AN EFFICIENT POSITION-SENSITIVE DETECTOR FOR 3-30 KEV POSITRONS AND ELECTRONS

Authors
SCHMIDT PV WILLMANN L ABELA R BAGATURIA J BERTL W BRAUN B FOLGER H JUNGMANN K MZAVIA D PUTLITZ GZ RENKER D SAKHELASHVILLI T ZHANG L
Citation
Pv. Schmidt et al., AN EFFICIENT POSITION-SENSITIVE DETECTOR FOR 3-30 KEV POSITRONS AND ELECTRONS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 376(1), 1996, pp. 139-145
Citations number
17
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
376
Issue
1
Year of publication
1996
Pages
139 - 145
Database
ISI
SICI code
0168-9002(1996)376:1<139:AEPDF3>2.0.ZU;2-C
Abstract
A position sensitive detector for 3-30 keV positrons and electrons has been developed which consists of a pair of microchannel plates (MCP) in Chevron configuration and resistive anode readout. The device has a n active diameter of 75 mm and can be operated in axial magnetic field s up to several kG. The detection efficiency of MCP devices is 16(2)% for positrons in the 10 keV region. With a thin carbon (C) foil of 25 mu g/cm(2) thickness carrying a 15 mu g/cm(2) magnesium oxide (MgO) co ating acting as additional secondary electron emitter, the efficiency could be increased to 64(2)% in the energy range 5-12 keV. A two-dimen sional position resolution of 0.55(3) mm (FWHM) and a timing resolutio n of better than 1 ns could be achieved.