Abstract
Proton beam, as one of the ion beam, applied in physics of high energies and nuclear. Under general condition, the atom is not exist alone. The only way to use proton is from the source of particle accelerator under the high-energy collision .In another hand, the semiconductor procession uses ion beam to do IBMM (Ion Beam Modification of Materials). Recently, there are more proton therapy facility built for the cancer patients. According to the dose depth curve, the specific energy of the source has the maximum releasing when approaching the specific target. The accelerated ion can reach the tumor accurately for the cancer therapy. The dose of the source realising as reach specific point in the curation need to be exactly monitored. The way to monitor the proton beam include: Faraday Cup, Secondary Electron Monitor, Gas Electron Multiplier and Ionization Chamber. The aim of this study is to make a designed, self-made parallel-plate ionization chamber if it could be more accurate and specific for monitor the proton beam. The experiments include γ-ray test program, and proton beam current voltage characteristics curve. The result showed that the self-make parallel-plate ionization chamber was useable underγ-ray test program. Besides, proton beam was produced in the experiment of 3.0 MeV、3.5 MeV external proton beam in air verification, which confirmed this experiment system could work. There was a phenomenon of the curve in the current voltage characteristic curve experiment but with less signal collection efficiency. In the future, the calibration curve could be built under different situation to apply into monitoring of the proton beam output.