SPOT IL - Slow positron facility in Israel
Name
P_Or___SPOT_IL__AIP_Conference_Proceedings__V3.pdf
Description
Accepted version
Size
653.57 KB
Format
Adobe PDF
Checksum (MD5)
5c9ac2d4de84d87e63882a02d74535f5
Author(s)
Or, P.
Dribin, D.
Cohen, D.
Erlichman, G.
Cohen, E.
Hen, Or
Piasetzky, E.
Sabo-Napadensky, I.
Steinberg, H.
Beck, S. May-Tal
Date Issued
December 2019
Journal
AIP Conference Proceedings
Publisher
AIP Publishing
Citation
Or, P. et al. "SPOT IL - Slow positron facility in Israel." 18TH INTERNATIONAL CONFERENCE ON POSITRON ANNIHILATION (ICPA-18): Positron Annihilation Spectroscopy-Fundamentals, Techniques ad Applications, AIP Conference Proceedings, 2182, AIP Publishing, 2019, 040009. © 2019 Author(s)
Version
Author's final manuscript
Abstract
A slow positron facility is being built in Israel, at the Hebrew University, for basic and applied research. It consists of a slow positron beam and a compact Positrons Annihilation Lifetime (PAL) spectrometer. The slow positron beam follows a traditional design, using a 22Na source, of about 40mCi, a Tungsten moderator and a unique grounded target cell, with positrons energy that can vary between 0.03 keV and 30 keV. The detection system will be comprised of High Purity Germanium and BaF2 detectors, facing each other, for low background Doppler Broadening (DB) measurements. The target cell is designed to allow a combined measurement of sample conductivity and DB, with the flexibility to add more detection options in the future. The compact PAL spectrometer includes two fast scintillation detectors read by a fast digitizer (DRS4), with a sampling rate of 5.12 GS/s. A dedicated software package was developed to emulate analogue data acquisition. Lifetime measurements were performed using a ∼25 μCi 22Na source. The time resolution was defined using a 60Co source, to be 180-200ps. First positron lifetime validation measurements of Ti resulted in positrons lifetime of 157 ± 4 ps, consistent with previously published values.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1063/1.5135841
