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Title: Positron identification in APEX

Abstract

The trigger which signals than an event of interest has occurred in APEX is based on the identification of back-to-back 511 keV positron annihilation radiation. The gamma rays are detected in 24- element position sensitive NaI(Tl) barrels which surround each silicon array. The gamma-ray information gives positron identification and allows the reconstruction of the location of the decaying positron on the silicon array. The principle of operation, design and performance will he presented including the energy, time and position resolutions. Examples of in-beam data show the successful suppression of false triggers from room background and beam-induced radiation, resuIting in the unambiguous identification and location of reaction positrons and the clean separation of positrons from the copious background of delta electrons.

Authors:
Publication Date:
OSTI Identifier:
386991
Report Number(s):
CONF-931044-
Journal ID: BAPSA6; ISSN 0003-0503; TRN: 96:026929
Resource Type:
Journal Article
Journal Name:
Bulletin of the American Physical Society
Additional Journal Information:
Journal Volume: 38; Journal Issue: 9; Conference: Fall meeting of the Division of Nuclear Physics of the American Physical Society, Pacific Grove, CA (United States), 20-23 Oct 1993; Other Information: PBD: Oct 1993
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 43 PARTICLE ACCELERATORS; SI SEMICONDUCTOR DETECTORS; TRIGGER CIRCUITS; POSITRON DETECTION; DESIGN; ATLAS SUPERCONDUCTING LINAC; PARTICLE IDENTIFICATION; GAMMA DETECTION

Citation Formats

Kaloskamis, N I. Positron identification in APEX. United States: N. p., 1993. Web.
Kaloskamis, N I. Positron identification in APEX. United States.
Kaloskamis, N I. 1993. "Positron identification in APEX". United States.
@article{osti_386991,
title = {Positron identification in APEX},
author = {Kaloskamis, N I},
abstractNote = {The trigger which signals than an event of interest has occurred in APEX is based on the identification of back-to-back 511 keV positron annihilation radiation. The gamma rays are detected in 24- element position sensitive NaI(Tl) barrels which surround each silicon array. The gamma-ray information gives positron identification and allows the reconstruction of the location of the decaying positron on the silicon array. The principle of operation, design and performance will he presented including the energy, time and position resolutions. Examples of in-beam data show the successful suppression of false triggers from room background and beam-induced radiation, resuIting in the unambiguous identification and location of reaction positrons and the clean separation of positrons from the copious background of delta electrons.},
doi = {},
url = {https://www.osti.gov/biblio/386991}, journal = {Bulletin of the American Physical Society},
number = 9,
volume = 38,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 1993},
month = {Fri Oct 01 00:00:00 EDT 1993}
}