Characterization of Distributed Phase Plates for use on Z-Beamlet

Technical Report · Tue Sep 17 04:00:00 EDT 2019

DOI:https://doi.org/10.2172/1562365· OSTI ID:1562365

Geissel, Matthias ^[1]; Schwarz, Jens ^[1]; Smith, Ian C. ^[1]; Shores, Jonathon E. ^[1]

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1. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Distributed Phase Plates (DPP) are used in laser experiments to create homogenous intensity distributions of a distinct shape at the location of the laser focus. Such focal shaping helps with controlling the intensity that is impeding on the target. To efficiently use a DPP, the exact size and shape of the focal distribution is of critical importance. We recorded direct images of the focal distribution with ideal continuous-wave (CW) alignment lasers and with laser pulses delivered by the Z-Beamlet facility. As necessary to protect the imaging sensors, laser pulses will not be performed by full system shots, but rather with limited energy on so-called 'rod-shots', in which Z-Beamlet's main amplifiers do not engage. The images are subsequently analyzed for characteristic radii and shape. All characterizations were performed at the Pecos target area of Sandia with a lens of 3.2 m focal length.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1562365
• Report Number(s): SAND--2019-10685; 679253
• Country of Publication: United States
• Language: English

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