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- Title
Imaging low-energy positron beams in real-time with unprecedented resolution.
- Authors
Berghold, Michael; Burwitz, Vassily Vadimovitch; Mathes, Lucian; Hugenschmidt, Christoph; Guatieri, Francesco
- Abstract
Particle beams focused to micrometer-sized spots play a crucial role in forefront research using low-energy positrons. Their expedient and wide application, however, requires highly-resolved, fast beam diagnostics. We have developed two different methods to modify a commercial imaging sensor to make it sensitive to low-energy positrons. The first method consists in removing the micro-lens array and Bayer filter from the sensor surface and depositing a phosphor layer in their place. This procedure results in a detector capable of imaging positron beams with energies down to a few tens of eV, or an intensity as low as 35 e + / s/mm 2 when the beam energy exceeds 10 keV . The second approach omits the phosphor deposition; with the resulting device we succeeded in detecting single positrons with energies upwards of 6 keV and efficiency up to 93%. The achieved spatial resolution of 0.97 μ m is unprecedented for real-time positron detectors.
- Subjects
POSITRON beams; IMAGE sensors; SPATIAL resolution; POSITRONS; PARTICLE beams; IMAGE converters; PHOSPHORS
- Publication
Scientific Reports, 2023, Vol 13, Issue 1, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/s41598-023-45588-0