HIGH-EFFICIENCY MOLECULAR-BEAM IONIZATION DETECTOR WITH SHORT IONIZATION REGION

Authors
KUHNKE K KERN K DAVID R COMSA G
Citation
K. Kuhnke et al., HIGH-EFFICIENCY MOLECULAR-BEAM IONIZATION DETECTOR WITH SHORT IONIZATION REGION, Review of scientific instruments, 65(11), 1994, pp. 3458-3465
Citations number
19
Categorie Soggetti
Physics, Applied","Instument & Instrumentation
Journal title
Review of scientific instruments → ACNP
ISSN journal
00346748
Volume
65
Issue
11
Year of publication
1994
Pages
3458 - 3465
Database
ISI
SICI code
0034-6748(1994)65:11<3458:HMIDWS>2.0.ZU;2-5
Abstract
A mass selective electron-impact ionization detector for use in energy resolved thermal He scattering experiments is presented. The detector combines a short effective ionization region (approximately 3 mm FWHM ) with a high detection efficiency of 10(-5) at 2 mA electron emission . An efficiency of 10(-4) at 10 mA emission current can be achieved if time resolution below 20 mus is dispensable. The design is discussed and measurements of detection efficiency and time resolution are prese nted. The ionizer can likewise be employed for an efficient detection of other types of atoms or molecules.