| Paper |
Title |
Page |
| MOPAN028 |
Current Status of Virtual Accelerator at J-PARC 3 GeV Rapid Cycling Synchrotron
|
215 |
| |
- H. Harada, K. Shigaki
Hiroshima University, Higashi-Hiroshima
- K. Furukawa
KEK, Ibaraki
- H. Hotchi, Y. Irie, F. Noda, H. Sako, H. Suzuki
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- S. Machida
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
|
|
| |
We have developed the logical accelerator called "Virtual Accelerator" based on EPICS for 3 GeV Rapid Cycling Synchrotron (RCS) in J-PARC. The Virtual Accelerator has a mathematical model of the beam dynamics in order to simulate the behavior of the beam and enables the revolutionary commissioning and operation of an accelerator. Additionally, we have constructed the commissioning tool based on the Virtual Accelerator. We will present a current status of the Virtual Accelerator system and some commissioning tool.
|
|
| TUPAN061 |
Updated Simulation for the Nuclear Scattering Loss Estimation at the RCS Injection Area
|
1526 |
| |
- P. K. Saha, H. Hotchi, Y. Irie, F. Noda
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- S. Machida
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
|
|
| |
We have updated the simulation for the realistic beam loss estimation at the RCS (Rapid Cycling Synchrotron) injection area of J-PARC(Japan Proton Accelerator Research Complex). At the injection area, beam loss caused by the nuclear scattering together with the multiple coulomb scattering at the charge-exchange foil is the dominant one and is an important issue for designing mainly the foil thickness and other beam elements like, the falling time of bump magnets after the injection is finished and so on. The simulation tool GEANT for the scattering effect and the real injection process have been employed together in order to estimate the beam loss turn by turn including identification of loss points too.
|
|
| FRPMN046 |
Effects of Magnetic Field Tracking Errors on Beam Dynamics at J-PARC RCS
|
4078 |
| |
- H. Hotchi, F. Noda
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- S. Machida
STFC/RAL/ASTeC, Chilton, Didcot, Oxon
|
|
| |
The 3-GeV Rapid-Cycling Synchrotron (RCS) of J-PARC aims at providing a 1-MW proton beam at a repetition rate of 25 Hz for an injection energy of 400 MeV. In this paper, we discuss influences of field tracking errors between dipoles and quadrupoles and between different families of quadrupoles on beam dynamics in combination with effects of the space charge and intrinsic nonlinear fields for the J-PARC RCS.
|
|
| FRPMN047 |
Development of a Beam Induced Heat-Flow Monitor for the Beam Dump of the J-PARC RCS
|
4084 |
| |
- K. Satou, N. Hayashi, H. Hotchi, Y. Irie, M. Kinsho, M. Kuramochi, P. K. Saha, Y. Yamazaki
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- S. Lee
KEK, Ibaraki
|
|
| |
A beam induced heat-flow monitor (BIHM) will be installed in front of the beam dump of the RCS (Rapid Cycling Synchrotron) at J-PARC (Japan Particle Accelerator Research Complex), where a power limitation of the beam dump is 4 kW. The purposes of this monitor are to observe a beam current injected into the beam dump and to generate an alarm signal for the main control system of the RCS. At the BIHM the beams penetrate a carbon plate of 1.5 mm in thickness, where the plate is supported by four rods on the monitor chamber. The heat generated by the interactions between the beam and the carbon plate propagates to the outer edge of the plate, and then to the monitor chamber through the four rods. By measuring the temperature differences between upstream and downstream ends of each rod, the total heat flow can be measured. The beam current can be determined by the measured heat flow with the help of the calculated stopping power of a proton in a carbon material. The design of the BIHM and test results of a prototype will be described.
|
|