A transmission time detector for low energy light ions

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Abstract

Transmission time detectors have been developed taking advantage of the isochronous transport of the electrons stripped from a thin carbon foil to microchannel plate electron multipliers after a 90° electrostatic deflection off the beam axis. The overall resolution of a time of flight measurement between two such detectors has been found to be typically 150 ps. Their efficiencies and response functions have been measured to 5.48 MeV alpha particles and a simple model has been adopted to evaluate their detection efficiency versus threshold for low energy light ions.

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