| DATE: |
2006-05-25 13:30 - 15:30 |
| PLACE: |
Building No.2, 2F, Rm.203 |
| TITLE: |
Accelerator Physics Seminar [ Space charge and intrinsic field non-linearities in Main Ring of J-PARC: particle losses during the injection process ] |
| CONTACT: |
ohmi post.kek.jp |
| SPEAKER: |
Alexander Molodozhentsev (ACCL / KEK) |
| LANGUAGE: |
English |
| ABSTRACT: |
Main Ring of the J-PARC complex at the final stage should provide the beam power about 800 kW. Total particle losses in the machine during the injection process at the scraper position should be less than 450W. For Main Ring of J-PARC the space charge effect in combination with the intrinsic field nonlinearities (first of all the sextupole nonlinearity, used for the linear chromaticity correction) could lead to significant particle losses. We study these effects by using the ORBIT-MPI code (SNS). In frame of this report we will discuss possible mechanisms of the particle losses in Main Ring during the injection process for the realistic machine parameters. Estimation of the particle losses for different stages of the commissioning scenario will be presented. |
