In The Review of scientific instruments
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.
Mariscal D A, Djordjević B Z, Anirudh R, Bremer T, Campbell P C, Feister S, Folsom E, Grace E S, Hollinger R, Jacobs S A, Kailkhura B, Kalantar D, Kemp A J, Kim J, Kur E, Liu S, Ludwig J, Morrison J, Nedbailo R, Ose N, Park J, Rocca J J, Scott G G, Simpson R A, Song H, Spears B, Sullivan B, Swanson K K, Thiagarajan J, Wang S, Williams G J, Wilks S C, Wyatt M, Van Essen B, Zacharias R, Zeraouli G, Zhang J, Ma T
2023-Feb-01
