Performance of parallel plate ionization chamber for medical irradiation

Author

Urakabe, E. ; Inoue, M. ; Iwashita, Y. ; Shirai, T. ; Sugimura, T. ; Noda, A. ; Kanazawa, M. ; Torikoshi, M. ; Noda, K. ; Yamada, S. ; Tadokoro, M. ; Nishi, M. ; Fujita, Y.

Author_Institution

Inst. for Chem. Res., Kyoto Univ., Japan

Volume

3

fYear

1997

fDate

12-16 May 1997

Firstpage

3819

Abstract

We have developed parallel plate ionization chambers (PPIC) to measure not only the cumulative intensity but also the time structure of slow-extracted heavy-ion beams from a medical synchrotron. The characteristics of the PPIC with 3 mm and 1 mm gap distances for 760, 200, 111, and 55 Torr air were investigated with C⁶⁺ beam (290 MeV/u) at HIMAC. The applied voltage to start the plateau region strongly depends on the beam intensity, and pressure of counter gas. The PPIC can be also used as a useful beam monitor for the time-structure measurement of heavy-ion beams

Keywords

ion accelerators; ion beams; ionisation chambers; particle beam diagnostics; particle beam extraction; radiation therapy; synchrotrons; 111 torr; 200 torr; 290 MeV; 55 torr; 760 torr; C; C⁶⁺ beam; HIMAC; beam monitor; cumulative intensity measurement; medical irradiation; medical synchrotron; parallel plate ionization chamber performance; plateau region; slow-extracted heavy-ion beams; time structure; Aluminum; Biomedical monitoring; Electrodes; Ion beams; Ionization chambers; Radiation detectors; Radiation monitoring; Synchrotrons; Time measurement; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.753426

Filename

753426