Ring diagnostics and consistency test of the model for the AGS Booster

From a systematic analysis of readings of the beam position monitors in the AGS Booster ring, combined with the transfer matrices between a few locations in the ring, calculated with MAD, the consistency of the model of the lattice has been tested. This technique has enabled us to (i) detect errors in the machine that subsequent survey during shutdown has confirmed, and (ii) to measure the actual circulating beam momentum offset. The method has proved rather general and convenient for accelerator diagnostics as part of a model-based accelerator control system and extensions are suggested.<
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