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The Lick Observatory image-dissector scanner.A scanner that uses an image dissector to scan the output screen of an image tube has proven to be a sensitive and linear detector for faint astronomical spectra. The image-tube phosphor screen acts as a short-term storage element and allows the system to approach the performance of an ideal multichannel photon counter. Pulses resulting from individual photons, emitted from the output phosphor and detected by the image dissector, trigger an amplifier-discriminator and are counted in a 24-bit, 4096-word circulating memory. Aspects of system performance are discussed, giving attention to linearity, dynamic range, sensitivity, stability, and scattered light properties.
Document ID
19720042025
Document Type
Reprint (Version printed in journal)
Authors
Robinson, L. B.
Wampler, E. J.
(Lick Observatory Santa Cruz, Calif., United States)
Date Acquired
August 6, 2013
Publication Date
February 1, 1972
Subject Category
Instrumentation And Photography
Accession Number
72A25691
Funding Number(s)
CONTRACT_GRANT: NGL-05-061-008
CONTRACT_GRANT: NSF GP-29684
CONTRACT_GRANT: NGR-05-061-006
Distribution Limits
Public
Copyright
Other

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