Production of Intense Low-Energy Positron Beams with Synchrotron Radiation
書誌事項
- 公開日
- 1996-09-01
- 権利情報
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- http://journals.iucr.org/services/copyrightpolicy.html
- http://journals.iucr.org/services/copyrightpolicy.html#TDM
- DOI
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- 10.1107/s090904959600605x
- 公開者
- International Union of Crystallography (IUCr)
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説明
A low-energy positron beam is a unique probe of Fermi surfaces, defects, surfaces and interfaces. In high-energy electron and positron storage rings (E > 6 GeV) it is possible to generate intense synchrotron radiation with 1-3 MeV photons by installing a high-field superconducting wiggler. The strength of the wiggler should be ~8-12 T. High-energy photons are emitted from the wiggler and converted to low-energy positrons by using a suitable target-moderator system. For an 8 GeV electron storage ring at a beam current of 100 mA, final yields are estimated to be ~10(10)-10(12) (slow-e(+) s(-1)) with the size of positron source ~10(2)-10(3) cm(2). The possibility of increasing the brightness of the low-energy positron beam is discussed. Advantages of using synchrotron radiation for producing positrons are pointed out. The effect of a superconducting wiggler on the stored electron beam is also discussed.
収録刊行物
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- Journal of Synchrotron Radiation
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Journal of Synchrotron Radiation 3 (5), 201-206, 1996-09-01
International Union of Crystallography (IUCr)