Gas breakdown limits for inverse Cherenkov laser accelerators

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Description

The probability of avalanche, tunneling and multiphoton ionization induced by a CO{sub 2} laser in H{sub 2} gas has been calculated. Laser light screening by a self-induced plasma density gradient is considered as the limiting factor for upscaling a CO{sub 2} laser-driven Inverse Cherenkov Laser Accelerator beyond 650 MeV/m. However, in near-resonance inverse Cherenkov acceleration where a shorter wavelength laser is used at a wavelength near the resonance of the gas (e.g. 248nm in H{sub 2}), the formation of a plasma is not a problem because the plasma density is below the critical density. In that case, the laser beam ... continued below

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13 p.

Creation Information

Liu, Y. & Pogorelsky, I.V. July 1, 1995.

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  • Liu, Y. California Univ., Los Angeles, CA (United States). Dept. of Physics
  • Pogorelsky, I.V. Brookhaven National Lab., Upton, NY (United States)

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Description

The probability of avalanche, tunneling and multiphoton ionization induced by a CO{sub 2} laser in H{sub 2} gas has been calculated. Laser light screening by a self-induced plasma density gradient is considered as the limiting factor for upscaling a CO{sub 2} laser-driven Inverse Cherenkov Laser Accelerator beyond 650 MeV/m. However, in near-resonance inverse Cherenkov acceleration where a shorter wavelength laser is used at a wavelength near the resonance of the gas (e.g. 248nm in H{sub 2}), the formation of a plasma is not a problem because the plasma density is below the critical density. In that case, the laser beam propagates unaffected through the plasma and the acceleration gradient is not limited by gas breakdown. Gradients > 1 GeV/m are possible.

Physical Description

13 p.

Notes

INIS; OSTI as DE95015367

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  • Other Information: PBD: [1995]

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  • Other: DE95015367
  • Report No.: BNL--61876
  • Grant Number: AC02-76CH00016
  • DOI: 10.2172/88566 | External Link
  • Office of Scientific & Technical Information Report Number: 88566
  • Archival Resource Key: ark:/67531/metadc792979

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Creation Date

  • July 1, 1995

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • Jan. 6, 2016, 5:16 p.m.

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Liu, Y. & Pogorelsky, I.V. Gas breakdown limits for inverse Cherenkov laser accelerators, report, July 1, 1995; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc792979/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.