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| WEPC24 |
A Self Calibrating Real Time Multi-Channel Profile Monitor for the Isis Proton Synchrotron
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364 |
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- S. J. Payne, P. G. Barnes, G. M. Cross, A. Pertica, S. A. Whitehead
STFC/RAL/ISIS, Chilton, Didcot, Oxon
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A (+ion) gas ionisation profile monitor (GIPM) has been developed at the Rutherford Appleton Laboratory to capture 'real time' beam profile data within the accelerating ring of the 800MeV ISIS proton sychrotron. The GIPM uses an array of 40 Channeltron detectors, operating at a gain of ~104, to measure the transverse beam profile in the horizontal plane. The data obtained is an average of two rotations of the beam bunch, a limitation due soley to the speed of the +ions. Fast electronics and a multi-channel PXI / LabView data acquisition system are used to simultaneously process and display the 40 channels of beam profile information. Variations in the Channeltrons gain are dealt with using an independent motor driven +ion detector. The beam profiles obtained from this single detector are stored and used as a calibration file to correct data from the new multi-channel profile monitor.
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