IMPROVEMENT IN THE ION-DETECTION SENSITIVITY OF THE PRESSURE MEASUREMENT METHOD USING NONRESONANT LASER IONIZATION

Authors
KOKUBUN K ICHIMURA S HIRATA M SEKINE S KUROKAWA A
Citation
K. Kokubun et al., IMPROVEMENT IN THE ION-DETECTION SENSITIVITY OF THE PRESSURE MEASUREMENT METHOD USING NONRESONANT LASER IONIZATION, Vacuum, 48(7-9), 1997, pp. 727-729
Citations number
8
Categorie Soggetti
Physics, Applied","Material Science
Journal title
Vacuum → ACNP
ISSN journal
0042207X
Volume
48
Issue
7-9
Year of publication
1997
Pages
727 - 729
Database
ISI
SICI code
0042-207X(1997)48:7-9<727:IITISO>2.0.ZU;2-#
Abstract
In order to increase the ion-detection efficiency of pressure measurem ent using nonresonant laser ionization method, a Channeltron of apertu re 19 mm was used in the ion-detection head and pressure measurement w as carried out with H-2. The defection efficiency was increased about 1.5 times compared to a previous result. The volume of the ionization region estimated from the present measurement, 5.8 x 10(-4) mm(3), is close to that derived from the direct observation of the ion distribut ion in the ionization region, 6.4 x 10(-4) mm(3). (C) 1997 Elsevier Sc ience Ltd.