The COHERENT Experiment at the Spallation Neutron Source
The COHERENT Experiment at the Spallation Neutron Source
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DOI：
10.2172/1222694
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发表时间：
2015-09
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通讯作者：
C. C. D. Akimov-C.;Peibo An;C. Awe;P. Barbeau;P. Barton;B. Becker;V. Belov;A. Bolozdynya;A. Burenkov;B. Cabrera-Palmer;J. Collar;R. Cooper;R. Cooper;C. Cuesta;D. Dean;J. Detwiler;A. Dolgolenko;Y. Efremenko;S. Elliott;A. Etenko;N. Fields;W. Fox;A. Galindo-Uribarri;M. Green;M. Heath;S. Hedges;D. Hornback;E. Iverson;L. Kaufman;S. Klein;A. Khromov;A. Konovalov;A. Kovalenko;A. Kumpan;C. Leadbetter;L. Li;W. Lu;Y. Melikyan;D. Markoff;K. Miller;M. Middlebrook;P. Mueller;P. Naumov;J. Newby;D. Parno;S. Penttila;G. Perumpilly;D. Radford;H. Ray;J. Raybern;D. Reyna;G. Rich;D. Rimal;D. Rudik;K. Scholberg;B. Scholz;W. Snow;A. Sosnovtsev;A. Shakirov;S. Suchyta;B. Suh;R. Tayloe;R. Thornton;A. Tolstukhin;K. Vetter;C. -. Yu
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文献类型：
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作者：
C. C. D. Akimov-C.;Peibo An;C. Awe;P. Barbeau;P. Barton;B. Becker;V. Belov;A. Bolozdynya;A. Burenkov;B. Cabrera-Palmer;J. Collar;R. Cooper;R. Cooper;C. Cuesta;D. Dean;J. Detwiler;A. Dolgolenko;Y. Efremenko;S. Elliott;A. Etenko;N. Fields;W. Fox;A. Galindo-Uribarri;M. Green;M. Heath;S. Hedges;D. Hornback;E. Iverson;L. Kaufman;S. Klein;A. Khromov;A. Konovalov;A. Kovalenko;A. Kumpan;C. Leadbetter;L. Li;W. Lu;Y. Melikyan;D. Markoff;K. Miller;M. Middlebrook;P. Mueller;P. Naumov;J. Newby;D. Parno;S. Penttila;G. Perumpilly;D. Radford;H. Ray;J. Raybern;D. Reyna;G. Rich;D. Rimal;D. Rudik;K. Scholberg;B. Scholz;W. Snow;A. Sosnovtsev;A. Shakirov;S. Suchyta;B. Suh;R. Tayloe;R. Thornton;A. Tolstukhin;K. Vetter;C. -. Yu
相干合作的主要目标是利用橡树岭国家实验室(ORNL)散裂中子源(SNS)提供的独特的、高质量的数十MeV中微子源测量相干弹性中微子-核散射(CEvNS)。尽管它的横截面很大，但CEVNS过程从未被观测到，因为由此产生的核反冲的微小能量是标准中微子探测器无法达到的。由于用于稀有衰变和弱相互作用大质量粒子(暗物质)搜索的超灵敏技术的发展，CEVNS的测量现在已经成为可能。CEVNS横截面在标准模型中被清楚地预测；因此，它的测量提供了标准模型试验。它与超新星物理和超新星-中微子探测相关，并能够验证暗物质探测器背景和探测器响应模型。从长远来看，CEVN的精确测量将解决核结构问题。Coherent将分阶段部署多种探测器技术：一个14公斤的CSI[Na]闪烁晶体，15公斤的p型点接触锗探测器，以及一个两相时间投影室中的100公斤液体氙气。经过广泛的背景测量活动，SNS地下室的一个位置已被证明是中子安静的，适合部署相干探测器套件。三个相干探测器子系统的同时部署将测试横截面的$N^2$相关性，并确保明确发现CEVN。这份文件简明扼要地描述了SNS的连贯物理动机、灵敏度和在四年时间尺度上完成的测量计划。
The COHERENT collaboration's primary objective is to measure coherent elastic neutrino-nucleus scattering (CEvNS) using the unique, high-quality source of tens-of-MeV neutrinos provided by the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). In spite of its large cross section, the CEvNS process has never been observed, due to tiny energies of the resulting nuclear recoils which are out of reach for standard neutrino detectors. The measurement of CEvNS has now become feasible, thanks to the development of ultra-sensitive technology for rare decay and weakly-interacting massive particle (dark matter) searches. The CEvNS cross section is cleanly predicted in the standard model; hence its measurement provides a standard model test. It is relevant for supernova physics and supernova-neutrino detection, and enables validation of dark-matter detector background and detector-response models. In the long term, precision measurement of CEvNS will address questions of nuclear structure. COHERENT will deploy multiple detector technologies in a phased approach: a 14-kg CsI[Na] scintillating crystal, 15 kg of p-type point-contact germanium detectors, and 100 kg of liquid xenon in a two-phase time projection chamber. Following an extensive background measurement campaign, a location in the SNS basement has proven to be neutron-quiet and suitable for deployment of the COHERENT detector suite. The simultaneous deployment of the three COHERENT detector subsystems will test the $N^2$ dependence of the cross section and ensure an unambiguous discovery of CEvNS. This document describes concisely the COHERENT physics motivations, sensitivity and plans for measurements at the SNS to be accomplished on a four-year timescale.