Radiant energy – With charged particle beam deflection or focussing – With detector
Patent
1993-07-14
1994-12-20
Dzierzynski, Paul M.
Radiant energy
With charged particle beam deflection or focussing
With detector
250207, 313532, H01J 3130
Patent
active
053748263
ABSTRACT:
A focused electron/bombarded (FEB) ion detector comprising an MCP, focusing means, and a collection anode disposed in a detector body. The collector anode includes a diode for receiving the focused output electron beam from the MCP. The gain between the input ion current to the MCP and the detector output signal from the diode is on the order of 1-100 million, depending on the device configuration and applied biasing voltages. A hybrid photomultiplier tube includes a photocathode, a photodiode for collecting and multiplying electrons emitted by the photocathode and providing an output signal and electrodes for focusing the electrons on the photodiode. A vacuum envelope encloses a vacuum region between photocathode and the detector. A conductor disposed on or adjacent to a sidewall of the vacuum envelope reduces the effect of electrical charges on the inside wall of the vacuum envelope on the trajectories of the electrons.
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patent: 3805058 (1974-04-01), Glaenzer
patent: 3885178 (1975-05-01), Goehner
L. K. vanGeest et al, "Hybrid Phototube with Si Target", SPIE, vol. 1449, Elec. Image Tubes & Image Inten. II, 1991, pp. 121-134.
K. C. Schmidt et al, "Con. Channel Elect. Mult. Op. in the Pulse Saturated Mode", IEEE Trans. Nucl. Sci., Jun. 1966, pp. 100-111.
J. P. Edgecumbe et al, "A GaAsP Photocathode with 40% QE at 515nm", SPIE, vol. 1655, Elect. Tubes and Image Inten., Feb. 1992.
K. A. Costello et al, "Transferred Elect. Photocathode with Greater Than 5% Quan. Eff. Beyond One Micron", SPIE, vol. 1449, Elect. Tubes and Image Intensifiers II, 1991.
Aebi Verle W.
Costello Kenneth A.
LaRue Ross A.
Cole Stanley Z.
Dzierzynski Paul M.
Intevac, Inc.
Nguyen Kiet T.
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