A flexible proton beam imaging energy spectrometer (PROBIES) for high repetition rate or single-shot high energy density (HED) experiments (invited)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- California State University Channel Islands, Camarillo, CA (United States)
- Colorado State Univ., Fort Collins, CO (United States)
- Univ. of California San Diego, La Jolla, CA (United States)
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Colorado State Univ., Fort Collins, CO (United States)
The PROBIES diagnostic is a new, highly flexible, imaging and energy spectrometer designed for laser-accelerated protons. The diagnostic can detect low-mode spatial variations in the proton beam profile while resolving multiple energies on a single detector or more. When a radiochromic film stack is employed for “single-shot mode,” the energy resolution of the stack can be greatly increased while reducing the need for large numbers of films; for example, a recently deployed version allowed for 180 unique energy measurements spanning ∼3 to 75 MeV with <0.4 MeV resolution using just 20 films vs 180 for a comparable traditional film and filter stack. When utilized with a scintillator, the diagnostic can be run in high-rep-rate (>Hz rate) mode to recover nine proton energy bins. We also demonstrate a deep learning-based method to analyze data from synthetic PROBIES images with greater than 95% accuracy on sub-millisecond timescales and retrained with experimental data to analyze real-world images on sub-millisecond time-scales with comparable accuracy.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
- Grant/Contract Number:
- AC52-07NA27344; SC0019076; SCW1651; SCW1720; SCW1722; 20-ERD-048; 21-ERD-015; AC5207NA27344
- OSTI ID:
- 1972902
- Alternate ID(s):
- OSTI ID: 1957672
- Report Number(s):
- LLNL-JRNL-836069; 1054901; TRN: US2314091
- Journal Information:
- Review of Scientific Instruments, Vol. 94, Issue 2; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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