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| PT01 |
Beam Position And Phase Measurements Using A FPGA For The Processing Of The Pick-Ups Signals
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169 |
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- G.A. Naylor, E. Plouviez, G.F. Penacoba
ESRF, European Synchrotron Radiation Facility, Grenoble, France
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We have implemented the signal processing needed to derive the transverse
beam position and the beam phase from the signals of a four electrodes
BPM block on a FPGA (field programmable gate array). The high processing
rate of a FPGA allows taking the full benefit of the high data
acquisition rate of the most recent ADC circuits. In addition, it is
possible to implement on a FPGA a processing algorithm exactly tailored
to the measurement of the beam parameters. The efficiency of the signal
processing has also been improved by a careful choice of the frequency of
the sampling clock and of the RF front-end local oscillator, which are
derived from the storage ring RF frequency. This paper describes the BPM,
the RF front-end electronics and the FPGA algorithm. It presents some of
the application of this BPM at ESRF and gives measurement results.
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