Candidate thesis:Design of a monochromatizing wedge decelerator for therapeutic positron emitting light ion beams
by
Jil Schwender(Physics, KTH and Medical Radiation, KI)
→
Europe/Stockholm
A4:1069
A4:1069
Description
This study has been devoted to the optimal design of a wedge decelerator that can be introduced in the beam line of a positron emitting 11C beam in order to monochomatize the energy spread and suppress the production of other light fragments. The results of the study show that in terms of uncertainties and angular spread beryllium is achieving the best monochromaticity while suppressing 7Be in the better way than the other
materials. Another possible material that would have the advantage to increase the fluence of the 11C beam could be liquid hydrogen. This material could be looked at in further studies. When it comes to the clinical implementation one has to develop a design of a wedge which can be used for different 11C beam mean energies. Possible interesting designs have been introduced in the discussion and their limitations and advantages needs to be studied in further work.
Studying the limitations it might be possible to find the optimal design of the wedge in terms of
material as well as implementation into clinical use.
This way the wedge decelerater could pave the way for the positron emitting 11C coming from deceleration of 12C being introduced into clinical use. The monochromatic beam then can be used for radiation therapy of radio resistant tumors while controlling on line the dose delivery.
