A laser-based beam profile monitor for the SLC/SLD interaction region

Beam size estimates made using beam-beam deflections are used for optimization of the Stanford Linear Collider (SLC) electron-positron beam sizes. Typical beam sizes and intensities expected for 1996 operations are 2.1 × 0.6 μm ( x, y) at 4.0 × 10 10 particles per pulse. Conventional profile monitor...

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Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 1996-09, Vol.379 (3), p.363-365
Main Authors: Alley, R, Arnett, D, Bong, E, Colocho, W, Frisch, J, Horton-Smith, S, Inman, W, Jobe, K, Kotseroglou, T, McCormick, D, Nelson, J, Scheeff, M, Wagner, S, Ross, M.C
Format: Article
Language:English
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Summary:Beam size estimates made using beam-beam deflections are used for optimization of the Stanford Linear Collider (SLC) electron-positron beam sizes. Typical beam sizes and intensities expected for 1996 operations are 2.1 × 0.6 μm ( x, y) at 4.0 × 10 10 particles per pulse. Conventional profile monitors, such as scanning wires, fail at charge densities well below this. The laser-based profile monitor uses a finely-focused 350-nm wavelength tripled YLF laser pulse that traverses the particle beam path about 29 cm away from the e +/e − IP. Compton scattered photons and degraded e +/e − are detected as the beam is steered across the laser pulse. The laser pulse has a transverse size of 380 nm and a Rayleigh range of about 5 μm.
ISSN:0168-9002
1872-9576
DOI:10.1016/0168-9002(96)00556-6