Absolute detection efficiencies of microchannel plates for 0. 1--2. 3 keV electrons and 2. 1--4. 4 keV Mg ions
The absolute detection efficiencies of detectors consisting of two microchannel plates (MCP) in a chevron arrangement, were experimentally determined for 0.1--2.3-keV electrons and 2.1--4.4-keV Mg ions. Both detectors tested included a grid with 92.5% transmission in front of the first MCP. For the measurements, the observed detector count rates were compared to the corresponding particle currents collected in a Faraday cup and measured with a vibrating reed electrometer. The electron detection efficiency of the MCP detector, including the grid, decreases from 0.82 at 0.1 keV to 0.65 at 2.3 keV for electrons incident normal to the surface. The Mg ion detection efficiency for the same arrangement, but with 43 incidence angle, increases from 0.49 at 2.1 keV to 0.81 at 4.4 keV.
- Research Organization:
- Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, Boulder, Colorado 80309-0440
- OSTI ID:
- 6188601
- Journal Information:
- Rev. Sci. Instrum.; (United States), Vol. 57:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRON DETECTION
POSITION SENSITIVE DETECTORS
ION DETECTION
EFFICIENCY
EV RANGE 100-1000
EXPERIMENTAL DATA
FABRICATION
KEV RANGE 01-10
MAGNESIUM IONS
CHARGED PARTICLE DETECTION
CHARGED PARTICLES
DATA
DETECTION
ENERGY RANGE
EV RANGE
INFORMATION
IONS
KEV RANGE
MEASURING INSTRUMENTS
NUMERICAL DATA
RADIATION DETECTION
RADIATION DETECTORS
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments