Abstract

The full-beam in-tank (FBIT) diagnostic has been deployed to directly measure the target-plane beam fluence profile, when operated at high energy, of the OMEGA Laser System at the University of Rochester’s Laboratory for Laser Energetics. This paper presents the results of early measurements taken with this diagnostic and discusses an improvement that has overcome performance limitations discovered during the initial testing. The diagnostic gives new insight into the ability of the OMEGA Laser System to provide uniform fluence profiles that are consistent across all 60 beams in the laser. The ultimate goal of the FBIT diagnostic is to allow accurate assessment of the fluence uniformity on a spherical target in 60-beam implosion experiments.

© 2020 Optical Society of America

Power balancing the multibeam OMEGA laser

S. Sampat, T. Z. Kosc, K. A. Bauer, R. D. Dean, W. R. Donaldson, J. Kwiatkowski, R. Moshier, A. L. Rigatti, M. H. Romanofsky, L. J. Waxer, and J. H. Kelly
Appl. Opt. 57(32) 9571-9583 (2018)

A focal-spot diagnostic for on-shot characterization of high-energy petawatt lasers

J. Bromage, S.-W. Bahk, D. Irwin, J. Kwiatkowski, A. Pruyne, M. Millecchia, M. Moore, and J. D. Zuegel
Opt. Express 16(21) 16561-16572 (2008)

Accurate target-plane focal-spot characterization in high-energy laser systems using phase retrieval

B. E. Kruschwitz, S.-W. Bahk, J. Bromage, M. D. Moore, and D. Irwin
Opt. Express 20(19) 20874-20883 (2012)

Single-shot, phase-diversity phase retrieval for high-energy beam focal-spot diagnostics

Seung-Whan Bahk, Siddharth Sampat, Matthew Heimbueger, David Weiner, Joseph Kwiatkowski, Katelynn A. Bauer, and Leon J. Waxer
J. Opt. Soc. Am. B 40(11) 2920-2927 (2023)

On-shot focal-spot characterization technique using phase retrieval

Seung-Whan Bahk, Jake Bromage, Ildar A. Begishev, Chad Mileham, Christian Stoeckl, Michael Storm, and Jonathan D. Zuegel
Appl. Opt. 47(25) 4589-4597 (2008)