| Autor: |
Masaru Takao, I. S. Voronchev, A. V. Kiselev, N. Kumagai, S. Daté, H. Kamitsubo, A. Ando, G.N. Kulipanov, Kouichi Soutome, Y. Miyahara, T. Nakamura, A.N. Skrinsky, N.A. Mezentsev, V. N. Belyaev, Hitoshi Tanaka |
| Rok vydání: |
1996 |
| Předmět: |
|
| Zdroj: |
Journal of Synchrotron Radiation. 3:201-206 |
| ISSN: |
0909-0495 |
| DOI: |
10.1107/s090904959600605x |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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