Focused beam dosimetry of short VHEE bunches

Enrico Brunetti; Antoine Maitrallain; Dino A. Jaroszynski

doi:10.1117/12.2595299

18 April 2021 Focused beam dosimetry of short VHEE bunches

Enrico Brunetti, Antoine Maitrallain, Dino A. Jaroszynski

Proceedings Volume 11778, Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources IV; 117780N (2021) https://doi.org/10.1117/12.2595299
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

Accelerators driven by 10s TW-class lasers can produce electron bunches with femtosecond-scale duration and energy of 100s of MeV. A potential application of such short bunches is high-dose rate radiotherapy, which could transition to FLASH radiotherapy if a sufficiently large dose is delivered in a single shot. Here we present Monte Carlo simulations to study the bunch length evolution of an electron beam propagating in a water phantom. We show that for electron energies above 100 MeV the bunch lengthens to 1–10 ps duration after interaction with a 30 cm long water phantom, both for a collimated and weakly focused geometry. The corresponding dose rates are on the order of 200 Gy/s per primary electron, much higher than in conventional radiotherapy.

Conference Presentation

Citation Download Citation

Enrico Brunetti, Antoine Maitrallain, and Dino A. Jaroszynski "Focused beam dosimetry of short VHEE bunches", Proc. SPIE 11778, Relativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources IV, 117780N (18 April 2021); https://doi.org/10.1117/12.2595299

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