Review of Fast Beam Chopping

Several types of fast beam chopping systems in use or under construction are presented. Emphasis is given to their specific technologies and in particular their various fields of application. Important parameters are duty cycle, rise- and fall-time, ringing and overall bandwidth. Certain systems have very specific driver concepts, since the generation of multi-kW peak power with nanosecond transients, high repetition rate and very good pulse shape fidelity is not a trivial issue. The design of driver amplifier and actual chopper structure are not always mutually independent and thus some of the limiting aspects will be discussed.

[1]  M.A. Clarke-Gayther,et al.  Slow-wave electrode structures for the ESS 2.5 MeV fast chopper , 2003, Proceedings of the 2003 Particle Accelerator Conference.

[2]  S. Kurennoy,et al.  Meander-line current structure for SNS fast beam chopper , 1999, Proceedings of the 1999 Particle Accelerator Conference (Cat. No.99CH36366).

[3]  Maurizio Vretenar,et al.  DESIGN OF A CHOPPER LINE FOR THE CERN SPL , 2002 .

[4]  S. Kurennoy,et al.  Progress with SNS fast beam chopper , 2001, PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268).

[5]  J. F. Power,et al.  DEVELOPMENT OF MEANDER-LINE CURRENT STRUCTURE FOR SNS FAST 2.5-MEV BEAM CHOPPER , 2000 .

[6]  高エネルギー加速器研究機構,et al.  Accelerator technical design report for J-PARC , 2003 .

[7]  M. Paoluzzi,et al.  THE CERN-SPL CHOPPER CONCEPT AND FINAL LAYOUT , 2004 .

[8]  M. Ikegami,et al.  Beam study with RF choppers in the MEBT of the J-PARC proton linac , 2003, Proceedings of the 2003 Particle Accelerator Conference.

[9]  Y.Yamazaki.  Status of the J-PARC Linac, Initial Results and Upgrade Plan , 2004 .

[10]  Michael A. Clarke-Gayther,et al.  A FAST BEAM CHOPPER FOR NEXT GENERATION HIGH POWER PROTON DRIVERS , 2004 .

[11]  Weiren Chou.  Spallation Neutron Source and Other High Intensity Proton Sources , 2003 .

[12]  R. Hardekopf,et al.  Pulsed Beam Chopper for the PSR at LAMPF , 1983, IEEE Transactions on Nuclear Science.

[13]  M.A. Clarke-Gayther,et al.  Modulator systems for the ESS 2.5 MeV fast chopper , 2001, PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268).