| Title |
The Optimization Design and Output Characteristic Analysis of Ionization Chamber Dose Monitor in HUST-PTF |
| Authors |
- H.D. Guo, Y.Y. Hu, X.Y. Li, Y.J. Lin, P. Tan, Y. Yu
HUST, Wuhan, People's Republic of China
- X. Liupresenter
Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China
|
| Abstract |
An air parallel-plate ion chamber, which acts as a dose monitor for the beam delivery system in Huazhong University of Science and Technology Proton Therapy Facility(HUST-PTF), is designed as a redundant twin ionization chamber in order to meet the security requirements. In this paper, the characteristics of the designed ionization chamber are studied by using Boag theory and Monte Carlo simulation. Geant4 and SRIM are applied to simulate the energy loss and gain of 70-230MeV proton beam in parallel-plate ionization chamber. The influences of different sensitive regions and different gases on the performance of proton beam are discussed, moreover the structure of ionization chamber is optimized. According to the theory of Boag, the collection efficiencies of ionization chamber under different bias are calculated. The results show that the secondary particle collection efficiency of ionization chamber can reach above 99% when the air gap of ionization chamber is 5mm and bias voltage is above 100V. By the calculated gain of the ionization chamber, the output current of the detector can reach the order of 10nA when the proton beam intensity is 0.1nA.
|
| Paper |
download WEPCF09.PDF [0.341 MB / 3 pages] |
| Export |
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| Conference |
IBIC2017, Grand Rapids, MI, USA |
| Series |
International Beam Instrumentation Conference (6th) |
| Proceedings |
Link to full IBIC2017 Proccedings |
| Session |
Wednesday Poster |
| Date |
23-Aug-17 16:00–18:00 |
| Main Classification |
8 Charge Monitors and Other Instruments |
| Keywords |
ion, proton, electron, simulation, radiation |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Zhengzheng Liu (FRIB, East Lansing, MI, USA); Steven Lidia (FRIB, East Lansing, MI, USA); Amy McCausey (FRIB, East Lansing, MI, USA); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-192-2 |
| Published |
March 2018 |
| Copyright |
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