Compton camera is a radiation detector that uses the kinematics of Compton scattering to estimate the direction of the gamma-ray incident. Compton camera has been used in many applications such as astronomy, medical, nuclear industry, and security. High time resolution in a Compton camera is essential to distinguish the incoming event in the detector. In this work, we developed a Compton camera using a fast decay scintillator and a high time resolution front end circuit to get a high-performance detector. The detector used an 8×8 multi-pixel photon counter (MPPC) array, which individually couple with a 2.5×2.5×5 mm3 GFAG (Gadolinium Fine Aluminum Gallate) scintillator. For processing the analog signal from the MPPC scintillators, the 64 channel ASIC (Application-Specific Integrated Circuit) is used. Each channel in the ASIC circuit consists of a pre-amplifier, shaper, monostable multivibrator, and slew-rate time over threshold. The ASIC will provide the digital output signal that contains the timing and energy information. The high-time resolution data acquisition circuit (PETnet) based on FPGA is used to acquire energy and time data from ASIC.

1.
A.
Koide
 et al,
Sci. Rep.
, vol.
8
, no.
1
, pp.
1
9
,
2018
.
2.
H.
Hosokoshi
 et al,
Sci. Rep.
, vol.
9
, no.
1
, pp.
1
9
,
2019
.
3.
V.
Ilisie
 et al,
Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip.
, vol.
895
, no. January, pp.
74
83
,
2018
.
4.
K.
Shimazoe
 et al,
Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip.
,
2018
.
5.
J.
Kataoka
 et al,
Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip.
, vol.
784
, pp.
248
254
,
2015
.
6.
Y.
Sato
 et al,
J. Nucl. Sci. Technol.
, vol.
55
, no.
9
, pp.
965
970
,
2018
.
7.
Y.
Sato
,
Y.
Terasaka
,
W.
Utsugi
,
H.
Kikuchi
,
H.
Kiyooka
, and
T.
Torii
,
J. Nucl. Sci. Technol.
, vol.
56
, no.
9–10
, pp.
801
808
,
2019
.
8.
J.
Iwanowska-Hanke
 et al,
Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip.
, vol.
979
, no. July, p.
164464
,
2020
.
9.
M. N.
Ullah
 et al,
Nucl. Instruments Methods Phys. Res. Sect. A Accel. Spectrometers, Detect. Assoc. Equip.
, vol.
911
, no. October, pp.
115
122
,
2018
.
10.
Y.
Nakamura
 et al,
Phys. Med. Biol.
, vol.
61
, no.
15
, pp.
5837
5850
,
2016
.
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