Ge and 
Na sourcesMaekawa, Masaki; Fukaya, Yuki 
; Zhang, H.; Li, H.; Kawasuso, Atsuo
Spin polarizations of electrostatic positron beams generated using a Ge and a Na sources with tungsten moderators were 47% and 30%, respectively. A comparable spin polarization (27%) was obtained with much reduced beam diameter (0.5 mm), when electromagnetic lenses, a Na source and a tungsten moderator were used. Replacing the tungsten moderator with a solid neon moderator in this system, the beam flux was significantly enhanced with maintaining the spin polarization. The Doppler broadening of annihilation radiation spectra of polycrystalline Fe measured using the above beams showed clear asymmetry upon field reversal.
Language |
: | English |
|---|---|---|
Journal |
: | |
Volume |
: | 505 |
Number |
: | |
Pages |
: | p.012033_1 - 012033_4 |
Publication Year/Month |
: | 2014/04 |
Meeting title |
: | 13th International Workshop on Slow Positron Beam Techniques and Applications (SLOPOS-13) |
Held date |
: | 2013/09 |
Location (city) |
: | Munich |
Location (country) |
: | Germany |
Paper URL |
: |
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