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arXiv 0705.3665nucl-ex
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萨德伯里中微子天文台低本底$^3$ He正比计数器阵列

An array of low-background $^3$He proportional counters for the Sudbury Neutrino Observatory

J. F. Amsbaugh, J. M. Anaya, J. Banar, T. J. Bowles, M. C. Browne, T. V. Bullard, T. H. Burritt, G. A. Cox-Mobrand, X. Dai, H. Deng, M. Di Marco, P. J. Doe, M. … 展开作者

J. F. Amsbaugh, J. M. Anaya, J. Banar, T. J. Bowles, M. C. Browne, T. V. Bullard, T. H. Burritt, G. A. Cox-Mobrand, X. Dai, H. Deng, M. Di Marco, P. J. Doe, M. R. Dragowsky, C. A. Duba, F. A. Duncan, E. D. Earle, S. R. Elliott, E. -I. Esch, H. Fergani, J. A. Formaggio, M. M. Fowler, J. E. Franklin, P. Geissbühler, J. V. Germani, A. Goldschmidt, E. Guillian, A. L. Hallin, G. Harper, P. J. Harvey, R. Hazama, K. M. Heeger, J. Heise, A. Hime, M. A. Howe, M. Huang, L. L. Kormos, C. Kraus, C. B. Krauss, J. Law, I. T. Lawson, K. T. Lesko, J. C. Loach, S. Majerus, J. Manor, S. McGee, K. K. S. Miknaitis, G. G. Miller, B. Morissette, A. Myers, N. S. Oblath, H. M. O'Keeffe, R. W. Ollerhead, S. J. M. Peeters, A. W. P. Poon, G. Prior, S. D. Reitzner, K. Rielage, R. G. H. Robertson, P. Skensved, A. R. Smith, M. W. E. Smith, T. D. Steiger, L. C. Stonehill, P. M. Thornewell, N. Tolich, B. A. VanDevender, T. D. Van Wechel, B. L. Wall, H. Wan Chan Tseung, J. Wendland, N. West, J. B. Wilhelmy, J. F. Wilkerson, J. M. Wouters

摘要:

为了对萨德伯里中微子天文台(SNO)的太阳中微子总活动通量进行独特的测量,已经建造了一个中性电流探测器阵列(NCD)。SNO实验第三阶段的数据是在2004年11月至2006年11月期间收集的,在此之前,NCD阵列被添加以提高SNO探测器的中性电流灵敏度。该阵列由36串正比计数器组成,其中填充有$^3$ He和CF $_4$气体的混合物,能够检测D $_2$ O中中微子-氘中性电流反应释放的中子,以及四串填充有$^4$ He和CF $_4$气体的混合物用于背景测量。正比计数器直径为5 cm。部署的阵列总长度为398米。SNO NCD阵列是有史以来放射性最低的正比计数器大型阵列。本文介绍了NCD阵列的设计、构造、部署和表征,讨论了电子和数据采集系统,并考虑了事件签名和背景。

英文摘要:

An array of Neutral-Current Detectors (NCDs) has been built in order to make a unique measurement of the total active flux of solar neutrinos in the Sudbury Neutrino Observatory (SNO). Data in the third phase of the SNO experiment were collected between November 2004 and November 2006, after the NCD array was added to improve the neutral-current sensitivity of the SNO detector. This array consisted of 36 strings of proportional counters filled with a mixture of $^3$He and CF$_4$ gas capable of detecting the neutrons liberated by the neutrino-deuteron neutral current reaction in the D$_2$O, and four strings filled with a mixture of $^4$He and CF$_4$ gas for background measurements. The proportional counter diameter is 5 cm. The total deployed array length was 398 m. The SNO NCD array is the lowest-radioactivity large array of proportional counters ever produced. This article describes the design, construction, deployment, and characterization of the NCD array, discusses the electronics and data acquisition system, and considers event signatures and backgrounds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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