Journal
JOURNAL OF INSTRUMENTATION
Volume 15, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1748-0221/15/03/P03027
Keywords
Very low-energy charged particle detectors; Beam dynamics; Beam-line instrumentation (beam position and profile monitors; beam-intensity monitors; bunch length monitors); Detector alignment and calibration methods (lasers, sources, particle-beams)
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Nuclear emulsions are a formidable tool for detecting charged particles with sub-micrometric spatial resolution, a feature which is essential in quantum interferometry experiments with antimatter. In this context, we have tested the sensitivity of such a detector, devoid of the usual protective layer, with very low energy positrons, that is in the range 0.2-17 keV. The results show that emulsions are sensitive to positrons with energy below 1 keV. Their detection efficiency increases as a function of the energy and it tends to saturate over similar to 5 keV. This demonstrates the feasibility of using this type of detector in low energy regime and defines the limits of use for future gravitational studies with antimatter.
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