Title :
Beam-based monitoring of the SLC linac optics with a diagnostic pulse
Author :
Assmann, R.W. ; Decker, F.J. ; Hendrickson, L.J. ; Phinney, N. ; Siemann, R.H. ; Underwood, K.K. ; Woodley, M.
Author_Institution :
Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
The beam optics in a linear accelerator may be changed significantly by variations in the energy and energy spread profile along the linac. In particular, diurnal temperature swings in the SLC klystron gallery perturb the phase and amplitude of the accelerating RF fields. If such changes are not correctly characterized, the resulting errors will cause phase advance differences in the beam optics. In addition RF phase errors also affect the amplitude growth of betatron oscillations. We present an automated, simple procedure to monitor the beam optics in the SLC linac routinely and non-invasively. The measured phase advance and oscillation amplitude is shown as a function of time and is compared to the nominal optics
Keywords :
accelerator RF systems; electron accelerators; electron optics; linear colliders; particle beam diagnostics; particle beam stability; RF phase errors; SLC klystron gallery; SLC linac optics; accelerating RF fields; beam optics; beam-based monitoring; betatron oscillations; diagnostic pulse; diurnal temperature swings; energy spread profile; linear accelerator; phase advance; Acceleration; Error correction; Klystrons; Linear accelerators; Linear particle accelerator; Monitoring; Optical beams; Particle beams; Radio frequency; Temperature;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.749708
