MOPM2HA03
RIKEN, Japan
[1] N. Kuroda, H. A. Torii, K. Y. Franzen, et al., PRL 94, (2005)
[2] A. Mohri and Y. Yamazaki, Europhys. L 63 (2003) 207
[3] Y. Enomoto, N. Kuroda, K. Michishio, et al., PRL 105 (2010)
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MOPM2HA03 |
Towards the Production of Anti-hydrogen Beams | |
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In the Antiproton Decelerator (AD) at CERN, low energy antiproton beams of 5.6 MeV are delivered to physics experiments. With the use of the unique RFQ decelerator (RFQD), the ASACUSA collaboration is capable of providing ~100 keV pulsed antiproton beams. These antiprotons are further cooled in the MUSASHI [1] trap and finally transferred with an energy of a couple eV to the CUSP experiment. Here, Antihydrogen atoms are produced by mixing an antiproton plasma with a positron plasma in a nested trap scheme. Behind this mixing region a so-called CUSP field is located [2], which focuses low-field anti-hydrogen atoms further downstream to the spinflip cavity followed by a sextupole magnet and antihydrogen detector. A measurement of the antihydrogen signal as a function of the frequency irradiated to the cavity gives direct access to the hyperfine structure (HFS). A detailed comparison with the hydrogen HFS provides a sensitive test of matter/antimatter symmetry. Recently, the production of low energy anti-hydrogen atoms in the CUSP trap was reported [3]. Recent results, development and the current status of the CUSP experiment will be reported with the emphasis on non-neutral plasmas.
[1] N. Kuroda, H. A. Torii, K. Y. Franzen, et al., PRL 94, (2005) [2] A. Mohri and Y. Yamazaki, Europhys. L 63 (2003) 207 [3] Y. Enomoto, N. Kuroda, K. Michishio, et al., PRL 105 (2010) |
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Slides MOPM2HA03 [4.417 MB] | |