Beam Modulation System for the Qweak Experiment at Jefferson Lab

被引：0

作者：

Nuruzzaman ^{[1
]}

机构：

[1] Hampton Univ, Hampton, VA 23668 USA

来源：

11TH CONFERENCE ON THE INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS (CIPANP 2012) | 2013年 / 1560卷

关键词：

Parity-violation; beam modulation; Q(weak); Jefferson Lab; beam-optics; sensitivity;

D O I：

10.1063/1.4826763

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The Q(weak) experiment aims to measure the weak charge of the proton to 4% via the parity-violating asymmetry (similar to-200 ppb) in elastic e+p scattering. The scattering rate is largely influenced by five beam parameters: horizontal position (X), angle (X'), vertical position (Y), angle (Y'), and beam energy (E). Changes in these parameters when the beam polarization is reversed will create a false asymmetry. To measure the detector sensitivities, we modulate X, X', Y, Y' using four air-core dipoles in the Hall C beamline as well as beam energy with a superconducting RF cavity. Linear regression is then used to remove the false asymmetry. The beam modulation system has also proven valuable for tracking changes in the Hall-C beamline optics including dispersion at the target.

引用

页码：240 / 242

页数：3

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