EBG MedAustron GmbH
Treatment facility optimization studies
The Fellow will study upgrade scenarios and elaborate a benefit analysis for the specific case of the MedAustron facility to reduce patient treatment time, thus allowing for a larger number of patients to be treated each year. The Fellow will participate in the commissioning of the not-yet-operational beam lines and contribute to the further development of the accelerator.
The possibilities to enhance the machine performance comprise:
a) Reduction of the cycle time of the synchrotron.
Presently, one of the most impacting factor is the reproduction of the magnet hysteresis in each cycle to assure reproducibility, which can be avoided through the development of a system for magnetic field regulation of the power converters for the synchrotron dipoles and quadrupoles (B-train and Q-train system). Other factors that are affecting the cycle time and need further optimization are: the time needed for acceleration (currently the maximum ramping rate achievable for the magnets cannot be reached due to beam optics limitations leading to beam losses); extraction delay due to resonant extraction mechanism.
b) Active stabilization and control of the beam extracted from the synchrotron.
The intensity stabilization of the extracted beam on a sub-millisecond timescale would ease the irradiation process; furthermore the adaptation of the extracted particle rate to the amount of particles requested per raster point in the tumor region would significantly speed up the irradiation process.
c) Variable energy extraction.
Adapting the extraction energy of the synchrotron during one spill will allow the irradiation of multiple energy layers in the tumor with one synchrotron filling, while the synchrotron is always filled with the maximum number of ions provided by the injector.
Images MedAustron © Thomas Kästenbauer