Low-energy proton detection using silicon drift detectors, and precision measurements of the proton asymmetry in neutron decay

使用硅漂移探测器进行低能质子探测，并精确测量中子衰变中的质子不对称性

• 批准号: 167643526
• 负责人: Professor Dr. Oliver Zimmer
• 金额: --
• 依托单位: Institut Laue-Langevin (ILL)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/167643526?language=en
• 关键词: Low; energy; proton; detection; using

Silicon drift detectors (SDDs) offer significant advantages for the detection of protons from neutron decay compared to more traditional techniques. An excellent separation of the signal from noise is observed for protons accelerated to only a few keV. In view of an efficient exploitation of the planned instrument PERC it is proposed to further investigate the properties of this unique detector with the scope to minimise systematic effects in neutron decay studies. Although PERC will provide much higher count rates, experimental studies on proton counting and spectroscopy in neutron decay can be performed already now using the existing spectrometer aSPECT developed in a collaboration of Mainz University and the TU Munich. To use the full potential of aSPECT it is proposed to develop and employ a large 9-cell SDD. Complementary to a measurement of the proton recoil spectrum (grant application by W. Heil) a first measurement of the proton asymmetry in neutron decay on the 0.1 % accuracy level shall be performed.

硅漂移探测器（SDD）提供了显着的优势，从中子衰变的质子检测相比，更传统的技术。一个很好的分离的信号从噪声中观察质子加速到只有几个千电子伏。鉴于计划中的仪器PERC的有效利用，建议进一步研究这种独特的探测器的性质，以尽量减少中子衰变研究中的系统影响。虽然PERC将提供更高的计数率，质子计数和中子衰变光谱学的实验研究，现在已经可以使用现有的光谱仪aSPECT在美因茨大学和慕尼黑的合作开发。为了充分发挥aSPECT的潜力，建议开发并采用大型9单元SDD。作为对质子反冲谱测量的补充（W. Heil）应在0.1%精度水平上对中子衰变中的质子不对称性进行首次测量。