Gas scintillation mitigation in gas Cherenkov detectors for inertial confinement fusion (invited)
Abstract
Gas Cherenkov detectors provide a time resolved measurement of the fusion burn in inertial confinement fusion experiments. The fusion rate delivers critical benchmark figures, such as burn width and bang time. Recent detector improvements pushed temporal resolution to 10 ps to make burn width measurements on igniting targets possible. First high temporal resolution measurements using CO2 gas fills had a background signal with a long decay length (tail), which was caused by gas scintillation. This gas scintillation limits the ability of the detector to resolve short burn width and high frequency features in the fusion rate measurements. A thorough investigation of the cause of the tail and mitigation options for gas scintillation is presented here. As a near-term resolution, neon gas is being used to extract fusion burn histories. Paths forward for the next generation of gas Cherenkov detectors are identified including the usage of oxygen as a Cherenkov medium.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 01, 2022
- Source ID
- 10.1063/5.0101869
Entities
People
- E. Mariscal
- Hermann Geppert-Kleinrath
- Jorge A. Carrera
- Kevin Meaney
- Michael S. Rubery
- Yong Ho Kim
Organizations
- Lawrence Livermore National Laboratory
- Los Alamos National Laboratory
- United States Department of Energy