C. Mariette

Publications (2)0 Total impact

• Source

  Available from: cern.ch

  Conference Proceeding: Transverse feedback development at SOLEIL

  R. Nagaoka, L. Cassinari, J.C. Denard, J.M. Filhol, N. Hubert, M.P. Level, P. Marchand, C. Mariette, F. Ribeiro, R. Sreedharan, T. Nakamura, K. Kobayashi
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  ABSTRACT: The paper describes the bunch by bunch transverse feedback system developed and implemented at SOLEIL. In order to cope with diverse beam conditions involving multibunch and single bunch instabilities, a digital system has been developed. While a BPM, a RF frontend and a stripline developed in house are used in the feedback chain, the SPring-8 solution was chosen for the digital processor for its proven performance elsewhere. The commissioning of the system as well as attained feedback performance is presented.
  Particle Accelerator Conference, 2007. PAC. IEEE; 07/2007
• Source

  Available from: kek.jp

  Conference Proceeding: Beam instability observations and analysis at SOLEIL

  R. Nagaoka, M.P. Level, L. Cassinari, M.E. Couprie, M. Labat, C. Mariette, A. Rodriguez, R. Sreedharan
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  ABSTRACT: The paper describes measurement and analysis of beam instability made at SOLEIL in comparison with the expectation using numerically estimated impedance budget. A multibunch beam is found to be under a strong influence of resistive-wall and fast beam-ion instabilities, in a way that largely depends on the local position in a bunch train. For a single bunch, the measured reactive impedance turns out to be larger by nearly a factor of two than calculated in all three planes. The roughness impedance due to NEG coating is assessed as a possible cause.
  Particle Accelerator Conference, 2007. PAC. IEEE; 07/2007