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ST: Fachverband Strahlen- und Medizinphysik
ST 4: Accelerators for Medical Applications (joint session ST/AKBP)
ST 4.6: Vortrag
Mittwoch, 2. April 2025, 15:15–15:30, ZHG009
Dosimetry of broadband electrons from laser-plasma accelerators — •Antonio Tarzikhan1, Arpad Lenart2, Chuan Zheng1, Thomas Heinemann1, Constantin Aniculaesei1, Mirela Cerchez1, and Bernhard Hidding1 — 1Institute of Laser- and Plasmaphysics, Heinrich Heine University, Düsseldorf, Germany — 2University of Strathclyde, Glasgow, Scottland
Laser-plasma accelerators (LPA) offers compact sources of highly relativistic electron beams for various applications. This study focuses on the dosimetry of broadband electron beams, which are accelerated using the Arcturus laser system at the University of Düsseldorf with laser pulse energies of several millijoules sufficient to accelerate electrons to kinetic energies in the mega-electronvolt range, resulting in an energy distribution characterized by a shallow penetration and high dose deposition at the surface. These electron beams are therefore ideally suited for the treatment of skin cancer. We present the design and calibration of various diagnostics components and report on first experimental results obtained in a recent measurement campaign, incorporated with simulations to optimize the parameters used for the characterization of the electron beam energy- and angular-distribution and the charge calibration to determine the dose. Additionally, accelerated electron beams from intrinsic ultra-short bunch durations, are excellent candidates for FLASH radiotherapy and thus, minimizing damage to surrounding healthy tissues. This highlights the potential of LPA as a new technology in medical physics.
Keywords: Laser; Plasma; Accelerators; Radiation; Therapy