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
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
UR - http://www.scopus.com/inward/record.url?scp=79251599163&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79251599163&partnerID=8YFLogxK
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 -