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1.
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Updated Model of the Resistive Wall Impedance for the Main Ring of J-PARC
/ Yee-Rendón, Bruce (KEK, Tsukuba) ; Chin, Yong Ho (KEK, Tsukuba) ; Kuboki, Hironori (KEK, Tsukuba) ; Schenk, Michael (CERN) ; Toyama, Takeshi (KEK, Tsukuba)
The resistive wall impedance is one of the major contributors of the impedance in the Main Ring of J-PARC. The present model assumes round chambers of stainless steel with perfect magnet boundary conditions for its surroundings. [...]
2018 - 3 p.
- Published in : (2018) , pp. THPAK002
- Published in : J. Phys.: Conf. Ser. 1067 (2018) 062009
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAK002
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2.
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Twiss Parameter Measurement and Application to Space Charge Dynamics
/ Ohmi, Kazuhito (KEK, Tsukuba) ; Harada, Hiroyuki (JAEA, Ibaraki) ; Hatakeyama, Shuichiro (JAEA, Ibaraki) ; Igarashi, Susumu (KEK, Tsukuba) ; Kuroo, Nami (Unlisted, JP) ; Sato, Yoichi (JAEA, Ibaraki) ; Tomás, Rogelio (CERN) ; Toyama, Takeshi (JAEA, Ibaraki) ; Wegscheider, Andreas (CERN)
We are looking for feasible and quantitative method to evaluate space charge induced beam loss in J-PARC MR. One possible way is space charge simulation and theory based on measured Twiss parameter. [...]
CERN-ACC-2017-245.-
2017 - 3 p.
- Published in : 10.18429/JACoW-IPAC2017-WEPIK074
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEPIK074
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3.
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SIMPSONS with Wake Field Effects
/ Shobuda, Yoshihiro (JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken) ; Chin, Yong Ho (KEK, Ibaraki) ; Machida, Shinji (STFC/RAL/ASTeC, Chilton, Didcot, Oxon) ; Noda, Fumiaki (JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken) ; Takata, Koji (KEK, Ibaraki) ; Toyama, Takeshi (KEK, Ibaraki)
2006 - 3 p.
External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2910
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4.
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A Prototype of Residual Gas Ionization Profile Monitor for J-PARC RCS
/ Satou, Kenichirou (JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken) ; Hayashi, Naoki (JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken) ; Lee, Seishu (KEK, Ibaraki) ; Toyama, Takeshi (KEK, Ibaraki)
2006 - 3 p.
External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1163
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5.
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Beam-based Alignment Strategy for the Group Controlled Magnets System
/ Hayashi, Naoki (JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken) ; Lee, Seishu (KEK, Ibaraki) ; Toyama, Takeshi (KEK, Ibaraki)
2006 - 3 p.
External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.1160
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6.
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Induction System for a Proton Bunch Acceleration in Synchrotron
/ Torikai, Kota ; Arakida, Yoshio ; Kishiro, Junichi ; Kono, Tadaaki ; Nakamura, Eiji ; Shimosaki, Yoshito ; Takayama, Ken ; Toyama, Takeshi ; Wake, Masayoshi
Tsukuba : KEK, 2005 - 2 p.
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1398
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7.
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Induction Acceleration of a Single RF Bunch in the KEK PS
/ Takayama, Ken ; Arakawa, Dai ; Arakida, Yoshio ; Horioka, Kazuhiko ; Igarashi, Susumu ; Iwashita, Taiki ; Kawasaki, Atsushi ; Kishiro, Junichi ; Kono, Tadaaki ; Koseki, Kunio et al.
A single bunch trapped in an RF bucket was accelerated by induction devices from 500 MeV to 8GeV beyond transition energy in the KEK-PS. This is the first demonstration of induction acceleration in a high energy circular ring. [...]
2005
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1679
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8.
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Developments of the Calibration Tools for Beam Position Monitor at J-PARC Linac
/ Sato, Susumu ; Akikawa, Hisashi ; Igarashi, Zenei ; Ikegami, Masanori ; Kamikubota, Norihiko ; Lee, Seishu ; Tomisawa, Tetsuo ; Toyama, Takeshi ; Ueno, Akira
In the J-PARC LINAC, there are mainly two requirements for the beam based calibration of beam position monitors (BPMs). One is that BPMs need to be calibrated with the accuracy of about a hundred micro-meters to minimize beam loss for the world highest class of proton intensity. [...]
2005
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2777
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9.
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Beam Diagnostics for the J-PARC Main Ring Synchrotron
/ Toyama, Takeshi ; Arakawa, Dai ; Hashimoto, Yoshinori ; Hayashi, Naoki ; Kishiro, Junichi ; Lee, Seishu ; Miura, Takako ; Muto, Suguru ; Toyokawa, Ryoji
Beam diagnostics: beam intensity monitors (DCCT, SCT, FCT, WCM), beam position monitors (ESM), beam loss monitors (proportional chamber, air ion chamber), beam profile monitors (secondary electron emission, gas-sheet) have been designed, tested, and will be installed for the Main Ring synchrotron of J-PARC (Japan Proton Accelerator Research Complex). This paper describes the basic design principle and specification of each monitor, with a stress on how to cope with high power beam (average circulation current of ~12 A) and low beam loss operation (less than 1 W/m except a collimator region). [...]
2005
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.958
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