20 research outputs found
Producing Slow Antihydrogen for a Test of CPT Symmetry with ATHENA
The ATHENA experiment at the Antiproton Decelerator facility at CERN aims at testing CPT symmetry with antihydrogen. An overview of the experiment, together with preliminary results of development towards the production of slow antihydrogen are reported.The ATHENA experiment at the Antiproton Decelerator facility at CERN aims at testing CPT symmetry with antihydrogen. An overview of the experiment, together with preliminary results of development towards the production of slow antihydrogen are reported.The ATHENA experiment at the Antiproton Decelerator facility at CERN aims at testing CPT symmetry with antihydrogen. An overview of the experiment, together with preliminary results of development towards the production of slow antihydrogen are reported.The ATHENA experiment at the Antiproton Decelerator facility at CERN aims at testing CPT symmetry with antihydrogen. An overview of the experiment, together with preliminary results of development towards the production of slow antihydrogen are reported
Detection of antihydrogen annihilations with a cryogenic pure-CsI crystal detector
In the framework of the ATHENA experiment a combined tracking and photon detector, operating close to liquid
nitrogen temperatures, was developed to determine simultaneously the vertex of an antiproton annihilation and energy
and direction of photons stemming from a positron annihilation. The photon detector consists of 192 pure-CsI
scintillation crystals (=4 cm3) coupled to 5 x 5 mm2 avalanche photo-diodes, which are read by electronic chips
realised in VLSI CMOS technology. These read out chips are also operational at liquid nitrogen temperature and
feature a self-triggering capability