A new tri-particle backlighter for high-energy-density plasmas (invited)

Sutcliffe, Graeme; Adrian, Patrick; Pearcy, Jacob; Johnson, Timothy; Kabadi, Neel; Haque, Shaherul; Parker, Cody; Lahmann, Brandon; Frenje, Johan; Gatu-Johnson, Maria; Sio, Hong; Séguin, Fredrick; Pollock, Brad; Moody, John; Glebov, Vladmir; Janezic, Roger; Koch, Michael; Petrasso, Richard; Li, Chikang

doi:10.1063/5.0043845

Title: A new tri-particle backlighter for high-energy-density plasmas (invited)

Journal Article · 31 May 2021 · Review of Scientific Instruments

DOI: https://doi.org/10.1063/5.0043845 · OSTI ID:1835033

^[1];

^[1]; Séguin, Fredrick ^[1]; Pollock, Brad ^[2];

^[2];

^[3]; Janezic, Roger ^[3]; Koch, Michael ^[3];

^[1]; Li, Chikang ^[1]

Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Rochester, NY (United States). Lab. for Laser Energetics

A new tri-particle mono-energetic backlighter based on laser-driven implosions of DT3He gas-filled capsules has been implemented at the OMEGA laser. This platform, an extension of the original D³He backlighter platform, generates 9.5 MeV deuterons from the T3He reaction in addition to 14.7 and 3.0 MeV protons from the deuterium and helium-3 reactants. The monoenergetic 14.7 and 3.0 MeV protons have been used with success at OMEGA and the NIF for both radiography and stopping-power studies. There are several advantages of having a third particle to diagnose plasma conditions: an extra time-of-flight-separated radiograph and an improved ability to discern between electric and magnetic fields. In cases where the 3.0 MeV protons cannot penetrate an experiment, the benefit of the additional 9.5 MeV deuterons is magnified. This capability is well-suited for NIF experiments, where large fields and plasma densities often preclude useful 3.0 MeV proton data. The advantages are demonstrated with radiographs of OMEGA plasmas with magnetic and electric fields. Tests using backlighter-scale 420 μm diameter thin glass capsules validate the platform’s extended backlighting capability. The performance characteristics of this backlighter, such as source size and timing, are discussed.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

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

Grant/Contract Number:: AC52-07NA27344; NA0003868

OSTI ID:: 1835033

Report Number(s):: LLNL-JRNL--828655; 1043913

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 6 Vol. 92; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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