Session
Weekend Session IV: Next on the Pad – Research & Academia
Location
Utah State University, Logan, UT
Abstract
We are planning to launch a 50kg-class satellite named GRAPHIUM, equipped with a small, high-performance Hybrid Compton Camera (INSPIRE) for MeV gamma-ray astronomy. Since the launch of the COMPTEL satellite in 1991, there have been limited observations in the MeV gamma-ray band. However, this energy range is crucial for studying nucleosynthesis processes. GRAPHIUM aims to conduct a wide-area survey of nuclear gamma rays from the galactic plane and includes gamma-ray observaitons of solar flares as one of its objectives. Equipped with a hybrid Compton camera system, GRAPHIUM can perform simultaneous X-ray and gamma-ray imaging. This is achieved by integrating the features of both Compton and pinhole cameras within a single detector system. The system includes two sensor layers of large-area Silicon Photomultiplier (SiPM) arrays, optically coupled with GAGG scintillators. This configuration enables simultaneous imaging of gamma rays from 30 to 200 keV in pinhole mode and from 200 to 3000 keV in Compton mode. Regarding the Engineering Model of this detector, each layer's two-dimensional imaging was evaluated using a source. Additionally, temperature resistance and radiation resistance tests were conducted on the data acquisition board. Additionally, temperature resistance and radiation resistance tests were conducted on the data acquisition board. Additionally, temperature resistance and radiation resistance tests were conducted on the data acquisition board. The GRAPHIUM satellite is being developed as the successor to PETREL, which is currently being prepared for launch, with a planned launch in 2027.
[MeV Gamma-Ray Detector on the 50-kg Class Satellite]
Utah State University, Logan, UT
We are planning to launch a 50kg-class satellite named GRAPHIUM, equipped with a small, high-performance Hybrid Compton Camera (INSPIRE) for MeV gamma-ray astronomy. Since the launch of the COMPTEL satellite in 1991, there have been limited observations in the MeV gamma-ray band. However, this energy range is crucial for studying nucleosynthesis processes. GRAPHIUM aims to conduct a wide-area survey of nuclear gamma rays from the galactic plane and includes gamma-ray observaitons of solar flares as one of its objectives. Equipped with a hybrid Compton camera system, GRAPHIUM can perform simultaneous X-ray and gamma-ray imaging. This is achieved by integrating the features of both Compton and pinhole cameras within a single detector system. The system includes two sensor layers of large-area Silicon Photomultiplier (SiPM) arrays, optically coupled with GAGG scintillators. This configuration enables simultaneous imaging of gamma rays from 30 to 200 keV in pinhole mode and from 200 to 3000 keV in Compton mode. Regarding the Engineering Model of this detector, each layer's two-dimensional imaging was evaluated using a source. Additionally, temperature resistance and radiation resistance tests were conducted on the data acquisition board. Additionally, temperature resistance and radiation resistance tests were conducted on the data acquisition board. Additionally, temperature resistance and radiation resistance tests were conducted on the data acquisition board. The GRAPHIUM satellite is being developed as the successor to PETREL, which is currently being prepared for launch, with a planned launch in 2027.
