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Main:  Electric vacuum devices:  Electric Vacuum Devices for Detectors and Image Cameras

  ELECTRIC VACUUM DEVICES FOR DETECTORS AND IMAGE CAMERAS
 

Vacuum photocells and photomultiplier tubes, which are being developed by Research & Production Center for Pulse Technique under FSUE "VNIIA", are notable for high temporal resolution, record values of output linear current, wide range of spectral response (from 300 to 800 nm).

Vacuum photocells

Vacuum photocells are intended for measurement of pulsed light fluxes of radiation with wide range of spectral response (from 300 nm to 650 nm), high temporal resolution of 0.1÷1.0 ns and linear current in pulse mode (from 2.5 A to 11 A). Based on vacuum photocells, scintillation neutron and gamma radiation detectors of low sensitivity of 10-20÷10-16 A cm2 s/quantum are developed in the institute and are being supplied.

Technical Characteristics of Vacuum Photocells
 
Name of Characteristic 15 20 21
Spectral response range, nm 300-650 350-650 300-650
Photocathode type Sb - Cs Sb - Cs Sb - Cs
Photocathode diameter, mm 25 50 12
Luminous photocathode sensitivity, µA/lm, no less than 25 20 20
Max linear current in pulse mode, A, no less than 11.0 8.0 2.5
Dark current, nA, no more than 0.1 0.1 0.05
Time response (FWHM), ps, no more than 500 1000 100
Supply voltage, kV 1.8 1.8 1.5
Dimensions: diameter, mm
                   height, mm
40
40
92
85
30
30
 15  20  21
15 20 21

Photomultiplier tubes

Photomultiplier tubes are intended for registration of low-level pulsed fluxes of radiation in ultraviolet, visible and infrared spectra within the range of 300÷800 nm, with amplification of 102÷107, with linear current in pulse mode of 0.15÷2.5 A and high temporal resolution of 0.5÷5 ns. Based on photomultiplier tubes, scintillation detectors with sensitivity of 10-16÷10-9 A cm2 s/quantum used in measurement of ionizing radiation fluxes are developed in the institute and are being supplied.

Technical Characteristics of Photomultiplier tubes
 
Name of Characteristic 3 5 18 20 21 22
Spectral response range, nm 350-650 350-650 300-650 350-650 300-800 350-650
Photocathode type Sb - Cs Sb - Cs Sb - Cs Sb - Cs Sb-K-Na-Cs Sb - Cs
Photocathode diameter, mm 50 50 50 50 50 50
Luminous photocathode sensitivity, µA/lm 20 20 25 20 120 20
Anode sensitivity, A/lm 50-400 0.5-10 4-160 no less than 30 no less than 5 0.005-0.020
Max linear current in pulse mode, A, no less than 2.5 2.5 0.5 0.15 1.5 1.5
Dark current, µA, no more than 0.7 0.7 0.7 0.7 0.7 0.05
Time response (FWHM), ns 5.0 5.0 1.0 0.5 1.7 5.0
Supply voltage, kV 4.0 3.4 6.8 6.8 6.8 4.0
Dimensions: diameter, mm
                   height, mm
91
177
91
157
91
200
91
200
91
200
91
140
3, 5 22
3, 5 22
18 20
18 20

Image Tubes

Streak image tubes developed in Research & Production Center for Pulse Technique under FSUE "VNIIA" are intended for registration of space-time characteristics of pulsed fluxes of optical radiation. Image tubes have spectral range of radiation registration within 220÷1060 nm, temporal resolution of 1÷20 ps, spatial resolution of 10÷30 lp/mm, registration dynamic range of 100÷1000 (depending on temporal resolution). Based on streak image tubes, the institute produces image cameras used in research of fast processes in a scale of time intervals from picosecond intervals to millisecond ones.

Technical Characteristics of Image Tubes
 
Name of Characteristic 9 9-01 20 21 22 23 25 26
Spectral range, nm 350-800 350-650 350-650 220-800 350-1060 350-1060 350-1060 350-1060
Input window material 52-1 52-1 52-1 -49 52-1 52-1
Photocathode type SbKNaCs SbKCs SbKCs SbKNaCs AgOCs AgOCs AgOCs AgOCs
Spectral response, mA/W 3
(800)
15
(428)
10
(428)
1
(260)
0.1
(1060)
0.05
(1060)
0.07
(1060)
0.03
(1060)
Photocathode size, mm 315 315 310 315 315 310 315 310
Screen size, mm 1734 1734 2435 1734 1734 2535 1734 2535
Magnification 1+0.3 1+0.3 2+0.5 1+0.3 1+0.3 2+0.5 1+0.3 2+0.5
Spatial resolution, lp/mm 9 9 30 9 9 30 8 25
Temporal resolution, ps 20 20 1 20 20 1 20 3
Supply voltage, kV 15.0 15.0 10.0 15.0 15.0 10.0 15.0 10.0
9, 9-01, 21, 22, 25 20, 23, 26
9, 9-01, 21, 22, 25 20, 23, 26

As well, in Research & Production Center for Pulse Technique X-ray streak cameras were developed and are being produced to record short pulses of X-ray radiation of simulating apparatuses in the quanta energy range of 0.1÷40 keV with temporal resolution of 20÷40 ps.

Technical Characteristics of X-ray Image Tubes
 
Name of Parameter 3 4 7
Spectral range, keV 1.5-30 0.1-10 0.1-10
Focusing type Electrostatic Electrostatic Electrostatic
Input window material, thickness Mica, 5 µm P/propylene, 1 µm P/propylene, 1 µm
Photocathode material, thickness CsJ Au, 30 nm Au, 30 nm
Photocathode size, mm 112 0.0815 115
Screen size, mm 1535 1035 1835
Electron-optical magnification 1.2 1.0 1.0-1.5
Spatial resolution, lp/mm 10 5 10
Temporal resolution, ps 20 40 20
Supply voltage, kV 15.0 15.0 15.0
3 7
3 7

 
© FSUE "VNIIA", 2002-2015