Recent Progress on the ATHENA Positron Accumulator
Abstract
The Positron Accumulator for the ATHENA anti-hydrogen experiment at CERN, Geneva has recently been upgraded with a new 50 mCi(22)Na Beta(+)-radioactive source. Following this, rapid progress has been made in optimizing and characterizing the properties of the positron plasma. The rotating wall technique has also been implemented in the accumulation region and has been shown to lead to compression of better than a factor of 10 in density and markedly increased lifetimes, even when using the N2 buffer gas as a cooling gas. Using these techniques we have routinely accumulated up to 2 x 10(exp8) positrons in a few minutes. The positron plasma has a FWHM of only 3-4 mm when using the rotating wall which compares with a FWHM of 15 mm without the rotating wall.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 24, 2002
- Accession Number
- ADP012492
Entities
People
- D. P. Van Der Werf
- L. V. Jorgensen
- M. Charlton
- M. J. Collier
- T. L. Watson
Organizations
- Swansea University