Title :
Tools to predict beam breakup in recirculating linacs
Author :
Beard, K. ; Merminga, L. ; Yunn, B.
Author_Institution :
Thomas Jefferson Nat. Accelerator Facility, Newport News, VA, USA
Abstract :
An important limitation on the maximum beam current in a recirculating linac is due to beam breakup caused by higher order modes (HOM) excited in the RF cavities. A HOM delivers a transverse kick to a beam bunch, the bunch on the next pass can then drive the HOM and cause it to grow until the beam is lost. Two codes, MATBBU and TDBBU, have been written to estimate the threshold current for a set of HOMs and accelerator optics. The relative merits and limitations of each is discussed in detail.
Keywords :
linear colliders; particle beam diagnostics; particle beam stability; MATBBU; RF cavities; TDBBU; beam breakup; higher order modes; maximum beam current; recirculating linacs; Acceleration; Eigenvalues and eigenfunctions; Electrons; Impedance; Linear accelerators; Particle beams; Q factor; Radio frequency; Threshold current; US Department of Energy;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1288915
