Absolute Beam-Charge Measurement Tecnhiques for Single-Bunch Electron Beams

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Although beam-charge monitors with electromagnetic pickups are widely used, accurate calibration methods for absolute beam charge have been little discussed previously. Several calibration methods can be applied to other linear accelerators generating pulsed beams with pulse widths in the range of nanoseconds or less. A new method for beam-charge calibration using beam-induced fundamental longitudinal wakefield, which does not depend upon the pulse characteristics of the beam in principle, but depends only upon the amount of beam charge. Another method for absolute beam-charge calibration using a Faraday cup (FC) has been performed because the response does not depend on the pulse width of the beams.

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