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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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Crab Cavities for ILC
/ McIntosh, Peter (Daresbury ; Cockcroft Inst. Accel. Sci. Tech.) ; Belomestnykh, Sergey (Fermilab) ; Burt, Graeme (Lancaster U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Calaga, Rama (CERN) ; De Silva, Subashini (Jefferson Lab ; Old Dominion U. (main)) ; Delayen, Jean (Old Dominion U. ; Jefferson Lab) ; Gonin, Ivan (Fermilab) ; Khabiboulline, Timergali (Fermilab) ; Lunin, Andrei (Fermilab) ; Okugi, Toshiyuki (KEK, Tsukuba) et al.
For the 14 mrad crossing angle proposed, crab cavity systems are fundamentally anticipated for the viable operation of the International Linear Collider (ILC), in order to maximise its luminosity performance. Since 2021, a specialist development team have been defining optimum crab cavity technologies which can fulfil the operational requirements for ILC, both for its baseline centre-of-mass energy of 250 GeV, but also extending those requirements out to higher beam collision intensities. [...]
FERMILAB-CONF-23-0863-SQMS-TD.-
2023 - 9 p.
- Published in : JACoW SRF 2023 (2023) 990-998
Fermilab Library Server: PDF; Fulltext: PDF; External link: Fermilab Library Server
In : 21st International Conference on Radio-Frequency Superconductivity (SRF 2023), Grand Rapids, MI, United States, 22 - 30 Jun 2023, pp.990-998
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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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5.
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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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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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Intensity dependent effects at ATF2, KEK
/ Korysko, Pierre (CERN ; U. Oxford (main)) ; Burrows, Philip (U. Oxford (main)) ; Faus-Golfe, Angeles (Orsay, LAL) ; Kubo, Kiyoshi (KEK, Tsukuba) ; Latina, Andrea (CERN) ; Okugi, Toshiyuki (KEK, Tsukuba)
The Accelerator Test Facility 2 (ATF2) at KEK is a prototype for the Final Focus Systems of the future e+e- linear colliders, the International Linear Collider (ILC) and the Compact Linear Collider (CLIC). In this paper both simulation and experimental results are presented with special emphasis on intensity-dependent effects. [...]
CERN-ACC-2019-149.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPGW086
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPGW086
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Improving the Performance of an Orbit Feed-forward Based on Quadrupole Motion at the KEK ATF
/ Bett, Douglas (CERN) ; Burrows, Philip (JAI, Oxford) ; Charrondière, Cedric (CERN) ; Christian, Glenn (JAI, Oxford) ; Jeremie, Andrea (Annecy, LAPP) ; Kubo, Kiyoshi (KEK, Tsukuba) ; Kuroda, Shigeru (KEK, Tsukuba) ; Naito, Takashi (KEK, Tsukuba) ; Okugi, Toshiyuki (KEK, Tsukuba) ; Patecki, Marcin (CERN) et al.
The high luminosity requirement for a future linear collider sets a demanding limit on the beam quality at the Interation Point (IP). Even the natural motion of the ground could misalign the quadrupole magnets to such an extent that the resulting dipole kicks would require compensation. [...]
CERN-ACC-2017-249.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPIK097
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPIK097
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Progress in Ultra-Low β* Study at ATF2
/ Patecki, Marcin (CERN) ; Bett, Douglas (CERN) ; Kubo, Kiyoshi (KEK, Tsukuba ; Sokendai, Tsukuba) ; Kuroda, Shigeru (KEK, Tsukuba ; Sokendai, Tsukuba) ; Naito, Takashi (KEK, Tsukuba ; Sokendai, Tsukuba) ; Okugi, Toshiyuki (KEK, Tsukuba ; Sokendai, Tsukuba) ; Plassard, Fabien (CERN) ; Tauchi, Toshiaki (KEK, Tsukuba ; Sokendai, Tsukuba) ; Terunuma, Nobuhiro (KEK, Tsukuba ; Sokendai, Tsukuba) ; Tomás, Rogelio (CERN)
A nanometer beam size in the interaction point (IP) is required in case of future linear colliders for achieving the desired rate of particle collisions. KEK Accelerator Test Facility (ATF2), a scaled down implementation of the beam delivery system (BDS), serves for investigating the limits of electron beam focusing at the interaction point. [...]
CERN-ACC-2016-186.-
2016 - 4 p.
- Published in : 10.18429/JACoW-IPAC2016-THPMB043
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPMB043
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