MOLLER Source and Beam Control for Parity Experiments

用于奇偶校验实验的 MOLLER 光源和光束控制

• 批准号: 2309944
• 负责人: Caryn Palatchi
• 金额: $ 52.5万
• 依托单位: Indiana University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-07-15 至 2026-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2309944&HistoricalAwards=false
• 关键词: MOLLER; Source; Beam; Control; Parity

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.

即将到来的穆勒实验旨在以前所未有的灵敏度探索基本相互作用，以发现超越标准模型的新物理。穆勒是一个非常精确的实验，在这个实验中，高能电子束将指向液氢目标中包含的电子。光束中的电子将在一个方向上极化，然后翻转180度。通过比较电子沿一个极化方向和另一个极化方向的散射速度，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极化和这种极化的翻转至关重要的研究。一个补充的研究部分是为拟议的硬币实验制定详细的设计，该实验将调查质子的奇怪夸克含量。这项研究计划将重点放在模拟上，目的是为硬币实验开发详细的设计。该计划将教育高中生和本科生基本的激光实验室技能，并培养博士后和研究生成为世界对等实验光束控制方面的专家。该协会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打算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。国际和平研究所打算让研究小组的成员参加密歇根大学物理学院的外展项目。即将在国家加速器设施杰斐逊实验室进行的穆勒实验的目的是探测具有前所未有的灵敏度的电弱相互作用，在低能和高能尺度上都能达到，以发现新的超越标准模型的动力学。Moller是一个非常精确的宇称破坏电子散射(PVES)实验，它在电子-电子散射中寻找新的中性电流。这项研究计划对于穆勒达到同等质量的光束至关重要，以满足由光束不对称引起的严格的系统不确定性目标。该项目的主要研究方向是为即将到来的穆勒实验进行电子束控制。这项工作将包括杰斐逊实验室的光束研究，偏振光源的努力，以及在穆勒运行1期间对光束不对称性的管理。其他补充努力包括拟议的COIN实验。Coin实验是Jefferson实验室提出的一项实验，旨在通过测量弹性纵向极化束流电子-质子散射中的宇称破坏不对称性(PVA)来寻找2.5(GeV/c)2的质子的非零奇异形状因子。研究目标包括致力于在杰斐逊实验室为拟议的硬币实验开发详细的设计，以寻找质子的非零奇怪形状因数，建立在宇称破坏方面的专业知识，以完成测量的实验细节。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。