| Paper |
Title |
Page |
| TUPCH061 |
Installation of Beam Monitor Sensors in the LINAC Section of J-PARC
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1151 |
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- S. Sato, H. Ao, T. Tomisawa, A. Ueno
JAEA/LINAC, Ibaraki-ken
- H. Akikawa
JAEA, Ibaraki-ken
- Z. Igarashi, S. Lee
KEK, Ibaraki
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In the LINAC section of J-PARC, we have several type of sensors of monitor, i.e, Beam Position Monitor, Beam Profile Monitor, Beam Size Monitor, Current Monitor, Beam Phase Monitor, Beam Loss Monitor. Those sensors are being installed currently. The procedures, remarks during the installation, status are described in this paper. As an examle, the beam postion monitors are one of sensors which are taken cared intensively for their positioning on their housing quadrupole magnet, then our cares during their installation are described .
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| TUPCH064 |
Beam-based Alignment Strategy for the Group Controlled Magnets System
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1160 |
| |
- N. Hayashi
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- S. Lee, T. Toyama
KEK, Ibaraki
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The beam based alignment of the beam position monitor (BPM) becomes an important tool to reduce the closed orbit distortion (COD) in the recent accelerator. Normally, it requires the independent control of the quadrupole field. Changing the current of a quadrupole magnet, one would find the unperturbed position. However, the J-PARC Rapid-Cycling Synchrotron (RCS) has seven quadrupole families and only group of each family can be controlled simultaneously. There is neither separate power supplies nor auxiliary coil windings on each individual magnet. A similar alignment procedure is applicable for the coupled-controlled magnet system, but it becomes very complicated. For the simplest case, three magnets grouped together, four different beam orbits have to be measured at three different BPM locations. The method and some simulation results for J-PARC/RCS case will be presented in this report.
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| TUPCH065 |
A Prototype of Residual Gas Ionization Profile Monitor for J-PARC RCS
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1163 |
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- K. Satou, N. Hayashi
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken
- S. Lee, T. Toyama
KEK, Ibaraki
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A prototype of a residual gas ionization profile monitor (IPM) for J-PARC RCS has been developed. It consists of electrodes producing electric field to collect ionized ions/electrons, MCP as a signal read-out device, an electron generator to evaluate the gain balance of MCP channels, and a wiggler type magnet producing guiding field. The monitor has been installed in KEK-PS main ring and has been examined using proton beam. At the conference, recent preliminary results of experiments will be reported.
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