A soft gamma-ray concentrator using thin-film multilayer structures

Bloser, Peter F.; Aliotta, Paul H.; Echt, Olof; Krzanowski, James E.; Legere, Jason S.; McConnell, Mark L.; Shirazi, Farzane; Tsavalas, John G.; Wong, Emily N.; Kippen, R. M.

doi:10.1117/12.2188510

Cited by 3 publications

(2 citation statements)

References 32 publications

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“…This technique would allow γ-rays to be concentrated to a small, shielded detector in the focal plane. 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.…”

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.

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show abstract

“…This technique would allow γ-rays to be concentrated to a small, shielded detector in the focal plane. 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.…”

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