D₂ and DT Liquid-Layer Target Shots on NIF

Technical Report · Fri Sep 22 00:00:00 EDT 2017

DOI:https://doi.org/10.2172/1404849· OSTI ID:1404849

Walters, Curtis ^[1]; Alger, Ethan ^[2]; Bhandarkar, Suhas ^[1]; Boehm, Kurt ^[2]; Braun, Tom ^[1]; Espinosaloza, Francisco ^[1]; Haid, Benjamin ^[1]; Heredia, Ricardo ^[1]; Kline, John ^[3]; Kozioziemski, Bernard ^[1]; Kroll, Jeremy ^[1]; Malone, Daniel ^[1]; Nikroo, Abbas ^[1]; Opsahl, Patrick ^[1]; Sater, James ^[1]; Zylstra, Alex ^[3]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
2. General Atomics, San Diego, CA (United States)
3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Experiments at the National Ignition Facility (NIF) using targets containing a Deuterium-Tritium (DT) fuel layer have, until recently, required that a high-quality layer of solid deuterium-tritium (herein referred to as an "ice-layer") be formed in the capsule. The development of a process to line the inner surface of a target capsule with a foam layer of a thickness that is typical of icelayers has resulted in the ability to field targets with liquid layers wetting the foam. Successful fielding of liquid-layer targets on NIF required not only a foam lined capsule, but also changes to the capsule filling process and the manner with which the inventory is maintained in the capsule. Additionally, changes to target heater power and the temperature drops across target components were required in order to achieve the desired range of shot temperatures. These changes, and the target's performance during four target shots on NIF will be discussed.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-07NA27344
• OSTI ID: 1404849
• Report Number(s): LLNL-TR-738871
• Country of Publication: United States
• Language: English

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