A new high energy proton irradiation facility at Chang Gung Memorial Hospital in Taiwan

Niu Huan^1*

¹Nuclear Science and Technology Development Center, National Tsing Hua University, HsinChu, Taiwan

* Presenter:Niu Huan, email:hniu@mx.nthu.edu.tw

The construction of a new proton irradiation facility dedicated to radiobiology and physics researches has been completed at the Chang Gung Memorial Hospital (CGMH) in Taiwan. There are three beam lines installed for broad and small field proton irradiation and high energy neutron generation. We present the status of the facility with the proton beam energy ranges between 70 MeV and 230 MeV. A double scattering system was designed to generate an irradiation field that is large enough to ensure the delivery of dose greater than 90% uniformity over an area of several squared centimeters. The apparatus includes a wheel type range modulator for spread-out Bragg peak (SOBP), and a strip 2D ionization chamber and a multilayer ionization chamber for beam size and dose profiles in XY plane and Z direction, respectively. This facility has opened world wildly and the user applications will be welcomed

Keywords: proton, double scattering system, Bragg peak