Emittance growth and energy loss due to coherent synchrotron radiation in a bunch compressor

Emittance growth and energy loss due to coherent synchrotron radiation in a bunch compressor

Blog Article

Electron bunches of high charge (up to 10 nC) are compressed in length in the Compact Linear Collider Test Facility magnetic chicane to less than 0.4 Lift mm rms.The short bunches radiate coherently in the chicane magnetic field, and the horizontal and longitudinal phase space density distributions are affected.This paper reports the results of beam emittance and momentum measurements.

Horizontal and vertical emittances and momentum spectra were measured for different bunch compression factors and bunch charges.In particular, for 10 nC bunches, Work Lights the mean beam momentum decreased by about 5% while the rms momentum spread increased from 2% to 8%.The experimental results are compared with simulations made with the code TraFiC4.