A Synchrotron Light Fast Camera for EROS*
Date
1991
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
ORCID
Type
Degree Level
Masters
Abstract
Vertical mismatching or mis-steering of the beam at the injection point of the pulse
stretcher ring leads to an emittance growth of the extracted beam with respect to the
injected beam. A mismatched beam shows up as a modulation of the vertical size of the
beam from turn to turn, while a mis-steered beam results in a modulation of the vertical
position of the beam centroid. Simulations indicate that a fast beam profile monitor would
be useful to detect and diagnose the conditions of beam mismatching and mis-steering.
The spatial resolution of the monitor must be about 100 μm to detect beam mis-steering
and about 200 μm to detect beam mismatching in order to keep the emittance growth
below 20%. The monitor must be capable of observing the first four turns of the beam in
the ring to allow detection of non-optimal conditions at injection.
The fast beam profile monitor is a high speed, high resolution SIT Vidicon camera.
The fast camera is triggered by a solid state modulator to meet space restrictions, as well
as gate pulse requirements, of the monitoring system. The camera utilizes optics which
give it a field of view of 1 cm² at a distance of 2.84 meters. Theoretical limitations on the resolution of the fast camera are discussed, as are expected beam behavior for various conditions of beam mismatching prior to, and mis-steering in, the injection line.
The synchrotron light fast camera works well; the resolution attained is near the theoretical limits calculated. While the resolution limits were not measured rigorously, tests with the camera indicated the 100 μm resolution requirement was achieved.
Description
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Citation
Degree
Master of Science (M.Sc.)
Department
Physics
Program
Physics