TY - JOUR
T1 - Development of an Electron-Tracking Compton Camera using CF4 gas at high pressure for improved detection efficiency
AU - Takahashi, Michiaki
AU - Kabuki, Shigeto
AU - Hattori, Kaori
AU - Higashi, Naoki
AU - Iwaki, Satoru
AU - Kubo, Hidetoshi
AU - Kurosawa, Shunsuke
AU - Miuchi, Kentaro
AU - Nakamura, Kiseki
AU - Nishimura, Hironobu
AU - Parker, Joseph D.
AU - Sawano, Tatsuya
AU - Takada, Atsushi
AU - Tanimori, Toru
AU - Taniue, Kojiro
AU - Ueno, Kazuki
N1 - Funding Information:
This work is supported by a Grant-in-Aid in Scientific Research from the Japan Ministry of Education, Science, Sports and Technology, “Ground Research Announcement for Space Utilization” promoted by Japan Space Forum, SENTAN of the Japan Science and Technology Agency, and the Global COE Program “The Next Generation of Physics, Spun from Universality and Emergence”.
PY - 2011/2/2
Y1 - 2011/2/2
N2 - We have developed an Electron-Tracking Compton Camera (ETCC) for medical imaging and MeV gamma-ray astronomy. The ETCC consists of a gaseous Time Projection Chamber (μ-TPC) and pixel scintillator arrays. To improve the detection efficiency, we have optimized the gas mixture in the μ-TPC and operated the ETCC at high pressure. Basic characteristics such as the gas gain, drift velocity, energy resolution, and position resolution of the μ-TPC were examined, and using this optimization, both the efficiency and the angular resolution of the ETCC were measured. We achieved a steady gas gain of ∼20,000 in Ar/CF4/isoC4H10 (54:40:6) at 1.4 atm. The diffusion constant in Ar/CF4/isoC4H10 (54:40:6) at 1.4 atm was ∼2 times better than in Ar/C2H 6 (90:10) at 1 atm. The efficiency in Ar/CF4/isoC 4H10 (54:40:6) at 1.4 atm was also ∼2 times higher than in Ar/C2H6 (90:10) at 1 atm.
AB - We have developed an Electron-Tracking Compton Camera (ETCC) for medical imaging and MeV gamma-ray astronomy. The ETCC consists of a gaseous Time Projection Chamber (μ-TPC) and pixel scintillator arrays. To improve the detection efficiency, we have optimized the gas mixture in the μ-TPC and operated the ETCC at high pressure. Basic characteristics such as the gas gain, drift velocity, energy resolution, and position resolution of the μ-TPC were examined, and using this optimization, both the efficiency and the angular resolution of the ETCC were measured. We achieved a steady gas gain of ∼20,000 in Ar/CF4/isoC4H10 (54:40:6) at 1.4 atm. The diffusion constant in Ar/CF4/isoC4H10 (54:40:6) at 1.4 atm was ∼2 times better than in Ar/C2H 6 (90:10) at 1 atm. The efficiency in Ar/CF4/isoC 4H10 (54:40:6) at 1.4 atm was also ∼2 times higher than in Ar/C2H6 (90:10) at 1 atm.
KW - CF
KW - Compton imaging
KW - GEM
KW - Gaseous detector
KW - Time projection chamber
KW - μ-PIC
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U2 - 10.1016/j.nima.2010.06.305
DO - 10.1016/j.nima.2010.06.305
M3 - Article
AN - SCOPUS:79251599163
VL - 628
SP - 150
EP - 153
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
IS - 1
ER -