The absolute detection efficiency of vacuum electron multipliers, to keV protons and Ar+ ions

Authors
Shchemelinin, S Pszona, S Garty, G Breskin, A Chechik, R
Citation
S. Shchemelinin et al., The absolute detection efficiency of vacuum electron multipliers, to keV protons and Ar+ ions, NUCL INST A, 438(2-3), 1999, pp. 447-451
Citations number
6
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
438
Issue
2-3
Year of publication
1999
Pages
447 - 451
Database
ISI
SICI code
0168-9002(199912)438:2-3<447:TADEOV>2.0.ZU;2-S
Abstract
The single-ion detection efficiency of two types of electron multipliers is provided for incident energies reaching 10 keV. Absolute efficiencies abov e 90% were measured for a discrete dynode electron multiplier (DDEM), in re sponse to Ar+ ions and protons, above an energy of 5 keV. The efficiency to detect protons is consistently higher than that of Ar+ ions, due to a high er secondary electron emission yield. For a channel electron multiplier we have measured a similar maximal detection efficiency for Ar+ ions; though s trongly varying across the detector surface. (C) 1999 Elsevier Science B.V. All rights reserved.