta(W) is obtained with a precision comparable to that achieved in reactor antineutrino experiments .
- The DarkSide Multiton Detector for the Direct Dark Matter SearchAalseth, C. E.; Agnes, P.; Alton, A. K.; Arisaka, K.; Asner, D. M.; Back, H. O.; Baldin, B.; Biery, K.; Bonfini, G.; Bossa, M.; Brigatti, A.; Brodsky, J.; Budano, F.; Cadonati, L.; Cadoni, M.; Calaprice, F.; Canci, N.; Candela, A.; Cao, H.; Cariello, M.; Cavalcante, P.; Chepurnov, A.; Cocco, A. G.; Condon, C.; Crippa, L.; D'Angelo, D.; D'Incecco, M.; Davini, S.; De Deo, M.; Derbin, A. V.; Devoto, A.; Di Eusanio, F.; Edkins, E.; Empl, A.; Fan, A.; Fiorillo, G.; Fomenko, K.; Forster, G.; Foxe, M.; Franco, D.; Gabriele, Federico; Galbiati, C.; Goretti, A.; Grandi, L.; Gromov, M.; Guan, M. Y.; Guardincerri, Y.; Hackett, B.; Herner, K.; Hime, A.; Humble, P.; Hungerford, Ed V.; Ianni, A.; Ianni, A.; Jaffe, D. E.; Jollet, C.; Keeter, K.; Kendziora, C. L.; Kidner, S.; Kobychev, V.; Koh, G.; Korablev, D.; Korga, G.; Kurlej, A.; Li, P. X.; Lissia, M.; Lombardi, Paolo; Ludhova, L.; Luitz, S.; Lukyachenko, G.; Ma, Y. Q.; Machulin, I. N.; Mandarano, A.; Mari, S. M.; Maricic, Jelena; Marini, L.; Markov, D.; Martoff, J.; Meregaglia, A.; Meroni, E.; Meyers, P. D.; Miletic, T.; Milincic, R.; Montuschi, M.; Monzani, M. E.; Mosteiro, P.; Mount, B.; Muratova, V. N.; Musico, P.; Montanari, D.; Nelson, A.; Odrowski, S.; Odrzywolek, A.; Orrell, J. L.; Orsini, M.; Ortica, F.; Pagani, L.; Pallavicini, M.; Pantic, E.; Parmeggiano, S.; Parsells, B.; Pelczar, K.; Pelliccia, N.; Perasso, S.; Perasso, L.; Pocar, A.; Pordes, S.; Pugachev, D. A.; Qian, H.; Randle, K.; Ranucci, G.; Razeto, A.; Recine, K.; Reinhold, B.; Renshaw, A. L.; Romani, A.; Rossi, Nicola; Rossi, B.; Rountree, S. D.; Sablone, D.; Saggese, P.; Saldanha, R.; Sands, W.; Sangiorgio, S.; Segreto, E.; Semenov, D. A.; Shields, E.; Skorokhvatov, Mikhail D.; Smallcomb, M.; Smirnov, O. Y.; Sotnikov, A.; Suvurov, Y.; Tartaglia, R.; Tatarowicz, J.; Testera, G.; Tonazzo, A.; Unzhakov, E. V.; Vogelaar, R. Bruce; Wada, M.; Walker, S. E.; Wang, H.; Wang, Y.; Watson, A. W.; Westerdale, S.; Williams, R.; Wojcik, M. M.; Xu, J.; Yang, C. G.; Yoo, J.; Yu, B.; Zavatarelli, S.; Zhong, W. L.; Zuzel, G. (Hindawi, 2015-01-20)Although the existence of dark matter is supported by many evidences, based on astrophysical measurements, its nature is still completely unknown. One major candidate is represented by weakly interacting massive particles (WIMPs), which could in principle be detected through their collisions with ordinary nuclei in a sensitive target, producing observable low-energy (ud_less_than100 keV) nuclear recoils. The DarkSide program aims at the WIPMs detection using a liquid argon time projection chamber (LAr-TPC). In this paper we quickly review the DarkSide program focusing in particular on the next generation experiment DarkSide-G2, a 3.6-ton LAr-TPC. The different detector components are described as well as the improvements needed to scale the detector from DarkSide-50 (50 kg LAr-TPC) up to DarkSide-G2. Finally, the preliminary results on background suppression and expected sensitivity are presented.
- Determination of the Axial-Vector Weak Coupling Constant with Ultracold NeutronsLiu, J.; Mendenhall, M. P.; Holley, A. T.; Back, H. O.; Bowles, T. J.; Broussard, L. J.; Carr, Rachel E.; Clayton, S.; Currie, S.; Filippone, B. W.; Garcia, A.; Geltenbort, P.; Hickerson, K. P.; Hoagland, J.; Hogan, G. E.; Hona, B.; Ito, T. M.; Liu, C. Y.; Makela, M.; Mammei, R. R.; Martin, J. W.; Melconian, D.; Morris, C. L.; Pattie, R. W.; Galvan, A. P.; Pitt, M. L.; Plaster, B.; Ramsey, J. C.; Rios, R.; Russell, R.; Saunders, A.; Seestrom, S. J.; Sondheim, W. E.; Tatar, E.; Vogelaar, R. Bruce; VornDick, B.; Wrede, C.; Yan, H.; Young, A. R.; Ucna Collaboration (American Physical Society, 2010-10-29)A precise measurement of the neutron decay beta asymmetry A(0) has been carried out using polarized ultracold neutrons from the pulsed spallation ultracold neutron source at the Los Alamos Neutron Science Center. Combining data obtained in 2008 and 2009, we report A(0) = -0.119 66 +/- 0.000 89(-0.001 40)(+0.001 23), from which we determine the ratio of the axial- vector to vector weak coupling of the nucleon gA/gV = -1.275 90(-0.004 45)(+0.004 09).
- Development and benchmarking of advanced FM-based particle transport algorithms for steady-state and transient conditions, implementation in RAPID and its VRS web-applicationMascolino, Valerio (Virginia Tech, 2021-06-14)There is a significant need for 3-D steady-state and transient neutron transport formulations and codes that yield accurate, high-fidelity solutions with reasonable computing resources and time. These tools are essential for modeling innovative nuclear systems, such as next-generation reactor designs. The existing methods generally compromise heavily between accuracy and affordability in terms of computation times. In this dissertation, novel algorithms for simulation of reactor transient conditions have been developed and implemented into the RAPID code system. In addition, extensive computational verification and experimental validation of RAPID's steady-state and transient algorithms was performed, and a novel virtual reality system (VRS) web-application was developed for the RAPID code system. The new algorithms, collectively referred to as tRAPID, are based on the Transient Fission Matrix (TFM) methodology. By decoupling the kinetic neutron transport problem into two different stages (an accurate pre-calculation to generate a database and an on-line solution of linear partial differential equations) the method ensures the preservation of the highest level of accuracy while also allowing for high-fidelity modeling and simulation of nuclear reactor kinetics in a short time with minimal computing resources. The tRAPID algorithms have been computationally verified using several computational benchmarks and experimentally validated using the JSI TRIGA Mark-II reactor. In order to develop these algorithms, first the steady-state capabilities of RAPID have been successfully benchmarked against the GBC-32 spent fuel cask system, also highlighting issues with the standard eigenvalue Monte Carlo calculations that our code is capable of overcoming. A novel methodology for accounting for the movement of control rods in the JSI TRIGA reactor has been developed. This methodology, referred to as FM-CRd, is capable of determining the neutron flux distribution changes due to the presence of control rod in real-time. The FM-CRd method has been validated with successfully using the JSI TRIGA reactor. The time-dependent, kinetic capabilities of the new tRAPID algorithm have been implemented based on the Transient Fission Matrix (TFM) method. tRAPID has been verified and validated using the Flattop-Pu benchmark and reference calculations and measurements using the JSI TRIGA reactor. In addition to the main tRAPID algorithms development and benchmarking efforts, a new web-application for the RAPID Code System for input preparation and interactive output visualization was developed. VRS-RAPID greatly enhances the usability, intuitiveness, and outreach possibilities of the RAPID Code System.
- Development and calibration of NuLat, A new type of neutrino detectorDing, Xinjian (Virginia Tech, 2018-04-27)Over the past 20 years, the detection of neutrino oscillation has reported a lot of important results. The oscillation phenomenon itself has been well proved by various experiments. Some oscillation parameters has been measured and now in the area of precise determination. On the other hand, some new questions like the possibility of the existence of light sterile neutrinos and unexpected 5 MeV bump were raised during the measurement. The Neutrino Lattice Experiment (NuLat) is a detector based on the Raghavan Optical Lattice (ROL). It should be able to offer a compact design of an effective detector with good mobility. It can be extremely useful in the short baseline reactor neutrino oscillation detection community to resolve several confusing issues. In this thesis, we present the calibration results we got from the first active NuLat detector and show what kind of improvements we need for the next version of the NuLat detector based on these results.
- Feasibility Study of a Natural Uranium Neutron Spallation Target using FLiBe as a CoolantBoulanger, Andrew James (Virginia Tech, 2011-05-10)The research conducted was a feasibility study using Lithium Fluoride-Beryllium Fluoride (LiF-BeF2) or FLiBe as a coolant with a natural uranium neutron spallation source applied to an accelerator driven sub-critical molten salt reactor. The study utilized two different software tools, MCNPX 2.6 and FLUENT 12.1. MCNPX was used to determine the neutronics and heat deposited in the spallation target structure while FLUENT was used to determine the feasibility of cooling the target structure with FLiBe. Several target structures were analyzed using a variety of plates and large cylinders of natural uranium with a proton beam incident on a Hastelloy-N window. The supporting structures were created from Hastelloy-N due to their anti-corrosive properties of molten salts such as FLiBe and their resistance to neutron damage. The final design chosen was a "Sandwich" design utilizing a section of thick plates followed by several smaller plates then finally a section of thick plates to stop any protons from irradiating the bottom of the target support structure or the containment vessel of the reactor. Utilizing a proton beam with 0.81 MW of proton beam power at 1.35 mA with proton kinetic energies of 600 MeV, the total heat generated in the spallation target was about 0.9 MW due to fissions in the natural uranium. Additionally, the neutrons produced from the final design of the spallation target were approximately 1.25x1018 neutrons per second which were mainly fast neutrons. The use of a natural uranium target proved to be very promising. However, cooling the target using FLiBe would require further optimization or investigation into alternate coolants. Specifically, the final design developed using FLiBe as a coolant was not practically feasible due to the hydraulic forces resulting from the high flow rates necessary to keep the natural uranium target structures cooled. The primary reason for the lack of a feasible solution was the FLiBe as a coolant; FLiBe is unable to pull enough heat generated in the target out of the target structure. Due to the high energy density of a natural uranium spallation target structure, a more effective method of cooling will be required to avoid high hydraulic forces, such as a liquid metal coolant like lead-bismuth eutectic.
- First Measurement of the Neutron beta Asymmetry with Ultracold NeutronsPattie, R. W.; Anaya, J.; Back, H. O.; Boissevain, J. G.; Bowles, T. J.; Broussard, L. J.; Carr, Rachel E.; Clark, D. J.; Currie, S.; Du, S.; Filippone, B. W.; Geltenbort, P.; Garcia, A.; Hawari, A.; Hickerson, K. P.; Hill, R.; Hino, M.; Hoedl, S. A.; Hogan, G. E.; Holley, A. T.; Ito, T. M.; Kawai, T.; Kirch, K.; Kitagaki, S.; Lamoreaux, S. K.; Liu, C. Y.; Liu, J.; Makela, M.; Mammei, R. R.; Martin, J. W.; Melconian, D.; Meier, N.; Mendenhall, M. P.; Morris, C. L.; Mortensen, R.; Pichlmaier, A.; Pitt, M. L.; Plaster, B.; Ramsey, J. C.; Rios, R.; Sabourov, K.; Sallaska, A. L.; Saunders, A.; Schmid, R.; Seestrom, S. J.; Servicky, C.; Sjue, S. K. L.; Smith, D.; Sondheim, W. E.; Tatar, E.; Teasdale, W.; Terai, C.; Tipton, B.; Utsuro, M.; Vogelaar, R. Bruce; Wehring, B. W.; Xu, Y. P.; Young, A. R.; Yuan, J.; Ucna Collaboration (American Physical Society, 2009-01-09)We report the first measurement of an angular correlation parameter in neutron beta decay using polarized ultracold neutrons (UCN). We utilize UCN with energies below about 200 neV, which we guide and store for similar to 30 s in a Cu decay volume. The interaction of the neutron magnetic dipole moment with a static 7 T field external to the decay volume provides a 420 neV potential energy barrier to the spin state parallel to the field, polarizing the UCN before they pass through an adiabatic fast passage spin flipper and enter a decay volume, situated within a 1 T field in a 2 x 2 pi solenoidal spectrometer. We determine a value for the beta-asymmetry parameter A(0) = -0.1138 +/- 0.0046 +/- 0.0021.
- The Intermediate Neutrino ProgramAdams, C.; Alonso, J. R.; Ankowski, Artur M.; Asaadi, J. A.; Ashenfelter, J.; Axani, S. N.; Babu, K. S.; Backhouse, C.; Band, H. R.; Barbeau, P. S.; Barros, N.; Bernstein, A.; Betancourt, M.; Bishai, M.; Blucher, E.; Bouffard, J.; Bowden, N. S.; Brice, S.; Bryan, C.; Camilleri, Leslie; Cao, J.; Carlson, J.; Carr, R. E.; Chatterjee, A.; Chen, M.; Chen, S.; Chiu, M.; Church, E. D.; Collar, J. I.; Collin, G.; Conrad, Janet M.; Convery, M. R.; Cooper, R. L.; Cowen, D.; Davoudiasl, H.; Gouvea, A. D.; Dean, D. J.; Deichert, G.; Descamps, F.; DeYoung, T.; Diwan, M. V.; Djurcic, Zelimir; Dolinski, M. J.; Dolph, J.; Donnelly, B.; Dwyer, D. A.; Dytman, S.; Efremenko, Y.; Everett, L. L.; Fava, A.; Figueroa-Feliciano, E.; Fleming, B.; Friedland, A.; Fujikawa, B. K.; Gaisser, T. K.; Galeazzi, M.; Galehouse, D. C.; Galindo-Uribarri, A.; Garvey, G. T.; Gautam, S.; Gilje, K. E.; Gonzalez-Garcia, M.; Goodman, M. C.; Gordon, H.; Gramellini, E.; Green, M. P.; Guglielmi, A.; Hackenburg, R. W.; Hackenburg, A.; Halzen, F.; Han, K.; Hans, S.; Harris, D.; Heeger, K. M.; Herman, M.; Hill, R.; Holin, A.; Huber, Patrick; Jaffe, D. E.; Johnson, R. A.; Joshi, J.; Karagiorgi, Georgia S.; Kaufman, L. J.; Kayser, B.; Kettell, S. H.; Kirby, B. J.; Klein, J. R.; Kolomensky, Y. G.; Kriske, R. M.; Lane, C. E.; Langford, T. J.; Lankford, A.; Lau, K.; Learned, J. G.; Ling, J.; Link, Jonathan M.; Lissauer, D.; Littenberg, L.; Littlejohn, B. R.; Lockwitz, S.; Lokajicek, M.; Louis, W. C.; Luk, K.; Lykken, J.; Marciano, W. J.; Maricic, Jelena; Markoff, D. M.; Caicedo, D. A. M.; Mauger, C.; Mavrokoridis, K.; McCluskey, E.; McKeen, D.; McKeown, R.; Mills, G.; Mocioiu, I.; Monreal, B.; Mooney, M. R.; Morfin, J. G.; Mumm, P.; Napolitano, J.; Neilson, R.; Nelson, J. K.; Nessi, M.; Norcini, D.; Nova, F.; Nygren, D. R.; Orebi Gann, G. D.; Palamara, O.; Parsa, Z.; Patterson, R.; Paul, P.; Pocar, A.; Qian, X.; Raaf, J. L.; Rameika, R.; Ranucci, G.; Ray, H.; Reyna, D.; Rich, G. C.; Rodrigues, P.; Romero, E. R.; Rosero, R.; Rountree, S. D.; Rybolt, B.; Sanchez, Maria Cristina; Santucci, G.; Schmitz, D.; Scholberg, K.; Seckel, D.; Shaevitz, Marjorie Hansen; Shrock, R.; Smy, M. B.; Soderberg, M.; Sonzogni, A.; Sousa, A. B.; Spitz, Joshua; John, J. M. S.; Stewart, J.; Strait, J. B.; Sullivan, G.; Svoboda, R.; Szelc, A. M.; Tayloe, R.; Thomson, M.; Toups, M.; Vacheret, A.; Vagins, M. R.; Water, R. G. V. D.; Vogelaar, R. Bruce; Weber, M.; Weng, W.; Wetstein, M.; White, C.; White, B. R.; Whitehead, L.; Whittington, D. W.; Wilking, M. J.; Wilson, R. J.; Wilson, P.; Winklehner, D.; Winn, D. R.; Worcester, E.; Yang, L.; Yeh, M.; Yokley, Z. W.; Yoo, J.; Yu, B.; Yu, J.; Zhang, C. (2015-04-01)The US neutrino community gathered at the Workshop on the Intermediate Neutrino Program (WINP) at Brookhaven National Laboratory February 4-6, 2015 to explore opportunities in neutrino physics over the next five to ten years. Scientists from particle, astroparticle and nuclear physics participated in the workshop. The workshop examined promising opportunities for neutrino physics in the intermediate term, including possible new small to mid-scale experiments, US contributions to large experiments, upgrades to existing experiments, R&D plans and theory. The workshop was organized into two sets of parallel working group sessions, divided by physics topics and technology. Physics working groups covered topics on Sterile Neutrinos, Neutrino Mixing, Neutrino Interactions, Neutrino Properties and Astrophysical Neutrinos. Technology sessions were organized into Theory, Short-Baseline Accelerator Neutrinos, Reactor Neutrinos, Detector R&D and Source, Cyclotron and Meson Decay at Rest sessions.This report summarizes discussion and conclusions from the workshop.
- Internal Radioactive Source Calibration of the Borexino Solar Neutrino ExperimentBack, Henning Olling (Virginia Tech, 2004-06-18)A measurement of solar neutrinos below 1 MeV of energy will further our knowledge of the neutrino's mass and mixing properties and will provide a probe to possible physics beyond the standard model of particle physics, as well as advance our understanding of energy production in the Sun. Borexino is a liquid scintillator detector that will measure the neutrino energy spectrum to the lowest energy threshold to date. It has been designed to measure the flux of the mono-energetic neutrinos produced by electron capture on 7Be in the Sun's core, which will produce a Compton-like edge in the energy spectrum. Because of the low count rate, Borexino requires extremely low backgrounds, and a good understanding of the backgrounds that do exist. Although the purification techniques used for the scintillator lowered the radioactive contaminates to levels never before achieved, cuts must still be made to the data. At Virginia Tech, we have developed an internal source calibration program that will be able to give us a thorough understanding of both the pulse shape discrimination efficiency and the energy and time response of Borexino. Energy calibration for alphas, betas, and gammas (energy scales) can be accomplished with such sources. When the calibration source is used in conjunction with an accurate source location system any spatial dependencies can be found. The system will use different types of sources at various energies to give the required information to make the cuts needed to extract believable physics from the detector.
- Investigation of Microbunching Instabilities in Modern Recirculating AcceleratorsTsai, Cheng-Ying (Virginia Tech, 2017-04-20)Particle accelerators are machines to accelerate and store charged particle beams, such as electrons or protons, to the energy levels for various scientific applications. There are three basic types of particle accelerators: linear accelerators (linac), storage-ring (or circular) accelerators, and recirculating accelerators. The third type, also the most recent one, is designed to accelerate a particle beam in a short section of linac, circulate and then continue to accelerate it for energy boost or decelerate it for energy recovery. The modern recirculating machines possess the advantages to both accelerate and preserve the beam with high beam quality, as well as efficiently reuse the accelerating components. As modern accelerators push toward the high-brightness or high-intensity frontier by demanding particles in a highly charged bunch to concentrate in an ever-decreasing beam phase space, the interaction amongst particles via their self-generated electromagnetic fields can potentially lead to coherent instabilities of the beam and thus pose significant challenges to the machine design and operation. Microbunching instability (MBI) has been one of the most challenging issues for such high-brightness or high-intensity beam transport, as it would degrade lasing performance in the fourth-generation light sources, reduce cooling efficiency in electron cooling facilities, and eventually compromise the luminosity of colliding beams in lepton or lepton-hadron colliders. The dissertation work will focus on the MBI in modern recirculating electron accelerators. The research attempts to develop a comprehensive theoretical formulation of MBI with aspects including among various degrees of freedoms the beam itself, the beamline lattice optics, and incorporation of all relevant collective effects that the beam encounters, for example the coherent synchrotron radiation (CSR) and the longitudinal space charge (LSC) effects. This dissertation includes the following seven themes: 1) Development and generalization of MBI theory to arbitrary linear lattices and coupled beams with constant and varying energies; 2) Construction of CSR impedance models from steady state to transient state and from high to low energy regime; 3) Numerical implementation of the developed theory as a fast and numerical-noise-free Vlasov solver and benchmarking with massive particle tracking simulation; 4) Exploration of multistage cascaded amplification mechanism of CSR microbunching development; 5) Control of CSR-induced MBI in multi-bend transport or recirculation arcs; 6) Study of more aspects of microbunched structures in beam phase spaces; and 7) Study of MBI for magnetized beams and confirming the suppression of MBI for a recent cooler design for Jefferson Lab Electron Ion Collider project.
- Light Sterile Neutrinos: A White PaperAbazajian, Kevork N.; Acero, M. A.; Agarwalla, S. K.; Aguilar-Arevalo, A. A.; Albright, C. H.; Antusch, S.; Arguelles, C. A.; Balantekin, A. B.; Barenboim, G.; Barger, V.; Bernardini, P.; Bezrukov, F.; Bjaelde, O. E.; Bogacz, S. A.; Bowden, N. S.; Boyarsky, A.; Bravar, A.; Berguno, D. B.; Brice, S. J.; Bross, A. D.; Caccianiga, B.; Cavanna, F.; Chun, E. J.; Cleveland, B. T.; Collin, A. P.; Coloma, P.; Conrad, Janet M.; Cribier, M.; Cucoanes, A. S.; D'Olivo, J. C.; Das, S.; Gouvea, A. D.; Derbin, A. V.; Dharmapalan, R.; Diaz, J. S.; Ding, X. J.; Djurcic, Zelimir; Donini, A.; Duchesneau, D.; Ejiri, H.; Elliott, S. R.; Ernst, D. J.; Esmaili, A.; Evans, J. J.; Fernandez-Martinez, Enrique; Figueroa-Feliciano, E.; Fleming, B. T.; Formaggio, J. A.; Franco, D.; Gaffiot, J.; Gandhi, R.; Gao, Y.; Garvey, G. T.; Gavrin, V. N.; Ghoshal, P.; Gibin, D.; Giunti, C.; Gninenko, S. N.; Gorbachev, V. V.; Gorbunov, D. S.; Guenette, R.; Guglielmi, A.; Halzen, F.; Hamann, J.; Hannestad, S.; Haxton, W.; Heeger, K. M.; Henning, R.; Hernandez, P.; Huber, Patrick; Huelsnitz, W.; Ianni, A.; Ibragimova, T. V.; Karadzhov, Y.; Karagiorgi, Georgia S.; Keefer, G.; Kim, Y. D.; Kopp, J.; Kornoukhov, V. N.; Kusenko, A.; Kyberd, P.; Langacker, P.; Lasserre, T.; Laveder, M.; Letourneau, A.; Lhuillier, D.; Li, Y. F.; Lindner, M.; Link, Jonathan M.; Littlejohn, B. L.; Lombardi, Paolo; Long, K.; Lopez-Pavon, J.; Louis, W. C.; Ludhova, L.; Lykken, J. D.; Machado, P. A. N.; Maltoni, M.; Mann, W. A.; Marfatia, D.; Mariani, Camillo; Matveev, V. A.; Mavromatos, N. E.; Melchiorri, A.; Meloni, David; Mena, O.; Mention, G.; Merle, A.; Meroni, E.; Mezzetto, M.; Mills, G. B.; Minic, Djordje; Miramonti, L.; Mohapatra, D.; Mohapatra, R. N.; Montanari, C.; Mori, Y.; Mueller, T. A.; Mumm, H. P.; Muratova, V. N.; Nelson, A. E.; Nico, J. S.; Noah, E.; Nowak, J.; Smirnov, O. Y.; Obolensky, M.; Pakvasa, S.; Palamara, O.; Pallavicini, M.; Pascoli, S.; Patrizii, L.; Pavlovic, Z.; Peres, O. L. G.; Pessard, H.; Pietropaolo, F.; Pitt, M. L.; Popovic, M.; Pradler, J.; Ranucci, G.; Ray, H.; Razzaque, S.; Rebel, B.; Robertson, R. G. H.; Rodejohann, W.; Rountree, S. D.; Rubbia, C.; Ruchayskiy, O.; Sala, P. R.; Scholberg, K.; Schwetz, T.; Shaevitz, Marjorie Hansen; Shaposhnikov, M.; Shrock, R.; Simone, S.; Skorokhvatov, Mikhail D.; Sorel, M.; Sousa, A.; Spergel, D. N.; Spitz, Joshua; Stanco, L.; Stancu, Ion; Suzuki, A.; Takeuchi, Tatsu; Tamborra, Irene; Tang, J.; Testera, G.; Tian, X. C.; Tonazzo, A.; Tunnell, C. D.; Water, R. G. V. D.; Verde, L.; Veretenkin, E. P.; Vignoli, C.; Vivier, M.; Vogelaar, R. Bruce; Wascko, M. O.; Wilkerson, J. F.; Winter, W.; Wong, Y. Y. Y.; Yanagida, T. T.; Yasuda, O.; Yeh, M.; Yermia, F.; Yokley, Z. W.; Zeller, Geralyn P.; Zhan, L.; Zhang, H. (2012-04)This white paper addresses the hypothesis of light sterile neutrinos based on recent anomalies observed in neutrino experiments and the latest astrophysical data.
- Measurement of isotopic separation of argon with the prototype of the cryogenic distillation plant Aria for dark matter searchesAaron, E.; Agnes, P.; Ahmad, I.; Albergo, S.; Albuquerque, I. F. M.; Alexander, T.; Alton, A. K.; Amaudruz, P.; Atzori Corona, M.; Ave, M.; Avetisov, I. C.; Azzolini, O.; Back, H. O.; Balmforth, Z.; Barrado, A.; Barrillon, P.; Basco, A.; Batignani, G.; Bocci, V.; Bonivento, W. M.; Bottino, B.; Boulay, M. G.; Busto, J.; Cadeddu, M.; Caminata, A.; Canci, N.; Capra, A.; Caprioli, S.; Caravati, M.; Cargioli, N.; Carlini, M.; Castello, P.; Cavalcante, P.; Cavuoti, S.; Cebrian, S.; Cela Ruiz, J. M.; Chashin, S.; Chepurnov, A.; Chyhyrynets, E.; Cifarelli, L.; Cintas, D.; Citterio, M.; Cleveland, B.; Cocco, V.; Conde Vilda, E.; Consiglio, L.; Copello, S.; Covone, G.; Czubak, M.; D’Aniello, M.; D’Auria, S.; Da Rocha Rolo, M. D.; Davini, S.; De Cecco, S.; De Guido, G.; De Gruttola, D.; De Pasquale, S.; De Rosa, G.; Dellacasa, G.; Derbin, A. V.; Devoto, A.; Di Capua, F.; Di Noto, L.; Di Stefano, P.; Dolganov, G.; Dordei, F.; Ellingwood, E.; Erjavec, T.; Farenzena, S.; Fernandez Diaz, M.; Fiorillo, G.; Franchini, P.; Franco, D.; Funicello, N.; Gabriele, F.; Gahan, D.; Galbiati, C.; Gallina, G.; Gallus, G.; Garbini, M.; Garcia Abia, P.; Gendotti, A.; Ghiano, C.; Giganti, C.; Giovanetti, G. K.; Goicoechea Casanueva, V.; Gola, A.; Grauso, G.; Grilli di Cortona, G.; Grobov, A.; Gromov, M.; Guan, M.; Guerzoni, M.; Gulino, M.; Guo, C.; Hackett, B. R.; Hallin, A. L.; Hamer, A.; Haranczyk, M.; Hessel, T.; Hill, S.; Horikawa, S.; Hubaut, F.; Hucker, J.; Hugues, T.; Ianni, An.; Ippolito, V.; Jillings, C.; Jois, S.; Kachru, P.; Kemp, A. A.; Kendziora, C. L.; Kimura, M.; Kochanek, I.; Kondo, K.; Korga, G.; Koulosousas, S.; Kubankin, A.; Kuss, M.; Kuźniak, M.; La Commara, M.; Lai, M.; Lami, N.; Le Guirriec, E.; Leason, E.; Leoni, A.; Lidey, L.; Lippi, F.; Lissia, M.; Luzzi, L.; Lychagina, O.; Maccioni, N.; Macfadyen, O.; Machulin, I. N.; Manecki, S.; Manthos, I.; Mapelli, L.; Margotti, A.; Mari, S. M.; Mariani, C.; Maricic, J.; Marini, A.; Martínez, M.; Martoff, C. J.; Mascia, M.; Masoni, A.; Matteucci, G.; Mavrokoridis, K.; Maxia, C.; McDonald, A. B.; Messina, A.; Milincic, R.; Mitra, A.; Moharana, A.; Moioli, S.; Monroe, J.; Moretti, E.; Morrocchi, M.; Mróz, T.; Muratova, V. N.; Muscas, C.; Musico, P.; Nania, R.; Nessi, M.; Nikolopoulos, K.; Nowak, J.; Olchansky, K.; Oleinik, A.; Oleynikov, V.; Organtini, P.; de Solórzano, A. O.; Pagani, L.; Pallavicini, M.; Pandola, L.; Pantic, E.; Paoloni, E.; Paternoster, G.; Pegoraro, P. A.; Pelczar, K.; Pellegrini, L. A.; Pellegrino, C.; Pesudo, V.; Piacentini, S.; Pietrofaccia, L.; Pino, N.; Pocar, A.; Poehlmann, D. M.; Pordes, S.; Pralavorio, P.; Price, D.; Ragusa, F.; Ramachers, Y.; Razeti, M.; Renshaw, A. L.; Rescigno, M.; Retiere, F.; Rignanese, L. P.; Ripoli, C.; Rivetti, A.; Roberts, A.; Roberts, C.; Rode, J.; Rogers, G.; Romero, L.; Rossi, M.; Rubbia, A.; Sabia, M. A.; Sabiu, G. M.; Salomone, P.; Sandford, E.; Sanfilippo, S.; Santone, D.; Santorelli, R.; Savarese, C.; Scapparone, E.; Schillaci, G.; Schukman, F.; Scioli, G.; Simeone, M.; Skensved, P.; Skorokhvatov, M. D.; Smirnov, O.; Smirnova, T.; Smith, B.; Spadoni, F.; Spangenberg, M.; Stefanizzi, R.; Steri, A.; Stornelli, V.; Stracka, S.; Stringer, M.; Sulis, S.; Sung, A.; Suvorov, Y.; Szelc, A. M.; Tartaglia, R.; Taylor, A.; Taylor, J.; Tedesco, S.; Testera, G.; Thieme, K.; Thorpe, T. N.; Tonazzo, A.; Tricomi, A.; Unzhakov, E. V.; Vallivilayil John, T.; Van Uffelen, M.; Viant, T.; Viel, S.; Vogelaar, R. Bruce; Vossebeld, J.; Wada, M.; Walczak, M. B.; Wang, H.; Wang, Y.; Westerdale, S.; Williams, L.; Wingerter-Seez, I.; Wojaczyński, R.; Wojcik, Ma. M.; Wright, T.; Xie, Y.; Yang, C.; Zabihi, A.; Zakhary, P.; Zani, A.; Zichichi, A.; Zuzel, G.; Zykova, M. P. (2023-05-31)The Aria cryogenic distillation plant, located in Sardinia, Italy, is a key component of the DarkSide-20k experimental program for WIMP dark matter searches at the INFN Laboratori Nazionali del Gran Sasso, Italy. Aria is designed to purify the argon, extracted from underground wells in Colorado, USA, and used as the DarkSide-20k target material, to detector-grade quality. In this paper, we report the first measurement of argon isotopic separation by distillation with the 26m tall Aria prototype. We discuss the measurement of the operating parameters of the column and the observation of the simultaneous separation of the three stable argon isotopes: 36Ar, 38Ar, and 40Ar. We also provide a detailed comparison of the experimental results with commercial process simulation software. This measurement of isotopic separation of argon is a significant achievement for the project, building on the success of the initial demonstration of isotopic separation of nitrogen using the same equipment in 2019.
- Measurement of the neutron beta-asymmetry parameter A(0) with ultracold neutronsPlaster, B.; Rios, R.; Back, H. O.; Bowles, T. J.; Broussard, L. J.; Carr, Rachel E.; Clayton, S.; Currie, S.; Filippone, B. W.; Garcia, A.; Geltenbort, P.; Hickerson, K. P.; Hoagland, J.; Hogan, G. E.; Hona, B.; Holley, A. T.; Ito, T. M.; Liu, C. Y.; Liu, J.; Makela, M.; Mammei, R. R.; Martin, J. W.; Melconian, D.; Mendenhall, M. P.; Morris, C. L.; Mortensen, R.; Pattie, R. W.; Galvan, A. P.; Pitt, M. L.; Ramsey, J. C.; Russell, R.; Saunders, A.; Schmid, R.; Seestrom, S. J.; Sjue, S.; Sondheim, W. E.; Tatar, E.; Tipton, B.; Vogelaar, R. Bruce; VornDick, B.; Wrede, C.; Xu, Y. P.; Yan, H.; Young, A. R.; Yuan, J.; Ucna Collaboration (American Physical Society, 2012-11-12)We present a detailed report of a measurement of the neutron beta-asymmetry parameter A(0), the parity-violating angular correlation between the neutron spin and the decay electron momentum, performed with polarized ultracold neutrons (UCN). UCN were extracted from a pulsed spallation solid deuterium source and polarized via transport through a 7-T magnetic field. The polarized UCN were then transported through an adiabatic-fast-passage spin-flipper field region, prior to storage in a cylindrical decay volume situated within a 1-T 2 x 2 pi solenoidal spectrometer. The asymmetry was extracted from measurements of the decay electrons in multiwire proportional chamber and plastic scintillator detector packages located on both ends of the spectrometer. From an analysis of data acquired during runs in 2008 and 2009, we report A(0) = -0.11966 +/- 0.00089(-0.00140)(+0.00123), from lambda = g(A)/g(V) = -1.27590 +/- 0.00239(-0.00377)(+0.00331). Complete details of the analysis are presented.
- Measuring the ⁷Be Neutrino Flux From the Sun: Calibration of the Borexino Solar Neutrino DetectorHardy, Steven (Virginia Tech, 2010-04-02)The Borexino solar neutrino detector is a real-time liquid scintillator detector designed to measure sub-MeV neutrinos. With its unprecedented level of radio-purity, Borexino is poised to provide the most precise measurements to-date of solar neutrino and geo-antineutrino fluxes. However, in order to reduce the systematic errors to sub-5% levels, the detector must be care- fully calibrated to understand, among other things, the position and energy reconstructions. To that end, the Virginia Tech component of the Borexino collaboration has constructed a system for deploying and locating calibration sources within the detector. The system was used in four separate calibration campaigns and deployed numerous sources in almost 300 locations throughout the detector. The data from the calibrations have already resulted in the reduction of several sources of systematic error by a factor of two or more. With the results from the calibration, the Borexino detector has entered a new era of low- energy, high-precision, neutrino detection. This work was supported by NSF Grant 0802114
- Modulations of the cosmic muon signal in ten years of Borexino dataAgostini, Matteo; Altenmueller, Konrad; Appel, S.; Atroshchenko, Victor; Bagdasarian, Zara; Basilico, D.; Bellini, G.; Benziger, Jay; Bick, D.; Bolognino, Irene; Bonfini, G.; Bravo, D.; Caccianiga, B.; Calaprice, F.; Caminata, A.; Caprioli, S.; Carlini, M.; Cavalcante, P.; Cavanna, F.; Chepurnov, A.; Choi, K.; Collica, L.; D'Angelo, D.; Davini, S.; Derbin, A. V.; Ding, X. F.; Di Ludovico, Antonio; Di Noto, Lea; Drachnev, I.; Fomenko, K.; Formozov, A.; Franco, D.; Gabriele, Federico; Galbiati, C.; Gschwender, M.; Ghiano, C.; Giammarchi, Marco; Goretti, A.; Gromov, M.; Guffanti, D.; Hagner, C.; Houdy, T.; Hungerford, Ed V.; Ianni, Aldo; Ianni, Andrea; Jany, A.; Jeschke, D.; Kobychev, V.; Korablev, D.; Korga, G.; Kudryavtsev, V. A.; Kumaran, S.; Lachenmaier, Tobias; Laubenstein, Matthias; Litvinovich, E.; Lombardi, Francesco; Lombardi, Paolo; Ludhova, L.; Lukyanchenko, G.; Lukyanchenko, L.; Machulin, I. N.; Manuzio, G.; Marcocci, S.; Maricic, Jelena; Martyn, J.; Meighen-Berger, S.; Meroni, E.; Meyer, M.; Miramonti, L.; Misiaszek, M.; Muratova, V. N.; Neumair, B.; Nieslony, M.; Oberauer, L.; Opitz, B.; Orekhov, V.; Ortica, F.; Pallavicini, M.; Papp, L.; Penek, Oe; Pietrofaccia, L.; Pilipenko, N.; Pocar, A.; Porcelli, A.; Raikov, G.; Ranucci, G.; Razeto, A.; Re, A.; Redchuk, M.; Romani, A.; Rossi, Nicola; Rottenanger, Sebastian; Schoenert, S.; Semenov, D. A.; Skorokhvatov, Mikhail D.; Smirnov, O. Y.; Sotnikov, A.; Stokes, Lee F. F.; Suvorov, Yura; Tartaglia, R.; Testera, G.; Thurn, J.; Toropova, M.; Unzhakov, E. V.; Vishneva, A.; Vogelaar, R. Bruce; von Feilitzsch, F.; Weinz, S.; Wojcik, M. M.; Wurm, M.; Yokley, Z. W.; Zaimidoroga, O.; Zavatarelli, S.; Zuber, Kai; Zuzel, G. (2019-02)We have measured the flux of cosmic muons in the Laboratori Nazionali del Gran Sasso at 3800 m.w.e. to be (3.432 +/- 0.003) center dot 10(-4) m(-2) s(-1) based on ten years of Borexino data acquired between May 2007 and May 2017. A seasonal modulation with a period of (366.3 +/- 0.6) d and a relative amplitude of (1.36 +/- 0.04)% is observed. The phase is measured to be (181.7 +/- 0.4) d, corresponding to a maximum at the 1 st of July. Using data inferred from global atmospheric models, we show the muon flux to be positively correlated with the atmospheric temperature and measure the e ff ective temperature coe ffi cient alpha(T) = 0.90 +/- 0.02. The origin of cosmic muons from pion and kaon decays in the atmosphere allows to interpret the e ff ective temperature coe ffi cient as an indirect measurement of the atmospheric kaon-topion production ratio r(K/pi) = 0.11(-0.07)(+0.11) for primary energies above 18TeV. We find evidence for a long-term modulation of the muon flux with a period of similar to 3000 d and a maximum in June 2012 that is not present in the atmospheric temperature data. A possible correlation between this modulation and the solar activity is investigated. The cosmogenic neutron production rate is found to show a seasonal modulation in phase with the cosmic muon flux but with an increased amplitude of (2.6 +/- 0.4)%.