Speaker
Description
Ultra-high-energy electrons are used to investigate their effects on cell samples in nanosecond to microsecond pulses at the electron accelerator facility ELSA. This may allow highly efficient treatment of deep-seated tumors through the FLASH effect. Previous studies at ELSA using an inital extraction mode with 250 ns long pulses from the 1.2 GeV booster synchrotron demonstrated the suitability for FLASH radiotherapy studies. A newly developed single-turn extraction scheme from the stretcher ring now enables access to beam energies of up to 3.2 GeV with pulse lengths of approximately 330 ns and improved beam stability. In preparation for upcoming cell irradiation studies with this new extraction mode, precise dose determination is carried out by combining radiochromic film measurements with Geant4 simulations over the full energy range from 1.2 GeV to 3.2 GeV. Depth-dose curves from the previous and current operation modes are compared. Additionally, studies of Cherenkov radiation are performed to evaluate its potential for beam characterization.
| Paper status | Proceeding files received |
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