Avalanche transistor pulser for fast-gated operation of micro-channel plate image-intensifiers

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Transistors operated in the avalanche mode are employed to generate a 1000 volt 10 to 30 nsec wide pulse with less than 4 nsec rise and fall times. This pulse is resistively attenuated to approximately equal to 270 volts and drives the image intensifier tube which is a load of approximately equal to 200 pf. To reduce stray inductance and capacitance, transistor chips were assembled on a thick-film hybrid substrate. Circuit parameters, operating conditions, and coupling to the microchannel plate image-intensifier (MCPI/sup 2/) tube are described. To provide dc operating voltages and control of transient voltages on the MCPI/sup 2/ … continued below

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8 pages

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Lundy, A.; Parker, J. R.; Lunsford, J. S. & Martin, A. D. January 1, 1977.

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Transistors operated in the avalanche mode are employed to generate a 1000 volt 10 to 30 nsec wide pulse with less than 4 nsec rise and fall times. This pulse is resistively attenuated to approximately equal to 270 volts and drives the image intensifier tube which is a load of approximately equal to 200 pf. To reduce stray inductance and capacitance, transistor chips were assembled on a thick-film hybrid substrate. Circuit parameters, operating conditions, and coupling to the microchannel plate image-intensifier (MCPI/sup 2/) tube are described. To provide dc operating voltages and control of transient voltages on the MCPI/sup 2/ tube a resistance-capacitance network has been developed which (a) places the MCPI/sup 2/ output phosphor at ground, (b) provides programmable gains in ''f-stop'' steps, and (c) minimizes voltage transients on the MCPI/sup 2/ tube.

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8 pages

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Dep. NTIS, PC A02/MF A01.

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  • Nuclear science symposium, San Francisco, CA, USA, 19 Oct 1977

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  • Report No.: LA-UR-77-2402
  • Report No.: CONF-771023-6
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5188712
  • Archival Resource Key: ark:/67531/metadc1056330

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1977

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  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 24, 2021, 8:56 p.m.

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Lundy, A.; Parker, J. R.; Lunsford, J. S. & Martin, A. D. Avalanche transistor pulser for fast-gated operation of micro-channel plate image-intensifiers, article, January 1, 1977; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1056330/: accessed June 8, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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