Development of the ComPair gamma-ray telescope prototype

Shy, Daniel; Kierans, Carolyn; Cannady, Nicolas; Caputo, R.; Griffin, Sean; Grove, Eric; Hays, E.; Kong, Emily; Kirschner, Nicholas; Liceaga-Indart, I.; McEnery, J. E.; Mitchell, J. W.; Моисеев, А. А.; Parker, Lucas; Perkins, J. S.; Phlips, Bernard F.; Sasaki, Makoto; Schoenwald, A.; Sleator, Clio; Smith, Jacob; Smith, Lucas; Wasti, Sambid; Woolf, Richard S.; Wulf, E.; Zajczyk, A.

doi:10.1117/12.2628811

Cited by 7 publications

(2 citation statements)

References 46 publications

(70 reference statements)

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“…In order to build to full implementation in AMEGO-X, an AMEGO-X prototype is planned. This prototype is a combination of many efforts, including: AstroPix (as a novel tracker), a cesium-iodide calorimeter, the ComPair balloon instrument [9], and Compton event reconstruction improvements. The AMEGO-X prototype (Fig.…”

Section: Pos(pixel2022)020mentioning

confidence: 99%

AstroPix: CMOS pixels in space

Caputo¹,

Steinhebel²,

Fleischhack³

et al. 2023

Proceedings of 10th International Workshop on Semiconductor Pixel Detectors for Particles and Imaging — PoS(Pixel2022)

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Space-based gamma-ray telescopes such as the Fermi Large Area Telescope have used single sided silicon strip detectors to measure the position of charged particles produced by incident gamma rays with high resolution. At energies in the Compton regime and below, two dimensional position information within a single detector is required. Double sided silicon strip detectors are one option; however, this technology is difficult to fabricate and large arrays are susceptible to noise. This work outlines the development and implementation of monolithic CMOS active pixel silicon sensors, AstroPix, for use in future gamma-ray telescopes. Based upon detectors designed using the HVCMOS process at the Karlsruhe Institute of Technology, AstroPix has the potential to maintain the high energy and angular resolution required of a medium-energy gammaray telescope while reducing noise with the dual detection-and-readout capabilities of a CMOS chip. The status of AstroPix development and testing as well as outlook for application in future telescopes is presented.

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Section: Pos(pixel2022)020mentioning

confidence: 99%

AstroPix: CMOS pixels in space

Caputo¹,

Steinhebel²,

Fleischhack³

et al. 2023

Proceedings of 10th International Workshop on Semiconductor Pixel Detectors for Particles and Imaging — PoS(Pixel2022)

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“…Performance of CZT detectors Makoto Sasaki depending on the detector design. The CZT Imaging Calorimeter for the ComPair instrument [3] is shown on Figure 2 c, where the crates are arranged in a 3×3 array to cover a 90 mm × 90 mm active area. We have evaluated the performance of the CZT Imaging Calorimeter using the recently developed IDEAS GDS-100 readout system with an IDM-121 waveform sampling ASIC (Figure 3).…”

Section: Pos(icrc2023)761mentioning

confidence: 99%

Performance of an array of 6x6x20 mm3 virtual Frisch-grid CdZnTe detectors with a waveform sampling readout system

Sasaki,

Bolotnikov",

Cannady"

et al. 2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

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Arrays of CdZnTe (CZT) bars with high spatial and energy resolution are an enabling technology for future space missions, such as the image plane detector of the Galactic Explorer with a Coded Aperture Mask Compton Telescope (GECCO). GECCO will explore the medium-energy (100 keV-10 MeV) 𝛾-ray sky, which is among the least covered windows to the Universe with a massive potential for discovery. We have integrated an array of 6 × 6 × 20 𝑚𝑚 3 virtual Frisch-grid (VFG) CZT detectors, measuring signals from the cathodes, anodes, and pads on each of the four sides of each bar. The VFG CZT detector is read out with an IDEAS GDS-100 waveform sampling readout system to optimize the signal processing and event reconstruction. We evaluated the energy and position resolution of the integrated VFG CZT array with a 137 Cs source and successfully demonstrated better than 1% energy resolution and finer than 1 mm position resolution at 662 keV. Furthermore, we carried out a beam test at the High Intensity Gamma-ray Source (HIGS) at Duke University to investigate the performance of the system for higher energy 𝛾-rays. Together with the basic performance obtained from the 137 Cs source, we present here those results from the beam test with various 𝛾-ray energies up to 8 MeV.

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Electromagnetic signatures of white dwarf collisions in AGN discs

Zhang

Luo

et al. 2023

Monthly Notices of the Royal Astronomical Society

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In the inner region of the disc of an active galactic nucleus (AGN), the collision of two white dwarfs (WDs) through Jacobi capture might be inevitable, leading to a Type Ia supernova (SN Ia) explosion. This transient event, influenced by the disc gas and the gravity of the supermassive black hole (SMBH), exhibits distinct characteristics compared with normal SNe Ia. The energy of the explosion is mainly stored in the ejecta in the form of kinetic energy. Typically, the ejecta is not decelerated effectively by the AGN disc and rushes rapidly out of the AGN disc. However, under the influence of the SMBH, most of the ejecta falls back toward the AGN disc. As the fallback ejecta becomes more dispersed, it interacts with the disc gas, converting its kinetic energy into thermal energy. This results in a high-energy transient characterized by a rapid initial rise followed by a decay with L∝t−2.8. The time-scale of the transient ranges from hours to weeks, depending on the mass of the SMBH. This process generates high-energy radiation spanning from hard X-rays to the soft γ range. Additionally, the subsequent damage to the disc may result in changing-look AGNs. Moreover, the falling back of SNe Ia ejecta on to the AGN disc significantly increases the metallicity of the AGN and can even generate heavy elements within AGN discs.

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Development of the ComPair gamma-ray telescope prototype

Cited by 7 publications

References 46 publications

AstroPix: CMOS pixels in space

AstroPix: CMOS pixels in space

Performance of an array of 6x6x20 mm3 virtual Frisch-grid CdZnTe detectors with a waveform sampling readout system

Electromagnetic signatures of white dwarf collisions in AGN discs

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