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1.
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Development of the Directly-Sliced Niobium Material for High Performance SRF Cavities
/ Kumar, Ashish (KEK, Tsukuba) ; Araki, Hayato (KEK, Tsukuba) ; Dohmae, Takeshi (KEK, Tsukuba) ; Ito, Hayato (KEK, Tsukuba) ; Saeki, Takayuki (KEK, Tsukuba) ; Umemori, Kensei (KEK, Tsukuba) ; Yamamoto, Akira (KEK, Tsukuba ; CERN ; JAI, UK ; Oxford U.) ; Yamanaka, Masashi (KEK, Tsukuba)
For the purpose of cost reduction for the ILC, KEK has been conducting R&D; on direct sliced Nb materials such as large grain and medium grain Nb. Single-cell, 3-cell, and 9-cell cavities have been manufactured, and each has demonstrated a high-performance accelerating gradient exceeding 35 MV/m. [...]
2023 - 7 p.
- Published in : JACoW SRF 2023 (2023) 634-640
Fulltext: PDF;
In : 21st International Conference on Radio-Frequency Superconductivity (SRF 2023), Grand Rapids, MI, United States, 22 - 30 Jun 2023, pp.634-640
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2.
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3.
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Key directions for research and development of superconducting radio frequency cavities
/ Belomestnykh, S. (Fermilab ; Stony Brook U.) ; Posen, S. (Fermilab) ; Bafia, D. (Fermilab) ; Balachandran, S. (Natl. High Mag. Field Lab.) ; Bertucci, M. (LASA, Segrate) ; Burrill, A. (SLAC) ; Cano, A. (Fermilab) ; Checchin, M. (Fermilab) ; Ciovati, G. (Jefferson Lab) ; Cooley, L.D. (Natl. High Mag. Field Lab.) et al.
Radio frequency superconductivity is a cornerstone technology for many future HEP particle accelerators and experiments from colliders to proton drivers for neutrino facilities to searches for dark matter. [...]
arXiv:2204.01178 ; FERMILAB-PUB-22-241-SQMS-TD.
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Fermilab Library Server - eConf - Fulltext - Fulltext
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4.
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Medium-Grain Niobium SRF Cavity Production Technology for Science Frontiers and Accelerator ApplicationsMedium grain niobium SRF cavity production technology for science frontiers and accelerator applications
/ Myneni, G. (Old Dominion U. ; Unlisted, US ; Old Dominion U. (main) ; Jefferson Lab) ; Hani E. Elsayed-Ali (Old Dominion U. ; Old Dominion U. (main)) ; Islam, Md Obidul (Old Dominion U. ; Old Dominion U. (main)) ; Sayeed, Md Nizam (Old Dominion U. ; Old Dominion U. (main)) ; Ciovati, G. (Jefferson Lab ; Old Dominion U.) ; Dhakal, P. (Jefferson Lab) ; Rimmer, R.A. (Jefferson Lab) ; Carl, M. (Unlisted, US) ; Fajardo, A. (Unlisted, US) ; Lannoy, N. (Unlisted, US) et al.
We propose cost-effective production of medium grain (MG) niobium (Nb) discs directly sliced from forged and annealed billet. This production method provides clean surface conditions and reliable mechanical characteristics with sub-millimeter average grain size resulting in stable SRF cavity production. [...]
arXiv:2203.07371.-
2023-04-21 - 14 p.
- Published in : JINST 18 (2023) T04005
Fulltext: PDF; External link: eConf
In : 2021 Snowmass Summer Study, Seattle, WA, United States, 11 - 20 July 2021, pp.T04005
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5.
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Proposal for the ILC Preparatory Laboratory (Pre-lab)
/ International Linear Collider International Development Team Collaboration
During the preparatory phase of the International Linear Collider (ILC) project, all technical development and engineering design needed for the start of ILC construction must be completed, in parallel with intergovernmental discussion of governance and sharing of responsibilities and cost. [...]
arXiv:2106.00602.
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48 p.
Fulltext
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6.
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Optimization of an hybrid positron source using channeling
/ Chaikovska, I (Orsay, LAL) ; Chehab, R (Orsay, LAL) ; Guler, H (Orsay, LAL) ; Sievers, P (CERN) ; Artru, X (Lyon, IPN) ; Chevallier, M (Lyon, IPN) ; Suwada, T (KEK, Tsukuba) ; Satoh, M (KEK, Tsukuba) ; Kamitani, T (KEK, Tsukuba) ; Furukawa, K (KEK, Tsukuba) et al.
The hybrid positron source made of a crystal-radiator, as a source of channeling radiation, and an amorphous converter is briefly described. Optimization of the heating effects and thermal shocks led to a granular converter made of small tungsten spheres. [...]
2017 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 402 (2017) 58-62
In : 7h International Conference on Charged & Neutral Particles Channeling Phenomena, Sirmione, Italy, 23 - 30 Sep 2016, pp.88
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7.
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Investigations on a hybrid positron source with a granular converter
/ Artru, X (Lyon, IPN) ; Chaikovska, I (Orsay, LAL) ; Chehab, R (Lyon, IPN) ; Chevallier, M (Lyon, IPN) ; Dadoun, O (Orsay, LAL) ; Furukawa, K (KEK, Tsukuba) ; Guler, H (Orsay, LAL) ; Kamitani, T (KEK, Tsukuba) ; Miyahara, F (KEK, Tsukuba) ; Satoh, M (KEK, Tsukuba) et al.
Promising results obtained with crystal targets for positron production led to the elaboration of a hybrid source made of an axially oriented tungsten crystal, as a radiator, and an amorphous tungsten converter. If the converter is granular, made of small spheres, the heat dissipation is greatly enhanced and the thermal shocks reduced, allowing the consideration of such device for the future linear colliders. [...]
2015 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 355 (2015) 60-64
Elsevier Open Access article: PDF;
In : 6th International Conference on Charged and Neutral Particles Channeling Phenomena, Capri, Italy, 5 - 10 Oct 2014, pp.60-64
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8.
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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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9.
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Results of Vertical Tests for the KEK-ERL Single Cell Superconducting Cavities
/ Umemori, K (KEK, Tsukuba) ; Furuya, T (KEK, Tsukuba) ; Sakai, H (Tokyo U., ISSP) ; Sawamura, M (JAEA, Ibaraki) ; Shinoe, K (Tokyo U., ISSP) ; Takahashi, T (KEK, Tsukuba)
2008 - 3 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.MOPP159
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10.
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Present Status of PF-ring and PF-AR in KEK
/ Kobayashi, Y (KEK, Tsukuba) ; Asaoka, S (KEK, Tsukuba) ; Ebihara, K (KEK, Tsukuba) ; Haga, K (KEK, Tsukuba) ; Harada, K (KEK, Tsukuba) ; Honda, T (KEK, Tsukuba) ; Ieiri, T (KEK, Tsukuba) ; Izawa, M (KEK, Tsukuba) ; Kageyama, T (KEK, Tsukuba) ; Kasuga, T (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.WEPC035
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