Publications (2)0 Total impact
-
Conference Proceeding: Transverse feedback development at SOLEIL
[show abstract] [hide abstract]
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 -
Conference Proceeding: Beam instability observations and analysis at SOLEIL
[show abstract] [hide abstract]
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