Performance simulation of the soft gamma-ray concentrator

Shirazi, Farzane; Bloser, Peter F.; Legere, Jason S.; McConnell, Mark L.

doi:10.1117/1.jatis.6.2.024001

Cited by 2 publications

(2 citation statements)

References 34 publications

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“…48 Since the photons can reflect multiple times within the structure, much larger bending angles can be achieved than for mirrors or Laue diffraction optics, resulting in much shorter focal lengths needed. Shirazi et al 49 examined the 20 cm diameter lens constructed with Ir/Si that produced a ∼1 cm diameter focal spot over a <10 m focal length and a 50 to 430 keV energy range. The channeling process is effective over a broad energy band, as long as the angle of incidence is less than a certain critical angle and the photons are not excessively absorbed.…”

Section: Channeling Opticsmentioning

confidence: 99%

511-CAM mission: a pointed 511 keV gamma-ray telescope with a focal plane detector made of stacked transition edge sensor microcalorimeter arrays

Shirazi

Gau

Hossen

et al. 2023

J. Astron. Telesc. Instrum. Syst.

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The 511 keV γ-ray emission from the galactic center region may fully or partially originate from the annihilation of positrons from dark matter particles with electrons from the interstellar medium. Alternatively, the positrons could be created by astrophysical sources, involving exclusively standard model physics. We describe here a new concept for a 511 keV mission called 511-CAM (511 keV gamma-ray camera using microcalorimeters) that combines focusing γ-ray optics with a stack of transition edge sensor microcalorimeter arrays in the focal plane. The 511-CAM detector assembly has a projected 511 keV energy resolution of 390 eV full width half maximum or better, and improves by a factor of at least 11 on the performance of state-of-the-art Ge-based Compton telescopes. Combining this unprecedented energy resolution with sub-arcmin angular resolutions afforded by Laue lens or channeling optics could make substantial contributions toward identifying the origin of the 511 keV emission through discovering and characterizing point sources and measuring line-of-sight velocities of the emitting plasmas.

show abstract

Section: Channeling Opticsmentioning

confidence: 99%

511-CAM mission: a pointed 511 keV gamma-ray telescope with a focal plane detector made of stacked transition edge sensor microcalorimeter arrays

Shirazi

Gau

Hossen

et al. 2023

J. Astron. Telesc. Instrum. Syst.

View full text Add to dashboard Cite

show abstract

“…50 Since the photons can reflect multiple times within the structure, much larger bending angles can be achieved than for mirrors or Laue diffraction optics, resulting in much shorter focal lengths. Shirazi et al 51 examined the 20 cm diameter lens constructed with Ir/Si that produced a ∼1 cm diameter focal spot over <10 m focal length and a 50-430 keV energy range. The channeling process is effective over a broad energy band, as long as the angle of incidence is less than the critical angle and the photons are not excessively absorbed.…”

Section: Channeling Opticsmentioning

confidence: 99%

The 511-CAM Mission: A Pointed 511 keV Gamma-Ray Telescope with a Focal Plane Detector Made of Stacked Transition Edge Sensor Microcalorimeter Arrays

Shirazi¹,

Hossen²,

Becker³

et al. 2022

Preprint

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The 511 keV γ-ray emission from the galactic center region may fully or partially originate from the annihilation of positrons from dark matter particles with electrons from the interstellar medium. Alternatively, the positrons could be created by astrophysical sources, involving exclusively standard model physics. We describe here a new concept for a 511 keV mission called 511-CAM (511 keV gamma-ray CAmera using Micro-calorimeters) that combines focusing γ-ray optics with a stack of Transition Edge Sensor (TES) microcalorimeter arrays in the focal plane. The 511-CAM detector assembly has a projected 511 keV energy resolution of 390 eV Full Width Half Maximum (FWHM) or better, and improves by a factor of at least 11 on the performance of state-of-the-art Ge-based Compton telescopes. Combining this unprecedented energy resolution with sub-arcmin angular resolutions afforded by Laue lens or channeling optics could make substantial contributions to identifying the origin of the 511 keV emission by discovering and characterizing point sources and measuring line-of-sight velocities of the emitting plasmas.

show abstract

Performance simulation of the soft gamma-ray concentrator

Cited by 2 publications

References 34 publications

511-CAM mission: a pointed 511 keV gamma-ray telescope with a focal plane detector made of stacked transition edge sensor microcalorimeter arrays

511-CAM mission: a pointed 511 keV gamma-ray telescope with a focal plane detector made of stacked transition edge sensor microcalorimeter arrays

The 511-CAM Mission: A Pointed 511 keV Gamma-Ray Telescope with a Focal Plane Detector Made of Stacked Transition Edge Sensor Microcalorimeter Arrays

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