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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 7: Ion and Medical Accelerators
AKBP 7.5: Vortrag
Dienstag, 10. März 2026, 15:00–15:15, SCH/A117
Dosimetry and beam monitoring for laser-accelerated protons — •Joshua Schilz, Florian Kroll, Karl Zeil, Ulrich Schramm, and Josefine Metzkes-Ng — Helmholtz-Zentrum Dresden-Rossendorf, Germany
Laser-driven plasma accelerators (LPAs) provide multi-10 MeV proton bunches at extremely high instantaneous dose rates, offering unique opportunities for application-oriented studies such as radiobiology. To use these beams effectively, a dedicated experimental environment is required. The ALBUS-2S beamline at the Helmholtz-Zentrum Dresden–Rossendorf delivers such proton beams and is already qualified for irradiating millimeter-scale in vivo samples. Building on initial pilot work, we investigate improved methods for beam monitoring and dosimetry of single, ultra-short proton bunches delivering multi-Gy doses.
Two detector concepts were tested at ALBUS-2S. The miniSCIDOM scintillator tomograph enables online 3D dose reconstruction in volumes of about 1 cm3 with sub-500 µm resolution and 100 mGy sensitivity, including characterization of scintillator quenching at LPA dose rates. A complementary time-of-flight detector records transmitted proton spectra, allowing Monte Carlo-based depth–dose predictions; recent studies have established an optimized detector configuration for routine use.
Together, these diagnostics enable precise characterization of laser-accelerated proton beams, supporting reliable radiobiological experiments under the extreme conditions produced by LPAs.
Keywords: laser-driven protons; detectors; application-oriented; dosimetry