Title :
Bunch lengthening observed using real-time bunch-length monitor in the TRISTAN AR
Author_Institution :
KEK, Nat. Lab. for High Energy Phys., Ibaraki, Japan
Abstract :
A new type of a bunch length monitor, detecting two frequency components of a beam spectrum, has been installed in the TRISTAN Accumulation Ring (AR). Calibration of the monitor was carried out with the calculated natural bunch length at a low beam current. Bunch lengthening was measured as a function of the beam current. When the beam current increased, a sudden blowup of the bunch length was observed together with strong coherent oscillations. It was also observed that the blowup exhibited hysteresis when the beam current decreased, which suggested a strong nonlinear force in the bunch lengthening process
Keywords :
beam handling techniques; calibration; particle beam diagnostics; storage rings; TRISTAN Accumulation Ring; beam current; bunch length blowup; bunch length monitor; bunch lengthening; calibration; oscillations; Acceleration; Attenuation measurement; Attenuators; Calibration; Charge measurement; Current measurement; Frequency; Length measurement; Monitoring; Synchrotrons;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309643
