Bochum 1998 – scientific programme
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HK: Hadronen und Kerne
HK 56: Postersitzung
HK 56.57: Poster
Wednesday, March 18, 1998, 17:00–19:00, Foyer
A Detector system for the Observation of Cold Antihydrogen at AD/CERN — •M. Hofmann1 and Atrap2 — 1FZ-Juelich, IKP 1 — 2
The production process of cold antihydrogen can be broken into seven steps:
decelerating the p in the Antiproton Decelerator (AD) to about 6 MeV,
slowing down the p in matter from 6 MeV to below 3 keV, electron
cooling of the trapped p, stacking of p, demonstrating a long
lifetime, slowing down e+ from a radioactive source, and let the e+ and
p recombine to H0.
The first goal of the experiment is to produce cold H0 atoms.
In order to do this the annihilation products of H0 must be
detected and the vertex must be reconstructed.
The H0 - detector will consist of several concentric layers of
cylindrical shapes with a hole for the trap in its centre. The outer layer will
be subdivided in 32 segments BGO crystals detecting the 511 keV gammas. The
vertex detector for the p annihilation products will consist of one
ring of Si-micro strips fixed closest to the trap and three rings of
scintillating fibres having each again three layers with different
orientations.