Title :
Design of dynamic collimator for J-PARC main ring
Author :
Tomizawa, M. ; Molodozhentsev, A. ; Shirakata, M.
Author_Institution :
KEK, Tsukuba
Abstract :
The J-PARC main ring has a beam collimator section downstream of the injection area. The allowed beam loss is about 450 W. The beam halo generated before acceleration can be scraped by a standard collimator scheme. However the beam halo can grow during the acceleration. Such a halo may cause a serious beam loss at the extraction. A collimation during acceleration (dynamic collimator) is useful to reduce the beam loss at the extraction. We propose the dynamic collimator scheme and show the performance expected from the simulations.
Keywords :
accelerator magnets; collimators; linear accelerators; particle beam dynamics; particle beam extraction; particle beam injection; synchrotrons; J-PARC main ring; beam halo; beam injection area; dynamic collimator; linac; power 450 W; quadrupole magnets; rapid cycle synchrotron; standard collimator; Acceleration; Apertures; Colliding beam accelerators; Collimators; Linear particle accelerator; Magnets; Particle beams; Radio frequency; Space charge; Synchrotrons;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440804
