SEM-7B secondary electron multiplier with 25 mm active area diameter is intended for the detection of particulate and other short-wavelength electromagnetic radiation fluxes as part of scientific and industrial equipment, including space instruments.
Rimmed microchannel plates 25-10A MCPs with 33 mm overall diameter, 25 mm active area diameter and 10 µm channel diameter are used in this device.
Specification
Schematic diagram
Basic parameters
Parameter, unit
Value
min
max
Supply voltage at ≥ 1×107 gain, V
2300
Single electron pulse height resolution, %
120
Dark count rate density, count/sec×cm2
3
Overall dimensions
Parameter
Unit
Value
Maximum diameter
mm
50
Input window area
cm2
5
Reference data
Parameter
Unit
Value
Pulse leading edge rise time
ns
0.6–0.7
Full width at half maximum (FWHM)
ns
1.5–2
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