Development of a High-Average-Power Compton Gamma Source for Lepton Colliders

Journal Article · Thu Jan 22 00:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3080997· OSTI ID:21255308

Pogorelsky, Igor; Polyanskiy, Mikhail N; Yakimenko, Vitaliy ^[1]; Platonenko, Viktor T ^[2]

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1. Brookhaven National Laboratory, bldg. 820M, Upton, NY 11973 (United States)
2. Lomonosov Moscow State University, Physics Department, Vorob'evy Gory 119992 (Russian Federation)

Gamma-({gamma}{sup -}) ray beams of high average power and peak brightness are of demand for a number of applications in high-energy physics, material processing, medicine, etc. One of such examples is gamma conversion into polarized positrons and muons that is under consideration for projected lepton colliders. A {gamma}-source based on the Compton backscattering from the relativistic electron beam is a promising candidate for this application. Our approach to the high-repetition {gamma}-source assumes placing the Compton interaction point inside a CO{sub 2} laser cavity. A laser pulse interacts with periodical electron bunches on each round-trip inside the laser cavity producing the corresponding train of {gamma}-pulses. The round-trip optical losses can be compensated by amplification in the active laser medium. The major challenge for this approach is in maintaining stable amplification rate for a picosecond CO{sub 2}-laser pulse during multiple resonator round-trips without significant deterioration of its temporal and transverse profiles. Addressing this task, we elaborated on a computer code that allows identifying the directions and priorities in the development of such a multi-pass picosecond CO{sub 2} laser. Proof-of-principle experiments help to verify the model and show the viability of the concept. In these tests we demonstrated extended trains of picosecond CO{sub 2} laser pulses circulating inside the cavity that incorporates the Compton interaction point.

• OSTI ID: 21255308
• Journal Information: AIP Conference Proceedings, Vol. 1086, Issue 1; Conference: 13. advanced accelerator concepts workshop, Santa Cruz, CA (United States), 27 Jul - 2 Aug 2008; Other Information: DOI: 10.1063/1.3080997; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFICATION
BACKSCATTERING
CARBON DIOXIDE LASERS
COMPTON EFFECT
COMPUTER CODES
ELECTRON BEAMS
ELECTRONS
GAMMA RADIATION
GAMMA SOURCES
HIGH ENERGY PHYSICS
LASER CAVITIES
MUON BEAMS
MUONS
PERIODICITY
POSITRON BEAMS
POSITRONS
PULSES
RELATIVISTIC RANGE
RESONATORS