The 511-CAM Mission: A Pointed 511 keV Gamma-Ray Telescope with a Focal Plane Detector Made of Stacked Transition Edge Sensor Microcalorimeter Arrays
arXiv:2206.14652 · doi:10.1117/1.JATIS.9.2.024006
Abstract
The 511 keV gamma-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 gamma-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.
arXiv comment21 pages, 11 figures, 2 tables; revised manuscript that addressed the referee's comments
References in corpus (19)
- The all-sky distribution of 511 keV electron-positron annihilation emission
- The 511 keV emission from positron annihilation in the Galaxy
- Positron annihilation spectrum from the Galactic Center region observed by SPI/INTEGRAL
- Experimental evidence for bulk superconductivity in pure Bismuth single crystal at ambient pressure
- Positron annihilation signatures associated with the outburst of the microquasar V404 Cygni
- Relativistic Magnetic Reconnection in Electron-Positron-Proton Plasmas: Implications for Jets of Active Galactic Nuclei
- Positron annihilation spectrum from the Galactic Centre region observed by SPI/INTEGRAL, revisited: annihilation in a cooling ISM?
- XL-Calibur -- a second-generation balloon-borne hard X-ray polarimetry mission
- Ruling out the light WIMP explanation of the galactic 511 keV line
- Constraints on a mixed model of dark matter particles and primordial black holes from the Galactic 511 keV line
- Search for 511 keV Emission in Satellite Galaxies of the Milky Way with INTEGRAL/SPI
- Eliminating the non-Gaussian spectral response of X-ray absorbers for transition-edge sensors
- The 511 keV Excess and Primordial Black Holes
- The design and performance of the XL-Calibur anticoincidence shield
- Microstructure analysis of bismuth absorbers for transition-edge sensor X-ray microcalorimeters
- 511 keV Line Emission from Nearby Spherical Dwarf Galaxies
- Properties of AGN coronae in the NuSTAR era
- A stratified jet model for AGN emission in the two-flow paradigm
- Constraining dark matter by the 511 keV line