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A probe for real-time images of particle beams and their analyses in a merged-beams apparatusA real-time charged particle beam probe was developed, which can be used both as a beam diagnostic (beam tuning) and to quantitatively determine the three-dimensional density distribution of a beam. The probe consists of a microchannel plate, an aluminized phosphor screen deposited on a fiber-optic faceplate, a flexible fiber-optic bundle, and a charge injection device (CID) in tandem. Digital or analog video output of the CID is fed into a computer or oscilloscope, respectively, for analysis or observation. The probe can be moved continuously along the beams' paths to obtain 'pictures' of the beam at any desired interval, thus giving three-dimensional form factors. The beams, singly or simultaneously, may be observed on the monitor facilitating the task of beam adjustment for optimum overlap. The digital output is used for quantitative computation of the beam overlaps. The device is linear with beam intensity, but the performance degrades with time due to beam damage of the microchannel plate.
Document ID
19910030141
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Forand, J. L.
(Joint Inst. for Lab. Astrophysics Boulder, CO, United States)
Wahlin, E.
(Joint Inst. for Lab. Astrophysics Boulder, CO, United States)
Depaola, B. D.
(Joint Inst. for Lab. Astrophysics Boulder, CO, United States)
Dunn, G. H.
(Joint Institute for Laboratory Astrophysics Boulder, CO, United States)
Timmer, C.
(JPL, Pasadena, CA; Joint Institute for Laboratory Astrophysics, Boulder CO, United States)
Date Acquired
August 15, 2013
Publication Date
November 1, 1990
Publication Information
Publication: Review of Scientific Instruments
Volume: 61
ISSN: 0034-6748
Subject Category
Instrumentation And Photography
Accession Number
91A14764
Distribution Limits
Public
Copyright
Other

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