Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
Paper
Portable faraday cup for nonvacuum proton beams
Abstract
A portable Faraday cup design is described for the accurate measurement of large-diameter, low-current, and high-energy proton beams traveling in air. The unit has been tested with protons from 4 to 300 MeV. The unit has an accuracy of 10% for beams of 1 pA, improving to about 2% accuracy for ion currents of 20 pA to 1 μA.
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