Title :
RMS emittance measurements using optical transition radiation interferometry at the Jefferson Lab FEL
Author :
Holloway, M.A. ; Fiorito, R.B. ; O´Shea, P.G. ; Shkvarunets, A.G. ; Benson, S.V. ; Brock, W. ; Coleman, J.L. ; Douglas, D. ; Evans, R. ; Evtushenko, P. ; Jordan, K. ; Sexton, D.
Author_Institution :
Univ. of Maryland, College Park
Abstract :
Optical transition radiation interferometry (OTRI) has proven to be effective tool for measuring rms beam divergence. We present rms emittance measurement results of the 115 MeV energy recovery linac at the Thomas Jefferson National Laboratory´s Free Electron Laser using OTRI. OTR data from both near field beam images and far field angular distribution images give evidence of two spatial and angular distributions within the beam. Using the unique features of OTRI we segregate the two distributions of the beam and estimate separate rms emittance values for each component.
Keywords :
linear accelerators; particle beam diagnostics; transition radiation detectors; far field angular distribution images; linac; near field beam images; optical transition radiation interferometry; rms emittance measurements; Electron emission; Electron optics; Energy measurement; Free electron lasers; Laboratories; Laser beams; Laser transitions; Linear particle accelerator; Optical interferometry; Stimulated emission;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440366
