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Influence of Magnetic Fields on the IRF of High-Speed Detectors for TCSPC

We tested bh HPM hybrid detectors and bh PMCS PMT detectors for IRF changes induced by external magnetic fields. The effects were found surprisingly small. For a magnetic-field strength on the order of 100 Gauss the shift in the IRFs was between 1.75 ps and 14.5 ps compared to the field-free case, depending on the direction of the field. The FWHM changed from 16.4 ps to 18.4 ps for the HPM and 97 ps to 109 ps for the PMCS.

Keywords: TCSPC, Detectors, Magnetic Field

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