REGISTRATION SYSTEM FOR AN ION MICROPROBE

Authors
TOLSTOGUZOV AB MAMONTOV EV
Citation
Ab. Tolstoguzov et Ev. Mamontov, REGISTRATION SYSTEM FOR AN ION MICROPROBE, Instruments and experimental techniques, 39(5), 1996, pp. 723-726
Citations number
14
Categorie Soggetti
Instument & Instrumentation",Engineering
Journal title
Instruments and experimental techniques → ACNP
ISSN journal
00204412
Volume
39
Issue
5
Year of publication
1996
Pages
723 - 726
Database
ISI
SICI code
0020-4412(1996)39:5<723:RSFAIM>2.0.ZU;2-4
Abstract
A universal registration system is described that provides measurement s in the positive and negative ion counting mode in a dynamic range of 10(6), based on a VEU-7 secondary-electron multiplier and a specially designed wide-band amplifier (frequency bandwidth >200 MHz; voltage-c harge transmission coefficient is 10(13) V/C). In the positive ion det ection mode, the dynamic range can be increased to 10(8) by using high -rate commutation from the counting to analog-digital regimes of signa l detection based on a current-frequency converter (transmission coeff icient 300 Hz/nA in the 10(-6) to 10(-9) A range).