5 research outputs found
Dynamics of antiproton cooling in a positron plasma during antihydrogen formation
Abstract We demonstrate cooling of 10 4 antiprotons in a dense, cold plasma of ∼10 8 positrons, confined in a nested cylindrical Penning trap at about 15 K. The time evolution of the cooling process has been studied in detail, and several distinct types of behavior identified. We propose explanations for these observations and discuss the consequences for antihydrogen production. We contrast these results with observations of interactions between antiprotons and "hot" positrons at about 3000 K, where antihydrogen production is strongly suppressed
Temperature dependence of anti-hydrogen production in the ATHENA experiment
The ATHENA experiment recently produced the first sample of cold anti-hydrogen atoms by mixing cold plasmas of anti-protons and positrons. The temperature of the positron plasma was increased by controlled RF heating and the anti-hydrogen production rate was measured. Preliminary results are presented. (8 refs)
High rate production of antihydrogen
AbstractWe show that antihydrogen production is the dominant process when mixing antiprotons and positrons in the ATHENA apparatus, and that the initial production rate exceeds 300 Hz, decaying to 30 Hz within 10Â s. A fraction of 65% of all observed annihilations is due to antihydrogen