Abstract
A pulsing system of a slow positron beam has been developed to measure positron lifetime for thin films. The pulsing apparatus consists of positron storage section, chopper and bunching section. The storage section reduces the energy spread and makes a quasi-continuous beam. Positrons are bunched by suitable time-varying voltage which is produced by an arbitrary waveform generator and amplified. The time width of bunched positrons has reached ∼550 ps (FWHM) with positron mean energy of ∼100 eV at present.
Original language | English |
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Pages (from-to) | 664-666 |
Number of pages | 3 |
Journal | Materials Science Forum |
Volume | 363-365 |
DOIs | |
Publication status | Published - 2001 |
Externally published | Yes |
Event | 12th International Conference on Positron Annihilation - Munchen, Germany Duration: 2000 Aug 6 → 2000 Aug 12 |
Keywords
- Lifetime
- Linac
- Pulse
- Slow positron beam
- Storage
- Stretching
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering