DOSIMETRY WITH MICRO STRIP GAS-CHAMBERS

The current technique of cancer radiotherapy makes use of radiation be ams directed on the body of the patient to deposit a large amount of e nergy in the tumour cells. Very positive results have been obtained us ing photon beams and a significant improvement can be expected with th e use of light ion beams. Along these lines, in the framework of the T ERA project, we are developing a sampling clorimeter made of tissue-eq uivalent absorber and Micro Strip Gas Chambers (MSGC). The purpose is to study the energy deposition, fragmentation and track structure of l ight ions in tissue equivalent material. Preliminary results obtained with a MSGCs telescope in a carbon beam with an energy of 270 MeV/u ar e presented and compared with Monte-Carlo calculations.