In-tank, on-shot characterization of the OMEGA laser system focal spot

Journal Article · Mon Mar 04 00:00:00 EST 2019 · Proc. SPIE

DOI:https://doi.org/10.1117/12.2506792· OSTI ID:1502136

Waxer, Leon J. ^[1]; Bauer, Katelynn ^[1]; Cost, Emil ^[1]; Heimbueger, Matthew ^[1]; Kelly, John H. ^[1]; Kobilansky, Victor ^[1]; Morse, Samuel ^[1]; Nelson, David ^[1]; Peck, Robert ^[1]; Rinefierd, Robert ^[1]; Sampat, Siddharth ^[1]; Shoup, Milton J. ^[1]; Weiner, David ^[1]; Weselak, Gregory ^[1]; Zou, Jun ^[1]

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

Direct-drive fusion implosion experiments using the 60-beam OMEGA Laser System require ~1% rms uniformity on target. Measurements from laser diagnostics indicate that beam-to-beam power variation has been sufficiently reduced such that the uniformity nearly meets this requirement; however, experimental results suggest otherwise. To better understand this discrepancy, a full-beam-in-tank diagnostic has been developed to characterize the on-shot, full-energy focal spot of a single beam inside the target chamber using a small sample of the beam from the final optic assembly. In this paper, we describe the diagnostic and present the results of commissioning experiments.

• Research Organization: Univ. of Rochester, NY (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• Grant/Contract Number: NA0003856
• OSTI ID: 1502136
• Journal Information: Proc. SPIE, Vol. 10898; Conference: SPIE LASE 2019, San Francisco, CA (United States), 2-7 Feb 2019
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
diagnostics
laser systems engineering
wavefronts
near field optics
CCD cameras
fusion energy