Detection of antihydrogen annihilations with a Si-micro-strip and pure CsI detector

Details Detection of antihydrogen annihilations with a Si-micro-strip and pure CsI detector Detection of antihydrogen annihilations with a Si-micro-strip and pure CsI detector

2004-01-08

arxiv.org/abs/physics/0401034v1

Physics

Instrumentation and Detectors

7 pages, 5 figures; Proceedings for the 8th ICATPP Conference on Astroparticle, Particle, Space Physics, Detectors and Medical

Scientific paper

In 2002, the ATHENA collaboration reported the creation and detection of cold (~15 K) antihydrogen atoms [1]. The observation was based on the complete reconstruction of antihydrogen annihilations, simultaneous and spatially correlated annihilations of an antiproton and a positron. Annihilation byproducts are measured with a cylindrically symmetric detector system consisting of two layers of double sided Si-micro-strip modules that are surrounded by 16 rows of 12 pure CsI crystals (13 x 17.5 x 17 mm^3). This paper gives a brief overview of the experiment, the detector system, and event reconstruction. Reference 1. M. Amoretti et al., Nature 419, 456 (2002).

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