Title :
High average current effects in energy recovery linacs
Author :
Merminga, L. ; Campisi, I.E. ; Douglas, D.R. ; Krafft, G.A. ; Preble, J. ; Yunn, B.C.
Author_Institution :
Jefferson Lab., Newport News, VA, USA
Abstract :
Energy recovery linacs (ERLs) can be used as high efficiency driver accelerators to free electron lasers, synchrotron radiation light sources and colliders. Energy recovery has been successfully demonstrated up to 5 mA of average current in the Jefferson Lab 1.7 kW IR FEL. Future designs call for much higher average currents of order 100 mA. A number of phenomena can potentially limit the performance of ERLs at these high currents. We review multibunch, multipass instabilities and present experimental data on transverse beam breakup and HOM power dissipation obtained at the Jefferson Lab IR FEL. We compare measurements with analytical calculations and simulations
Keywords :
accelerator cavities; linear accelerators; particle beam bunching; particle beam stability; HOM power dissipation; IR FEL; Jefferson Lab; energy recovery linacs; multibunch multipass instabilities; single cavity model; transverse beam breakup; Analytical models; Electron accelerators; Feedback loop; Free electron lasers; Light sources; Linear accelerators; Optical beams; Power dissipation; Synchrotron radiation; Threshold current;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987462
