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CERN Document Server Sök i 135 journaler efter:  1 - 10nästaslut  gå till journal: Sökningen tog 1.45 sekunder. 
1.
Magnetic Alloy Loaded Cavities in J-PARC and CERN / Ohmori, Chihiro (J-PARC) ; Paoluzzi, Mauro (CERN)
Magnetic Alloy loaded cavities have been used in seven synchrotrons in J-PARC and CERN. In this paper, we will review variety of the cavity technologies to satisfy the requirements for the beam acceleration, deceleration, manipulation and instability damping. [...]
2024 - 5 p. - Published in : JACoW HB 2023 (2024) WEC4C1 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.WEC4C1
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2.
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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3.
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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4.
20-Year Collaboration on Synchrotron RF Between CERN and J-PARC / Ohmori, Chihiro (J-PARC) ; Brucoli, Matteo (CERN) ; Brugger, Markus (CERN) ; Damerau, Heiko (CERN) ; Danzeca, Salvatore (CERN) ; Hasegawa, Katsushi (J-PARC) ; Morita, Yuichi (J-PARC) ; Okita, Hidefumi (J-PARC) ; Paoluzzi, Mauro (CERN) ; Rossi, Carlo (CERN) et al.
in 2002, KEK/J-PARC and CERN started the collaboration on the RF systems of Low Energy Ion Ring to use magnetic alloy loaded cavities in 2002 for heavy ion collision program at LHC. It was an exchange of our expertise on the wideband cavities and high-power solid-state amplifiers. [...]
2022 - 4 p. - Published in : JACoW IPAC 2022 (2022) 3130 Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.3130
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5.
J-PARC Contributions to the LHC Injector Upgrade (LIU) Project / Ohmori, Chihiro (J-PARC) ; Paoluzzi, Mauro (CERN) ; Tamura, Fumihiko (J-PARC ; JAEA, Ibaraki) ; Hasegawa, Katsushi (J-PARC) ; Sugiyama, Yasuyuki (J-PARC) ; Shirakata, Masashi (J-PARC) ; Yoshii, Masahito (J-PARC)
The LHC Injector Upgrade (LIU) was launched in 2010 in synergy with the High Luminosity LHC (HL-LHC) project.^2) It includes the consolidation/upgrade of the PS Booster RF systems:^3,4) all the existing ferrite-loaded RF cavities are being replaced with wideband RF systems during the 2019–2020 long shut down. The magnetic-annealed cores improve the cavity performance and reduce the number of the straight sections for RF systems. [...]
2021 - 6 p. - Published in : JPS Conf. Proc. 33 (2021) 011006-1-011006-6 Fulltext: PDF;
In : J-PARC Symposium 2019, Tsukuba, Japan, 23 - 26 Sep 2019, pp.011006-1-011006-6
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6.
Development of Radiation-Hard Solid-State Amplifiers for Kilogray Environments Using COTS Components / Ohmori, Chihiro (J-PARC) ; Paoluzzi, Mauro (CERN)
The high-luminosity Large Hadron Collider (LHC) (HL-LHC) project is the upgrade of the LHC to increase its luminosity by a factor of 5 compared with the nominal value. The LHC injector upgrade (LIU) project aims at upgrading the LHC injector chain to reach the goal of the HL-LHC. [...]
2019 - 8 p. - Published in : IEEE Trans. Nucl. Sci. 66 (2019) 2188-2195 Fulltext: PDF;
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7.
The new 1-18 MHz wideband RF system for the CERN PS Booster / Paoluzzi, Mauro (CERN) ; Arnaudon, Luca (CERN) ; Bretin, Vladimir (CERN) ; Cuvet, Yves (CERN) ; Daricou, Joel (CERN) ; Energico, Salvatore (CERN) ; Haase, Matthias (CERN) ; Jones, Anthony (CERN) ; Landré, David (CERN) ; Ohmori, Chihiro (J-PARC) et al.
The LHC Injectors Upgrade (LIU) project at CERN prepares the injectors to meet the requirements of the High Luminosity LHC. For protons, it includes the new Linac4, PS Booster (PSB), PS and SPS. [...]
CERN-ACC-2019-120.- 2019 - 3 p. - Published in : 10.18429/JACoW-IPAC2019-WEPRB107 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPRB107
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8.
RF amplifier using VRF151G and BLF 574 power RF mosfets / Ohmori, Chihiro (KEK) ; Paoluzzi, Mauro (CERN)
Two identical setups, each bearing one RF Mosfet type (VRF151 and BLF574) have been used. [...]
2019.
Full text
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9.
Development of radiation-hard solid-state amplifiers for kilo-gray environments using COTS components / Ohmori, Chihiro (KEK) ; Paoluzzi, Mauro (CERN)
2019.
Full text
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10.
Radiation damage tests of semi-conductors / Ohmori, C (KEK) ; Paoluzzi, M (CERN)
2018 - 1 p. - Published in : QST Takasaki Annual Report 2017, pp. 33 Fulltext: PDF;
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