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1.
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Improvement of the longitudinal phase space tomography at the J-PARC synchrotrons
/ Okita, H (J-PARC) ; Tamura, F (J-PARC) ; Yamamoto, M (J-PARC) ; Nomura, M (J-PARC) ; Shimada, T (J-PARC) ; Saha, P K (J-PARC) ; Yoshii, M (J-PARC) ; Ohmori, C (J-PARC) ; Sugiyama, Y (J-PARC) ; Hasegawa, K (J-PARC) et al.
The longitudinal phase space tomography, which reconstructs the phase space distribution from the one-dimensional bunch profiles, is used in various accelerators to measure longitudinal beam parameters. At the J-PARC, an implementation of the phase space tomography based on the convolution back projection method has been used to measure the momentum spread of the injected beam. [...]
2024 - 7 p.
- Published in : J. Phys. : Conf. Ser.: 2687 (2024) , no. 7, pp. 072005
- Published in : JACoW IPAC: 2023 (2023) , pp. THPL105
Fulltext: PublicationJACoW - PDF; PublicationIOP - PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.072005
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2.
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Design Studies on a High-Power Wide-Band RF Combiner for Consolidation of the Driver Amplifier of the J-PARC RCS
/ Okita, Hidefumi (KEK, Tsukuba ; J-PARC) ; Hara, Keigo (KEK, Tsukuba ; J-PARC) ; Hasegawa, Katsushi (KEK, Tsukuba ; J-PARC) ; Nomura, Masahiro (KEK, Tsukuba ; J-PARC) ; Ohmori, Chihiro (KEK, Tsukuba ; J-PARC) ; Paoluzzi, Mauro (CERN) ; Shimada, Taihei (KEK, Tsukuba ; J-PARC) ; Sugiyama, Yasuyuki (KEK, Tsukuba ; J-PARC) ; Tamura, Fumihiko (KEK, Tsukuba ; J-PARC) ; Yamamoto, Masanobu (KEK, Tsukuba ; J-PARC) et al.
A power upgrade of the existing 8 kW solid-state driver amplifier is required for the acceleration of high intensity proton beams in the J-PARC 3 GeV rapid cycling synchrotron (RCS). The development of a 25 kW amplifier with gallium nitride (GaN) HEMTs and based on 6.4 kW modules is ongoing. [...]
2022 - 3 p.
- Published in : JACoW IPAC 2022 (2022) 1333-1335
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1333-1335
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3.
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4.
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Measurement of coherent $\pi^{+}$ production in low energy neutrino-Carbon scattering
/ T2K Collaboration
We report the first measurement of the flux-averaged cross section for charged current coherent $\pi^{+}$ production on carbon for neutrino energies less than 1.5 GeV to a restricted final state phase space region in the T2K near detector, ND280. Comparisons are made with predictions from the Rein-Sehgal coherent production model and the model by Alvarez-Ruso {\it et al.}, the latter representing the first implementation of an instance of the new class of microscopic coherent models in a neutrino interaction Monte Carlo event generator. [...]
arXiv:1604.04406.-
2016-11-04 - 7 p.
- Published in : Phys. Rev. Lett. 117 (2016) 192501
APS Open Access article: PDF; Fulltext: PDF; External link: Preprint
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5.
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The First Beam Recirculation and Beam Tuning in the Compact ERL at KEK
/ Sakanaka, Shogo ; Adachi, Masahiro ; Adachi, Shin-ichi ; Akemoto, Mitsuo ; Arakawa, Dai ; Asaoka, Seiji ; Enami, Kazuhiro ; Endo, Kuninori ; Fukuda, Shigeki ; Furuya, Takaaki et al.
Superconducting(SC)-linac-based light sources, which can produce ultra-brilliant photon beams in CW operation, are attracting worldwide attention. In KEK, we have been conducting R&D; efforts towards the energy-recovery-linac(ERL)-based light source* since 2006. [...]
CERN-ACC-2014-380.-
2014 - 4 p.
- Published in : (2014) , pp. TUPP075
Fulltext: tupp075 - PDF; tupp075_2 - PDF; External link: JACoW server
In : 27th Linear Accelerator Conference, Geneva, Switzerland, 31 Aug - 5 Sep 2014, pp.TUPP075
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6.
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The Status of the J-PARC RF Systems
/ Yoshii, M (KEK, Tsukuba) ; Anami, S (KEK, Tsukuba) ; Ezura, E (KEK, Tsukuba) ; Haga, K (JAEA, Ibaraki) ; Hara, K (KEK, Tsukuba) ; Hasegawa, K (JAEA, Ibaraki) ; Nomura, M (JAEA, Ibaraki) ; Ohmori, C (KEK, Tsukuba) ; Schnase, A (JAEA, Ibaraki) ; Takagi, A (KEK, Tsukuba) et al.
2008 - 3 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.MOPC134
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7.
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J-PARC RCS Non-linear Frequency Sweep Analysis
/ Schnase, A (JAEA, Ibaraki) ; Anami, S (KEK, Tsukuba) ; Ezura, E (KEK, Tsukuba) ; Haga, K (JAEA, Ibaraki) ; Hara, K (KEK, Tsukuba) ; Hasegawa, K (JAEA, Ibaraki) ; Nomura, M (JAEA, Ibaraki) ; Ohmori, C (KEK, Tsukuba) ; Takagi, A (KEK, Tsukuba) ; Tamura, F (JAEA, Ibaraki) et al.
2008 - 3 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.MOPC120
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8.
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Beam Acceleration with Full-digital LLRF Control System in the J-PARC RCS
/ Tamura, F (JAEA, Ibaraki) ; Anami, S (KEK, Tsukuba) ; Ezura, E (KEK, Tsukuba) ; Haga, K (JAEA, Ibaraki) ; Hara, K (KEK, Tsukuba) ; Hasegawa, K (JAEA, Ibaraki) ; Nomura, M (JAEA, Ibaraki) ; Ohmori, C (KEK, Tsukuba) ; Schnase, A (JAEA, Ibaraki) ; Takagi, A (KEK, Tsukuba) et al.
2008 - 3 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.MOPC126
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9.
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Acceleration Voltage Pattern for J-PARC RCS
/ Yamamoto, M (JAEA, Ibaraki) ; Anami, S (KEK, Tsukuba) ; Ezura, E (KEK, Tsukuba) ; Hara, K (KEK, Tsukuba) ; Hasegawa, K (JAEA, Ibaraki) ; Nomura, M (JAEA, Ibaraki) ; Ohmori, C (KEK, Tsukuba) ; Schnase, A (JAEA, Ibaraki) ; Takagi, A (KEK, Tsukuba) ; Tamura, F (JAEA, Ibaraki) et al.
2008 - 3 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.MOPC132
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10.
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Possible Upgrade Scenario for J-PARC Ring RF
/ Ohmori, C (KEK, Tsukuba) ; Hara, K (KEK, Tsukuba) ; Hasegawa, K (JAEA, Ibaraki) ; Nomura, M (JAEA, Ibaraki) ; Schnase, A (JAEA, Ibaraki) ; Takagi, A (KEK, Tsukuba) ; Tamura, F (JAEA, Ibaraki) ; Toda, M (KEK, Tsukuba) ; Yamamoto, M (JAEA, Ibaraki) ; Yoshii, M (KEK, Tsukuba)
2008 - 3 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.MOPP104
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