Collaborative Research: Development of a Particle Tracking System for the Qweak Experiment

威廉与玛丽学院将为杰斐逊实验室的量子弱实验设计和建造“区域3”跟踪室。这项开创性的实验将测量质子的弱电荷，作为对弱混合角sin2(Theta_W)与能量标度关系的精确测试，从而提供了一个超越基础物理标准模型的唯一灵敏的物理探测器。区域3线室是粒子跟踪系统的重要组成部分，为了精确测量弹性散射电子的运动学，以及对实验背景的关键研究，需要该系统。电离室将由两套大的(长2米，宽30厘米)垂直漂移室组成，共4个平面的x，y位置，具有延迟线读出，提供约100微米量级的位置分辨率和约1.5毫弧度的角分辨率。区域3项目将有一个重要的教育部分，因为本科生和研究生都将密切参与所有阶段：设计、原型制作、建造和测试。William&amp；Mary已承诺为该项目提供新的资金支持，为期三年，为两名入门级研究生提供资金支持，为物理研究生教育提供切实的影响。该项目将是为本科生生成高级论文和暑期研究项目的理想选择。

The College of William and Mary will design and build the `Region 3'tracking chambers for the Qweak experiment at Jefferson Lab. Thisgroundbreaking experiment will measure the weak charge of the proton,as a precision test of the energy scale dependence of the weak mixingangle, sin2(theta_W), thus providing a uniquely sensitive probe of physicsbeyond the Standard Model of fundamental physics. The Region 3 wire chambers are an essential component of the particletracking system, which is needed in order to precisely measure the kinematics ofthe elastically scattered electrons, as well as for critical studiesof experimental backgrounds. The chambers will consist of two sets of large (2 m long, 30 cm wide) vertical drift chambers fora total of 4 planes of x,y positions with delay-line readout, providinga position resolution on the order of 100 microns and an angular resolution of about 1.5 milliradians. The Region 3 project will have a substantial educational component,as both undergraduate and graduate students will be intimatelyinvolved in all phases: design, prototyping, construction and testingof the chambers. William & Mary has committed new funding support forthis project for two entry-level graduate students for three years,providing tangible impact on graduate physics education. The projectwill be be ideal for generating topics for senior theses and summerresearch projects for undergraduate students.