Journal article 1202 views
Compression of positron clouds using rotating wall electric fields
,
Aled Isaac
Hyperfine Interactions, Volume: 212, Issue: 1-3, Pages: 125 - 132
Swansea University Authors:
Dirk van der Werf , Aled Isaac
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DOI (Published version): 10.1007/s10751-011-0384-7
Abstract
An asymmetric dipolar rotating electric field can be used to compress a trapped cloud of positrons when applied with a frequency close that of their axial bounce, and in the presence of a low pressure molecular gas to provide cooling. Measurements of the compression rate and associated parameters ar...
| Published in: | Hyperfine Interactions |
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| ISSN: | 0304-3843 1572-9540 |
| Published: |
2012
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa13702 |
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| Abstract: |
An asymmetric dipolar rotating electric field can be used to compress a trapped cloud of positrons when applied with a frequency close that of their axial bounce, and in the presence of a low pressure molecular gas to provide cooling. Measurements of the compression rate and associated parameters are presented and compared with results of a theory we have developed. The latter treats positron behaviour in a perfect Penning trap potential, in the presence of the rotating field, with the cooling modelled in the Stokes viscous drag approximation. Good agreement between the theory and experiment has been found, which has allowed us to identify the phenomenon as a new form of sideband cooling. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
1-3 |
| Start Page: |
125 |
| End Page: |
132 |