Effect of Low Electric Fields on Alpha Scintillation Light Yield in   Liquid Argon

P. Agnes; I. F. M. Albuquerque; T. Alexander; A. K. Alton; D. M.; Asner; H. O. Back; B. Baldin; K. Biery; V. Bocci; G. Bonfini; W. Bonivento,; M. Bossa; B. Bottino; A. Brigatti; J. Brodsky; F. Budano; S. Bussino; M.; Cadeddu; M. Cadoni; F. Calaprice; N. Canci; A. Candela; M. Caravati; M.; Cariello; M. Carlini; S. Catalanotti; P. Cavalcante; A. Chepurnov; C.; Cical\`o; A. G. Cocco; G. Covone; D. D'Angelo; M. D'Incecco; S. Davini; S. De; Cecco; M. De Deo; M. De Vincenzi; A. Derbin; A. Devoto; F. Di Eusanio; G. Di; Pietro; C. Dionisi; E. Edkins; A. Empl; A. Fan; G. Fiorillo; K. Fomenko; G.; Forster; D. Franco; F. Gabriele; C. Galbiati; S. Giagu; C. Giganti; G. K.; Giovanetti; A. M. Goretti; F. Granato; M. Gromov; M. Guan; Y. Guardincerri,; B. R. Hackett; K. Herner; D. Hughes; P. Humble; E. V. Hungerford; A. Ianni,; I. James; T. N. Johnson; C. Jollet; K. Keeter; C. L. Kendziora; G. Koh; D.; Korablev; G. Korga; A. Kubankin; X. Li; M. Lissia; B. Loer; P. Lombardi; G.; Longo; Y. Ma; I. N. Machulin; A. Mandarano; S. M. Mari; J. Maricic; L.; Marini; C. J. Martoff; A. Meregaglia; P. D. Meyers; R. Milincic; J. D.; Miller; D. Montanari; A. Monte; B. J. Mount; V. N. Muratova; P. Musico; J.; Napolitano; A. Navrer Agasson; S. Odrowski; A. Oleinik; M. Orsini; F. Ortica,; L. Pagani; M. Pallavicini; E. Pantic; S. Parmeggiano; K. Pelczar; N.; Pelliccia; A. Pocar; S. Pordes; D. A. Pugachev; H. Qian; K. Randle; G.; Ranucci; M. Razeti; A. Razeto; B. Reinhold; A. L. Renshaw; M. Rescigno; Q.; Riffard; A. Romani; B. Rossi; N. Rossi; D. Rountree; D. Sablone; P. Saggese,; W. Sands; C. Savarese; B. Schlitzer; E. Segreto; D. A. Semenov; E. Shields,; P. N. Singh; M. D. Skorokhvatov; O. Smirnov; A. Sotnikov; C. Stanford; Y.; Suvorov; R. Tartaglia; J. Tatarowicz; G. Testera; A. Tonazzo; P. Trinchese,; E. V. Unzhakov; M. Verducci; A. Vishneva; B. Vogelaar; M. Wada; S. Walker; H.; Wang; Y. Wang; A. W. Watson; S. Westerdale; J. Wilhelmi; M. M. Wojcik; X.; Xiang; X. Xiao; J. Xu; C. Yang; W. Zhong; C. Zhu; G. Zuzel

arXiv:1611.00241·physics.ins-det·January 26, 2017

Effect of Low Electric Fields on Alpha Scintillation Light Yield in Liquid Argon

P. Agnes, I. F. M. Albuquerque, T. Alexander, A. K. Alton, D. M., Asner, H. O. Back, B. Baldin, K. Biery, V. Bocci, G. Bonfini, W. Bonivento,, M. Bossa, B. Bottino, A. Brigatti, J. Brodsky, F. Budano, S. Bussino, M., Cadeddu, M. Cadoni, F. Calaprice, N. Canci, A. Candela

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TL;DR

This study investigates how low electric fields influence alpha particle scintillation light yield in liquid argon, revealing a modest increase in light output with increasing electric field strength.

Contribution

It provides the first quantitative measurement of alpha scintillation light yield dependence on low electric fields in liquid argon.

Findings

01

Light yield increases by 2% at 200 V/cm electric field.

02

Alpha scintillation response is sensitive to low electric fields.

03

Results inform optimization of liquid argon detectors.

Abstract

Measurements were made of scintillation light yield of alpha particles from the $^{222}$ Rn decay chain within the DarkSide-50 liquid argon time projection chamber. The light yield was found to increase as the applied electric field increased, with alphas in a 200 V/cm electric field exhibiting a 2% increase in light yield compared to alphas in no field.

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