Title :
Location and correction of 60 Hz in the CEBAF injector
Author :
Legg, R. ; Douglas, D. ; Krafft, G.A. ; Saulter, Q.
Author_Institution :
CEBAF, Newport News, VA, USA
Abstract :
CEBAF produces a continuous electron beam with an emittance of 2-3 nm-Rad. Transverse low frequency magnetic oscillations act to dilute this emittance. These fields are typically associated with AC line conductors. The CEBAF injector is approximately 40 m long. To locate the source(s) of the beam motion, measured offsets were back propagated along the beamline using the DIMAD model. Field measurements were then made at the calculated field source positions and correlated with the measured offsets. Corrections and final beam measurements were made to verify the corrections
Keywords :
electron accelerators; particle beam injection; 40 m; 60 Hz; AC line conductors; CEBAF injector; DIMAD model; backpropagation; beam motion; beamline; continuous electron beam; emittance; field measurements; field source positions; final beam measurements; frequency correction; frequency location; offsets; transverse low frequency magnetic oscillations; Acceleration; Apertures; Equations; Frequency measurement; Lattices; Magnetic field measurement; Motion measurement; Phase measurement; Position measurement; Pulse measurements;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505391
