Annihilation detector for an in-beam spectroscopy apparatus to measure the ground state hyperfine splitting of antihydrogen
Feb 11, 2017
4 pages
Part of Proceedings, 14th Vienna Conference on Instrumentation (VCI 2016) : Vienna, Austria, February 15-19, 2016, 579-582
Published in:
- Nucl.Instrum.Meth.A 845 (2017) 579-582
Contribution to:
- , 579-582
- VCI 2016
- Published: Feb 11, 2017
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Abstract: (Elsevier)
The matter-antimatter asymmetry observed in the universe today still lacks a quantitative explanation. One possible mechanism that could contribute to the observed imbalance is a violation of the combined Charge-, Parity- and Time symmetries (CPT). A test of CPT symmetry using anti-atoms is being carried out by the ASACUSA-CUSP collaboration at the CERN Antiproton Decelerator using a low temperature beam of antihydrogen—the most simple atomic system built only of antiparticles. While hydrogen is the most abundant element in the universe, antihydrogen is produced in very small quantities in a laboratory framework. A detector for in-beam measurements of the ground state hyperfine structure of antihydrogen has to be able to detect very low signal rates within high background. To fulfil this challenging task, a two layer barrel hodoscope detector was developed. It is built of plastic scintillators with double sided readout via Silicon Photomultipliers (SiPMs). The SiPM readout is done using novel, compact and cost efficient electronics that incorporate power supply, amplifier and discriminator on a single board. This contribution will evaluate the performance of the new hodoscope detector.- Antihydrogen
- Scintillator
- Hodoscope
- Silicon photomultiplier
- photomultiplier: silicon
- ground state: hyperfine structure
- antihydrogen
- hodoscope: design
- scintillation counter: plastics
- performance
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