High Resolution Beam Profile Monitors in the SLC

In the SLC linac, low emittance beams with typical transverse dimensions less than 0.2 mm must be accelerated without effective emittance growth. In order to monitor this we have installed a high resolution beam profile monitor system which consists of an aluminum target covered with a fine-grained...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 1985-10, Vol.32 (5), p.2003-2005
Main Authors: Ross, M. C., Seeman, J. T., Jobe, R. K., Sheppard, J. C., Stiening, R. F.
Format: Article
Language:English
Subjects:
Acceleration
Aluminum
Cameras
Linear particle accelerator
Optical recording
Particle beams
Phosphors
Signal resolution
Stimulated emission
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Summary:In the SLC linac, low emittance beams with typical transverse dimensions less than 0.2 mm must be accelerated without effective emittance growth. In order to monitor this we have installed a high resolution beam profile monitor system which consists of an aluminum target covered with a fine-grained phosphor, a magnifying optical system, a television camera and video signal recording electronics. The image formed when the beam strikes the phosphor screen is viewed on a CRT monitor at the console and selected horizontal and vertical slices of the beam spot intensity are recorded. A 20 MHz transient waveform recorder is used to sample and digitize the raw video signal along the selected slice. The beam width is determined by fitting the background subtracted data to a Gaussian. Beam spots less than 6 × 3 mm can be viewed. Beam spot sizes σx,y < 80μm have been measured.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.1985.4333795