Spatial Distribution of Cold Antihydrogen Formation
- 27 January 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 94 (3) , 033403
- https://doi.org/10.1103/physrevlett.94.033403
Abstract
Antihydrogen is formed when antiprotons are mixed with cold positrons in a nested Penning trap. We present experimental evidence, obtained using our antihydrogen annihilation detector, that the spatial distribution of the emerging antihydrogen atoms is independent of the positron temperature and axially enhanced. This indicates that antihydrogen is formed before the antiprotons are in thermal equilibrium with the positron plasma. This result has important implications for the trapping and spectroscopy of antihydrogen.Keywords
This publication has 21 references indexed in Scilit:
- The ATHENA antihydrogen apparatusNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2004
- High rate production of antihydrogenPhysics Letters B, 2003
- Positron Plasma Diagnostics and Temperature Control for Antihydrogen ProductionPhysical Review Letters, 2003
- A cryogenic silicon micro-strip and pure-CsI detector for detection of antihydrogen annihilationsNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2003
- Background-Free Observation of Cold Antihydrogen with Field-Ionization Analysis of Its StatesPhysical Review Letters, 2002
- Production and detection of cold antihydrogen atomsNature, 2002
- Measurement of the Hydrogen-Transition Frequency by Phase Coherent Comparison with a Microwave Cesium Fountain ClockPhysical Review Letters, 2000
- The Antiproton Decelerator: ADHyperfine Interactions, 1997
- Two-Photon Spectroscopy of Trapped Atomic HydrogenPhysical Review Letters, 1996
- Antihydrogen production using trapped plasmasPhysics Letters A, 1988