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Title |
Page |
| TUP020 |
The J-PARC L3BT Monitor System for RCS Injection
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290 |
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- S. Lee, Z. Igarashi, M. Ikegami, T. Toyama
KEK, Ibaraki
- H. Akikawa, T. Ohkawa
JAEA, Ibaraki-ken
- N. Hayashi, S. H. Hiroki
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- S. Sato, T. Tomisawa, A. Ueno
JAEA/LINAC, Ibaraki-ken
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The J-PARC linac-3GeV rapid cycling synchrotron (RCS) beam transport line (L3BT) monitor system will be used to tune the intensity of 5mA-50mA linac beam. The monitor system is composed of BPMs and multi wire profile scanners (MWPS) in L3BT line and RCS injection area. A non-destructive beam momentum spread monitor using a 4-stripline pickups is also developed in order to measure and control the momentum spread of linac beams. The spatial resolution of less than 0.3mm and momentum spread of less than 0.1% is required for RCS injection to avoid uncontrolled beam losses. In this paper, beam position monitor, profile monitor and momentum spread measurement for J-PARC linac is described. Preliminary results of beam size and m value measurement with quadrupole mode of the signal of 4-stripline BPMs in the KEK MEBT1 are also discussed.
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| TUP067 |
Tune-up Scenario for Debuncher System in J-PARC L3BT
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406 |
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- M. Ikegami, H. Akikawa, Z. Igarashi, S. Lee
KEK, Ibaraki
- Y. Kondo
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- T. Morishita, S. Sato, T. Tomisawa, A. Ueno
JAEA/LINAC, Ibaraki-ken
- T. Ohkawa
JAEA, Ibaraki-ken
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We plan to start beam commissioning of J-PARC linac and the succeeding beam transport line in December 2006. The beam transport line, to which we refer as L3BT, has two key functionalities to satisfy the requirements for the succeeding ring injection. One is to reduce the momentum jitter and momentum spread, and the other is to scrape off the transverse tail. To realize the former functionality, a debuncher system is installed in L3BT which enables longitudinal gymnastics of the beam to reduce the momentum spread at the ring injection. In this presentation, the tune-up scenario for the debuncher system is presented together with simulation results on the effects of debuncher system.
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| TUP068 |
Tuning Strategy for Transverse Collimator in J-PARC L3BT
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409 |
| |
- M. Ikegami, H. Akikawa, S. Lee
KEK, Ibaraki
- H. Ao, T. Morishita, S. Sato, A. Ueno
JAEA/LINAC, Ibaraki-ken
- Y. Kondo
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- T. Ohkawa
JAEA, Ibaraki-ken
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We plan to start beam commissioning of J-PARC linac and the succeeding beam transport line in December 2006. The beam transport line, to which we refer as L3BT, has two key functionalities to satisfy the requirements for the succeeding ring injection. One is to reduce the momentum jitter and momentum spread, and the other is to scrape off the transverse tail. To realize the latter functionality, a transverse collimator system is installed in L3BT which consists of four horizontal and four vertical collimators. In this presentation, the tuning strategy for the transverse collimator system is presented together with the main features of the collimator system.
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