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ATF2-3 hardware upgrade and new experimental results to maximize luminosity potential of linear colliders
/ Faus-Golfe, Angeles (IJCLab, Orsay) ; Aryshev, Alexander (KEK, Tsukuba) ; Lyapin, Alexey (Oxford U.) ; Kruchinin, Konstantin (KEK, Tsukuba) ; Terunuma, Nobuhiro (KEK, Tsukuba) ; Fuster-Martinez, Nuria (Valencia U., IFIC) ; Burrows, Philip (Oxford U.) ; Mazzoni, Stefano (CERN) ; Okugi, Toshiyuki (KEK, Tsukuba)
/ATF2 Collaboration
The ATF2-3 beamline is the only facility in the world for testing the Final Focus Beamline of linear colliders and is essential for the ILC and the CLIC projects. A vertical electron beam size of 41 nm (within 10% of the target), a closed-loop intra-bunch feedback of latency 133 ns, and direct stabilization of the beam position at the Interaction Point to 41 nm (limited by IP BPM resolution) have all been achieved at ATF2. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC04
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC04
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Observations on tune and β functions at the ATF damping ring
/ Potier, J P ; Urakawa, J ; Terunuma, N ; Mimashi, T ; Kubo, K ; Korhonen, T ; Hayano, H ; Okugi, T ; Kashiwagi, S ; Zimmermann, F
CERN-PS-98-010; CLIC-Note-363.-
Geneva : CERN, 1998 - 4 p.
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4.
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Tunability Study of the Ultra-Low β* Optics at ATF2 with New Octupole Setup and Tuning Knobs
/ Pastushenko, Andrii (CERN ; IJCLab, Orsay) ; Faus-Golfe, Ángeles (IJCLab, Orsay) ; Kubo, Kiyoshi (KEK, Tsukuba) ; Kuroda, Shigeru (KEK, Tsukuba) ; Naito, Takashi (KEK, Tsukuba) ; Okugi, Toshiyuki (KEK, Tsukuba) ; Terunuma, Nobuhiro (KEK, Tsukuba) ; Tomás García, Rogelio (CERN) ; Yang, Renjun (KEK, Tsukuba)
The main goal of the Accelerator Test Facility 2 (ATF2) is to demonstrate the feasibility of future linear colliders’ final focus systems. The Ultra-low β^{*} optics of ATF2 is designed to have the same chromaticity level as CLIC. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 752-755
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.752-755
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A Sub-Micron Resolution, Bunch-by-Bunch Beam Trajectory Feedback System and Its Application to Reducing Wakefield Effects in Single-Pass Beamlines
/ Bett, Douglas R (Oxford U.) ; Burrows, Philip N (Oxford U.) ; Kubo, Kiyoshi (KEK, Tsukuba) ; Okugi, Toshiyuki (KEK, Tsukuba) ; Perry, Colin (Oxford U.) ; Ramjiawan, Rebecca (Oxford U.) ; Terunuma, Nobuhiro (KEK, Tsukuba)
A high-precision intra-bunch-train beam orbit feedback correction system has been developed and tested at the KEK Accelerator Test Facility, ATF2. The system uses the vertical position of the bunch measured at two beam position monitors to calculate a pair of kicks which are applied to the next bunch using two upstream kickers, thereby correcting both the vertical position and trajectory angle. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 1382-1385
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1382-1385
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6.
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Beam halo from Touschek scattering in the KEK Accelerator Test Facility
/ Yang, R. (KEK, Tsukuba ; Sokendai, Tsukuba) ; Aryshev, A. (KEK, Tsukuba ; Sokendai, Tsukuba) ; Bambade, P. (IJCLab, Orsay) ; Bergamaschi, M. (CERN) ; Kubo, K. (KEK, Tsukuba ; Sokendai, Tsukuba) ; Naito, T. (KEK, Tsukuba ; Sokendai, Tsukuba) ; Terunuma, N. (KEK, Tsukuba ; Sokendai, Tsukuba) ; Wallon, S. (IJCLab, Orsay) ; Zhang, J. (DESY)
Beam halo is one of the crucial issues limiting the machine performance and causing radioactivation in high-intensity accelerators. [...]
arXiv:2109.06503.
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6 p.
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7.
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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.
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Momentum bandwidth of the KEK Accelerator Test Facility 2
/ Yang, R (CERN) ; Pastushenko, A (CERN ; IJCLab, Orsay) ; Cilento, V (CERN ; IJCLab, Orsay) ; Kubo, K (KEK, Tsukuba ; Sokendai, Tsukuba) ; Naito, T (KEK, Tsukuba ; Sokendai, Tsukuba) ; Okugi, T (KEK, Tsukuba ; Sokendai, Tsukuba) ; Terunuma, N (KEK, Tsukuba ; Sokendai, Tsukuba) ; Tomás, R (CERN)
Momentum bandwidth is an important characteristic for final focus systems (FFS) of future high-energy colliders. A large momentum bandwidth is a notable feature of the novel local-chromaticity-correction FFS, being demonstrated at the KEK Accelerator Test Facility 2 (ATF2), owing to the locality of chromaticity correction. [...]
2021 - 11 p.
- Published in : Phys. Rev. Accel. Beams 24 (2021) 051001
Fulltext from Publisher: PDF;
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9.
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Cherenkov Diffraction Radiation as a tool for beam diagnostics
/ Lefèvre, Thibaut (CERN) ; Alves, Diogo (CERN) ; Apollonio, Marco (Diamond Light Source) ; Aryshev, Alexander (KEK, Tsukuba) ; Bergamaschi, Michele (CERN) ; Billing, Michael (Cornell U., CLASSE) ; Bleko, Vitol'd (Tomsk Polytechnic U.) ; Bobb, Lorraine (Diamond Light Source) ; Bordlemay Padilla, Yadira (Cornell U., CLASSE) ; Conway, Joseph (Cornell U., CLASSE) et al.
During the last three years, the emission of Cherenkov Diffraction Radiation (ChDR), appearing when a relativistic charged particle moves in the vicinity of a dielectric medium, has been investigated with the aim of providing non-invasive beam diagnostics. ChDR has very interesting properties, with a large number of photons emitted in a narrow and well-defined solid angle, providing excellent conditions for detection with very little background. [...]
2019 - 5 p.
- Published in : 10.18429/JACoW-IBIC2019-THAO01
Fulltext: PDF;
In : 8th International Beam Instrumentation Conference (IBIC 2019), Malmo, Sweden, 8 - 12 Sep 2019
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10.
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ATF report 2020
/ Aryshev, Alexander (KEK, High Energy Accelerator Research Organization (Japan)) ; Bambade, Philip (Université Paris-Saclay (FR)) ; Bett, Douglas Robert (University of Oxford (GB)) ; Brunetti, Laurent (Centre National de la Recherche Scientifique (FR)) ; Burrows, Philip Nicholas (University of Oxford (GB)) ; Cilento, Vera (Université Paris-Saclay (FR)) ; Faus-Golfe, Angeles (Université Paris-Saclay (FR)) ; Karataev, Pavel (University of London (GB)) ; Korysko, Pierre (University of Oxford (GB)) ; Kiyoshi, Kubo (KEK, High Energy Accelerator Research Organization (Japan)) et al.
The KEK accelerator test faciliry (ATF) conducts R&D on a beam for the Linear Collider. [...]
CERN-ACC-2020-0029.
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2020. - 77 p.
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