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PT27 |
A 40 MHz Bunch by Bunch Intensity Measurement for the CERN SPS and LHC
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237 |
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- H. Jakob, L. Jensen, R. Jones, J.J. Savioz
CERN, Geneva, Switzerland
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A new acquisition system has been developed to allow the measurement of
the individual intensity of each bunch in a 40 MHz bunch train. Such a
system will be used for the measurement of LHC type beams after
extraction from the CERN-PS right through to the dump lines of the
CERN-LHC. The method is based on integrating the analogue signal supplied
by a Fast Beam Current Transformer at a frequency of 40 MHz. This has been
made possible with the use of a fast integration ASIC developed by the
University of Clermont-Ferrand, France, for the LHC-b pre-shower
detector. The output of the integrator is digitised using a 12-bit ADC
and fed into a Digital Acquisition Board (DAB) that was originally
developed by TRIUMF, Canada, for use in the LHC orbit system. A full
system set-up was commissioned during 2002 in the CERN-SPS, and following
its success will now be extended in 2003 to cover the PS to SPS transfer
lines and the new TT40 LHC extraction channel.
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