TY - BOOK
T1 - The Bunch-by-Bunch Feedback System in the MAX IV 3 GeV Ring
AU - Olsson, David
AU - Malmgren, Lars
AU - Karlsson, Anders
PY - 2017/10/18
Y1 - 2017/10/18
N2 - The MAX IV facility in Lund, Sweden consists of two storage rings for production of synchrotron radiation. The larger 3 GeV ring has been delivering light to the first users since November 2016, while the smaller 1.5 GeV ring is being commissioned. Coupled-Bunch Mode Instabilities (CBMIs) have been observed in both rings, and they have a degrading effect on the beam quality since they increase the effective emittance and the energy spread. In order to suppress CBMIs, a digital Bunch-By-Bunch (BBB) feedback system has been commissioned in the 3 GeV ring. The feedback in the three planes has this far been two provided by two striplines kickers. A waveguide overloaded cavity kicker, dedicated for feedback in the longitudinal plane, will soon be commissioned. Apart from applying negative feedback, the BBB feedback system is a comprehensive diagnostic tool. The design of the feedback kickers and the implementation of the BBB feedback system in the 3 GeV ring are presented in this report. Initial results from instability studies are also discussed.
AB - The MAX IV facility in Lund, Sweden consists of two storage rings for production of synchrotron radiation. The larger 3 GeV ring has been delivering light to the first users since November 2016, while the smaller 1.5 GeV ring is being commissioned. Coupled-Bunch Mode Instabilities (CBMIs) have been observed in both rings, and they have a degrading effect on the beam quality since they increase the effective emittance and the energy spread. In order to suppress CBMIs, a digital Bunch-By-Bunch (BBB) feedback system has been commissioned in the 3 GeV ring. The feedback in the three planes has this far been two provided by two striplines kickers. A waveguide overloaded cavity kicker, dedicated for feedback in the longitudinal plane, will soon be commissioned. Apart from applying negative feedback, the BBB feedback system is a comprehensive diagnostic tool. The design of the feedback kickers and the implementation of the BBB feedback system in the 3 GeV ring are presented in this report. Initial results from instability studies are also discussed.
M3 - Report
VL - 7253
T3 - Technical Report LUTEDX/(TEAT-7253)/1-48/(2017)
BT - The Bunch-by-Bunch Feedback System in the MAX IV 3 GeV Ring
PB - MAX-lab, Lund University
ER -