PRELIMINARY BEAM TEST RESULTS OF THE TLS LONGITUDINAL DAMPER WITH HIGH PERFORMANCE DSP MODULES

A bunch-by-bunch longitudinal feedback system that based on the state-of-the-art technology in the DSP industry is being developed for the Taiwan Light Source (TLS). Special design of the fast digital electronics provides the flexibility of using high performance VME DSP modules that are recently commercially available. Each of these modules has four 200 MHz fixed point processors with a highly parallel and deterministic architecture in CPU core design. With an aggregate progressing speed up to several thousands MIPS per board, total number of DSP chips required is significantly reduced. Testing of the system on the TLS storage ring is in progress. Preliminary beam test results on longitudinal coupled-bunch oscillation observations and feedback are reported.

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