Focused beam dosimetry of short VHEE bunches

Enrico Brunetti, Antoine Maitrallain, Dino A. Jaroszynski

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

1 Citation (Scopus)
8 Downloads (Pure)


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.
Original languageEnglish
Title of host publicationRelativistic Plasma Waves and Particle Beams as Coherent and Incoherent Radiation Sources IV
EditorsDino A. Jaroszynski, MinSup Hur
Place of PublicationWashington, USA
Number of pages8
ISBN (Electronic)9781510643918
Publication statusPublished - 18 Apr 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


  • focused electrons
  • radiotherapy
  • Monte Carlo simulations


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