Characterizing and Optimizing Photocathode Laser Distributions for Ultra-low Emittance Electron Beam Operations

Journal Article · Mon Dec 07 00:00:00 EST 2015 · Physical Review Special Topics - Accelerators and Beams

OSTI ID:1228737

Zhou, F. ^[1]; Bohler, D. ^[1]; Ding, Y. ^[1]; Gilevich, S. ^[1]; Huang, Z. ^[1]; Loos, H. ^[1]; Ratner, D. ^[1]; Vetter, S. ^[1]

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1. SLAC National Accelerator Lab., Menlo Park, CA (United States)

Photocathode RF gun has been widely used for generation of high-brightness electron beams for many different applications. We found that the drive laser distributions in such RF guns play important roles in minimizing the electron beam emittance. Characterizing the laser distributions with measurable parameters and optimizing beam emittance versus the laser distribution parameters in both spatial and temporal directions are highly desired for high-brightness electron beam operation. In this paper, we report systematic measurements and simulations of emittance dependence on the measurable parameters represented for spatial and temporal laser distributions at the photocathode RF gun systems of Linac Coherent Light Source. The tolerable parameter ranges for photocathode drive laser distributions in both directions are presented for ultra-low emittance beam operations.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1228737
• Report Number(s): SLAC-PUB-16436
• Journal Information: Physical Review Special Topics - Accelerators and Beams, Journal Name: Physical Review Special Topics - Accelerators and Beams
• Country of Publication: United States
• Language: English

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