Raman Amplification with a Flying Focus

Turnbull, D.; Bucht, S.; Davies, A.; Haberberger, D.; Kessler, T.; Shaw, J. L.; Froula, D. H.

doi:10.1103/PhysRevLett.120.024801

Title: Raman Amplification with a Flying Focus

Journal Article · Fri Jan 12 00:00:00 EST 2018 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.120.024801· OSTI ID:1417648

Turnbull, D. ^[1]; Bucht, S. ^[1]; Davies, A. ^[1]; Haberberger, D. ^[1]; Kessler, T. ^[1]; Shaw, J. L. ^[1]; Froula, D. H. ^[1]

Univ. of Rochester, Rochester, NY (United States)

Here, we propose a new laser amplifier scheme utilizing stimulated Raman scattering in plasma in conjunction with a "flying focus" - a chromatic focusing system combined with a chirped pump beam that provides spatiotemporal control over the pump's focal spot. Pump intensity isosurfaces are made to propagate at v=-c so as to be in sync with the injected counterpropagating seed pulse. By setting the pump intensity in the interaction region to be just about the ionization threshold of the background gas, an ionization wave is produced that travels at a fixed distance ahead of the seed. Simulations show that this will make it possible to optimize the plasma temperature and mitigate many of the issues that are known to have impacted previous Raman amplification experiments, in particular, the growth of precursors.

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Research Organization:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0001944; SC0016253

OSTI ID:: 1417648

Alternate ID(s):: OSTI ID: 1416843

Report Number(s):: 2017-179, 1366; PRLTAO; 2017-179, 2322, 1366; TRN: US1801096

Journal Information:: Physical Review Letters, Vol. 120, Issue 2; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 41 works

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