TY - JOUR
T1 - Feasibility study of an efficient method to measure depth profile of particle ions using a wedge-shaped acrylic block
AU - Yamamoto, S.
AU - Yabe, T.
AU - Akagi, T.
N1 - Funding Information:
The carbon-ion-beam measurements were performed at the Hyogo Ion Beam Medical Center. We thank its clinical teams for allowing us beam time for our experiments, as well as its staff members who helped us prepare and carry out the irradiations. This work was supported in part by JSPS KAKENHI Grant Number JP18K19909 and 19H00672.
Publisher Copyright:
© 2021 IOP Publishing Ltd and Sissa Medialab
PY - 2021/6
Y1 - 2021/6
N2 - The depth-profile measurement of particle ions is a time- and labor-consuming task, and thus an efficient method is desired. To solve this problem, we propose a new method to measure depth profiles and test it for carbon ions. In our method, we use a thin silver-activated zinc sulfide (ZnS(Ag)) scintillator plate set against the inner top side of a black box and irradiate a uniform carbon-ion beam to this plate from the upper side. On the ZnS(Ag) plate, a wedge-shaped acrylic block is set to absorb the carbon ions depending on the plate’s position. The scintillation light’s image is reflected by a surface mirror set below the ZnS(Ag) plate and then detected by a cooled charge-coupled device (CCD) camera from the side. We irradiate carbon ions for 6 s and measure the ZnS(Ag) image that is partially attenuated by the wedge-shaped acrylic block. By setting the profile on the measured image, we could estimate the depth profile of the carbon-ion beam, although a quenching of the scintillator is observed around the Bragg peak area. We conclude that our proposed method is promising for efficiently measuring the depth profile of particle ions.
AB - The depth-profile measurement of particle ions is a time- and labor-consuming task, and thus an efficient method is desired. To solve this problem, we propose a new method to measure depth profiles and test it for carbon ions. In our method, we use a thin silver-activated zinc sulfide (ZnS(Ag)) scintillator plate set against the inner top side of a black box and irradiate a uniform carbon-ion beam to this plate from the upper side. On the ZnS(Ag) plate, a wedge-shaped acrylic block is set to absorb the carbon ions depending on the plate’s position. The scintillation light’s image is reflected by a surface mirror set below the ZnS(Ag) plate and then detected by a cooled charge-coupled device (CCD) camera from the side. We irradiate carbon ions for 6 s and measure the ZnS(Ag) image that is partially attenuated by the wedge-shaped acrylic block. By setting the profile on the measured image, we could estimate the depth profile of the carbon-ion beam, although a quenching of the scintillator is observed around the Bragg peak area. We conclude that our proposed method is promising for efficiently measuring the depth profile of particle ions.
KW - Beam-intensity monitors
KW - Beam-line instrumentation (beam position and profile monitors
KW - Bunch length monitors)
KW - Heavy-ion detectors
KW - Instrumentation for particle-beam therapy
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U2 - 10.1088/1748-0221/16/06/T06013
DO - 10.1088/1748-0221/16/06/T06013
M3 - Article
AN - SCOPUS:85110714581
SN - 1748-0221
VL - 16
JO - Journal of Instrumentation
JF - Journal of Instrumentation
IS - 6
M1 - T06013
ER -