Investigations in Intermediate Energy Physics

中能物理研究

• 批准号: 1506363
• 负责人: Abdellah Ahmidouch
• 金额: $ 21.5万
• 依托单位: North Carolina Agricultural & Technical State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1506363&HistoricalAwards=false
• 关键词: Investigations; Intermediate; Energy; Physics

It is now a well-established fact that nucleons, protons and neutrons, are made up of more elementary particles called quarks. The measurements that will be carried out within this project will lead to a better understanding of nucleon structure and a better understanding of the effects of bound quarks moving at relativistic velocities. In particular, the proposed measurements will be used to extract detailed radial charge distributions of the proton and neutron, and will lead to a better understanding of how to interpret data from electron scattering experiments on nuclei. This project will train and support both undergraduate and graduate students, most of whom are minority students. The program is highly interdisciplinary. It includes work with both hardware and software i.e., electronics, nuclear detector systems, optics, computer simulation, and data analysis. Students engaged in the program will work in a state-of-the-art facility and interact with scientists from other nationally recognized universities. These research activities will significantly impact the training of the students, preparing them for entering the STEM workforce of the 21st century.This grant is to support research activities at North Carolina A&T State University on two programs. The first is the nucleon Form Factors (FF) program in Hall A at Jefferson Lab which is dedicated to the measurement of the neutron electromagnetic form factor ratio in double polarized, quasi-elastic scattering on 3He, and separately the neutron magnetic form factor in quasi-elastic scattering off the deuteron, both at high momentum transfer. The second is to measure the neutron Electric Form Factor at high momentum transfer from a deuterium target via recoil polarimetry in Hall C at Jefferson Lab. Elastic electromagnetic Form factors of the nucleon (proton or neutron) provide key information on the structure and the composition nature, of the nucleon, and the dynamics of quarks and gluons. For the FF program the group will build a photon detector array for the Gas Ring Imaging Cherenkov counter. For the experiment of Hall C, the group is building the polarimeter veto counters and the Delta-E detector arrays that identify the recoil proton from the neutron scattering events in the polarimeter analyzer.

核子、质子和中子都是由更基本的夸克组成的，这一点现在已是公认的事实。在该项目范围内进行的测量将有助于更好地了解核子结构，并更好地了解以相对论速度运动的束缚夸克的影响。特别是，拟议的测量将被用来提取详细的质子和中子的径向电荷分布，并将导致更好地理解如何解释数据从电子散射实验的核。该项目将培训和支持本科生和研究生，其中大多数是少数民族学生。 该计划是高度跨学科的。它包括硬件和软件的工作，即，电子学、核探测器系统、光学、计算机模拟和数据分析。参与该计划的学生将在最先进的设施中工作，并与来自其他国家认可的大学的科学家进行互动。这些研究活动将显着影响学生的培训，为他们进入干劳动力的21世纪。这笔赠款是支持研究活动在北卡罗来纳州AT州立大学的两个程序。第一个是位于杰斐逊实验室A厅的核子形状因子（FF）计划，该计划致力于测量3 He上双极化准弹性散射中的中子电磁形状因子比，并分别测量氘的准弹性散射中的中子磁形状因子，两者都是在高动量转移下。第二个是在杰斐逊实验室的C厅通过反冲偏振法测量氘靶在高动量转移时的中子电形状因子。核子（质子或中子）的弹性电磁形状因子提供了关于核子的结构和组成性质以及夸克和胶子动力学的关键信息。对于FF计划，该小组将为气环成像切伦科夫计数器建造光子探测器阵列。对于C厅的实验，该小组正在建造偏振计否决计数器和Delta-E探测器阵列，用于从偏振计分析仪中的中子散射事件中识别反冲质子。