MOLLER Source and Beam Control for Parity Experiments

即将到来的MOLLER实验旨在以前所未有的灵敏度探测基本相互作用，以发现超越标准模型的新物理。MOLLER是一个非常精确的实验，在这个实验中，高能电子束将被引导到液氢目标中包含的电子上。电子束中的电子将在一个方向上极化，然后翻转180度。通过比较电子在一个极化方向和另一个极化方向上的散射速率，该实验对可能存在于标准模型之外的新粒子很敏感。该奖项支持对实现所需的极化和翻转极化至关重要的研究。一个补充的研究组成部分是为拟议的COIN实验开发一个详细的设计，该实验将研究质子的奇异夸克含量。该研究计划将侧重于模拟，目的是开发COIN实验的详细设计。该项目将对高中生和本科生进行基本的激光实验室技能教育，并培养博士后和研究生成为宇称实验光束控制方面的世界级专家。PI致力于支持未来科学家的教育，创造和维持一个积极、包容、安全和专业的研究和培训环境。PI旨在支持本科生参与研究，包括来自代表性不足群体的本科生或高中生。PI打算让研究小组的成员参加印第安纳大学物理学院的外展计划。即将在杰弗逊实验室进行的MOLLER实验，是一个国家加速器设施，目的是以前所未有的灵敏度在低能和高能尺度上探测电弱相互作用，以发现新的超越标准模型的动力学。MOLLER是在电子-电子散射中寻找新的中性电流的一种极其精确的违反奇偶电子散射实验。这一研究计划对于实现MOLLER的奇偶质量光束是必不可少的，以满足其严格的系统不确定性目标，这是由光束不对称引起的。本计画的主要研究方向为即将进行的MOLLER实验的电子束控制。这项工作将涉及杰斐逊实验室的光束研究，极化源的努力，以及在MOLLER运行1期间对光束不对称的管理。其他补充工作包括拟议的COIN实验。COIN实验是杰斐逊实验室提出的一项实验，旨在通过测量弹性纵向极化束电子-质子散射中的奇偶违反不对称性（PVA）来寻找2.5 (GeV/c)2下质子的非零奇异形状因子。研究目标包括将模拟工作投入到杰斐逊实验室提出的COIN实验的详细设计中，以寻找质子的非零奇异形状因子，建立在宇称违反的专业知识的基础上，通过测量的实验细节进行工作。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

The upcoming MOLLER experiment is designed to probe fundamental interactions with unprecedented sensitivity to discover new physics beyond the Standard Model. MOLLER is an extremely precise experiment in which a high energy electron beam will be directed at electrons contained in a liquid hydrogen target. The electrons in the beam will be polarized in one direction and then flipped 180 degrees. By comparing the rate that electrons scatter with one polarization direction to the other, the experiment is sensitive to new particles that might exist beyond the Standard Model. This award supports research that is essential for achieving the required polarization and flipping of that polarization. A complementary research component is to develop a detailed design for the proposed COIN experiment that will investigate the strange quark content of protons. This research program will focus on simulations with the aim of developing detailed designs for the COIN experiment. This program will educate both high school students and undergraduates in fundamental laser laboratory skills and train postdoc and graduate students to become world experts in parity experiment beam control. The PI is committed to supporting the education of future scientists and creating and sustaining a positive, inclusive, safe, and professional research and training environment. The PI intends to support undergraduate participation in research, including an undergraduate or high school student from an underrepresented group. The PI intends to have members of the research group participate in outreach programs at IU Physics. The aim of the upcoming MOLLER experiment at Jefferson Laboratory, a national accelerator facility, is to probe electroweak interactions with unprecedented sensitivity reach at both low and high energy scales to discover new beyond the Standard Model dynamics. MOLLER is an extremely precise parity violating electron scattering (PVES) experiment searching for new neutral currents in electron-electron scattering. This research program is essential for the achieving parity quality beam for MOLLER to meet its stringent systematic uncertainty goals arising from beam asymmetries. The main thrust of the research in this project is electron beam control for the upcoming MOLLER experiment. This effort will involve beam studies at Jefferson Lab, polarized source efforts, and management of beam asymmetries during MOLLER Run 1. Additional complementary efforts include efforts on the proposed COIN experiment. The COIN experiment is a proposed experiment at Jefferson Laboratory to search for a nonzero strange form factor of the proton at 2.5 (GeV/c)2 via a measurement of the parity-violating asymmetry (PVA) in elastic longitudinally polarized beam electron-proton scattering. Research goals include devoting simulation efforts towards development of a detailed design for the proposed COIN experiment at Jefferson Laboratory to search for a nonzero strange form factor of the proton, building on expertise in parity violation to work through experimental details of the measurement.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.