An online, energy-resolving beam profile detector for laser-driven proton beams

作者：Metzkes J^*; Zeil K; Kraft S D; Karsch L; Sobiella M; Rehwald M; Obst L; Schlenvoigt H P; Schramm U

来源：Review of Scientific Instruments, 2016, 87(8): 083310.

DOI：10.1063/1.4961576

In this paper, a scintillator-based online beam profile detector for the characterization of laser-driven proton beams is presented. Using a pixelated matrix with varying absorber thicknesses, the proton beam is spatially resolved in two dimensions and simultaneously energy-resolved. A thin plastic scintillator placed behind the absorber and read out by a CCD camera is used as the active detector material. The spatial detector resolution reaches down to similar to 4 mm and the detector can resolve proton beam profiles for up to 9 proton threshold energies. With these detector design parameters, the spatial characteristics of the proton distribution and its cut-off energy can be analyzed online and on-shot under vacuum conditions. The paper discusses the detector design, its characterization and calibration at a conventional proton source, as well as the first detector application at a laser-driven proton source. Published by AIP Publishing.

• 出版日期2016-8