Published October 15, 1987 | Version v1
Journal article Metadata-only

Detector for metastable helium ions

Creators

  • 1. Princeton Univ., NJ (USA). Joseph Henry Labs.

Description

We describe a sensitive detector for metastable (2S1/2)helium ions. The detector operates in a magnetic field of 4-16 kG and has on overall efficiency of about 1%. Metastable He+ ions are quenched in an electric field causing them to decay to the ground state (1S1/2) with emission of 304 A radiation. The radiation is detected in a cylindrical photodiode whose active surfaces are made of copper foils coated with MgF2. Multiple photocathodes are used in an arrangement which maximizes the overall efficiency. (orig.)

Additional details

Publishing Information

Journal Title
Nucl. Instrum. Methods Phys. Res., Sect. A
Journal Volume
260
Journal Issue
2/3
Series
Nucl. Instrum. Methods Phys. Res., Sect. A.
Journal Page Range
403-406
ISSN
0168-9002
CODEN
NIMAE

INIS

Country of Publication
Netherlands
Country of Input or Organization
Netherlands
INIS RN
19023930
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Descriptors DEI
DE-EXCITATION; EFFICIENCY; HELIUM IONS; ION DETECTION; MAGNETIC FIELDS; METASTABLE STATES; PERFORMANCE; PHOTODIODES; RADIATION DETECTORS
Descriptors DEC
CHARGED PARTICLE DETECTION; CHARGED PARTICLES; DETECTION; ENERGY LEVELS; ENERGY-LEVEL TRANSITIONS; EXCITED STATES; IONS; MEASURING INSTRUMENTS; RADIATION DETECTION; SEMICONDUCTOR DEVICES; SEMICONDUCTOR DIODES