Prospects for measuring the gravitational free-fall of antihydrogen with emulsion detectors
Prospects for measuring the gravitational free-fall of antihydrogen with emulsion detectors
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DOI：
10.1088/1748-0221/8/08/p08013
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发表时间：
2013-08-01
影响因子：
1.3
通讯作者：
Zavatarelli, S.
中科院分区：
文献类型：
--
作者：
Aghion, S.;Ahlen, O.;Zavatarelli, S.
欧洲核子研究中心宙斯盾实验的主要目标是测试反物质的弱等效原理。AEgIS将测量反氢束穿过云纹偏转仪时的自由落体。目标是确定重力加速度(g)，初始相对精度为1%，通过使用乳胶探测器结合硅mu条探测器来测量飞行时间。核乳可以测量反氢原子的湮灭顶点，精度接近1-2 μ m r.m.s。我们在这里介绍了利用来自CERN反质子减速机的低能反质子在真空中工作的乳剂探测器的结果。并与蒙特卡罗模拟进行了比较，讨论了对AEgIS项目的影响。
The main goal of the AEgIS experiment at CERN is to test the weak equivalence principle for antimatter. AEgIS will measure the free-fall of an antihydrogen beam traversing a moire deflectometer. The goal is to determine the gravitational acceleration (g) over bar with an initial relative accuracy of 1% by using an emulsion detector combined with a silicon mu-strip detector to measure the time of flight. Nuclear emulsions can measure the annihilation vertex of antihydrogen atoms with a precision of similar to 1-2 mu m r.m.s. We present here results for emulsion detectors operated in vacuum using low energy antiprotons from the CERN antiproton decelerator. We compare with Monte Carlo simulations, and discuss the impact on the AEgIS project.