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CT08 |
Capabilities of the ELETTRA/SLS Multibunch Feedback Electronics
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74 |
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- M. Dehler, R. Kramert, P. Pollet, D. Bulfone, M. Lonza
PSI, Paul Scherrer Institut, Villigen, Switzerland
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Due to the unavailability of commercial ADC and DAC boards, first
commissioning of the transverse multi bunch feedback was done in the last
year using loaned equipment from Sincrotrone Trieste. In order to remedy
that situation, development of ADC and DAC VME boards was started. The
boards do a 500 MS/s data conversion with an 8 bit resolution. The ADC
and DAC circuits are separate modules containing their own one to four
de-/multiplexing electronic reducing the data rate to 125 MS/sec. The
following stage being a common design to both ADC and DAC allows data
recording and play back using on board RAM and allows freely programmable
multiplexing/demultiplexing ratios of one to five to one to twelve. The
digital data streams flow via Front Panel Digital Ports (FPDP). A special
design criterion were low system latencies ensuring a high feedback
efficiency. Apart from lab tests, we report on full feedback system test
and show the feedback performance in the transverse and longitudinal
planes.
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