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1.
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High-resolution, low-latency, bunch-by-bunch feedback system for nanobeam stabilization
/ Bett, D.R. (JAI, UK ; CERN) ; Blaskovic Kraljevic, N. (JAI, UK ; Lund U., MAX-lab) ; Bromwich, T. (JAI, UK ; Edinburgh U.) ; Burrows, P.N. (JAI, UK) ; Christian, G.B. (JAI, UK ; Diamond Light Source) ; Perry, C. (JAI, UK) ; Ramjiawan, R. (JAI, UK ; CERN)
We report the design, operation and performance of a high-resolution, low-latency, bunch-by-bunch feedback system for nano-beam stabilisation. The system employs novel, ultra-low quality-factor cavity beam position monitors (BPMs), a two-stage analogue signal down-mixing system, and a digital signal processing and feedback board incorporating an FPGA. [...]
arXiv:2201.01531.-
2022-02-01 - 14 p.
- Published in : Phys. Rev. Accel. Beams 25 (2022) 022801
Fulltext: Publication - PDF; 2201.01531 - PDF;
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2.
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Signal Processing Architecture for the HL-LHC Interaction Region BPMs
/ Bett, Douglas R (Oxford U.) ; Boccardi, Andrea (CERN) ; Degl'Innocenti, Irene (CERN) ; Krupa, Michal (CERN)
In the HL-LHC era, the Interaction Regions around the ATLAS and CMS experiments will be equipped with 24 new Beam Position Monitors (BPM) measuring both counter-propagating beams in a common vacuum chamber. Numerical simulations proved that, despite using new high-directivity stripline BPMs, the required measurement accuracy cannot be guaranteed without bunch-by-bunch disentanglement of the signals induced by both beams. [...]
JACoW, 2021 - 4 p.
- Published in : JACoW IBIC 2021 (2021) 100-103
Fulltext: PDF;
In : 10th International Beam Instrumentation Conference (IBIC 2021), Online, Korea, 13 - 17 Sep 2021, pp.100-103
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3.
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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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4.
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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.
Full text
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5.
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Publication
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6.
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Compensation of orbit distortion due to quadrupole motion using feed-forward control at KEK ATF
/ Bett, D R (CERN) ; Charrondière, C (CERN) ; Patecki, M (CERN) ; Pfingstner, J (CERN) ; Schulte, D (CERN) ; Tomás, R (CERN) ; Jeremie, A (Annecy, LAPP) ; Kubo, K (KEK, Tsukuba ; Tsukuba, Graduate U. Adv. Studies) ; Kuroda, S (KEK, Tsukuba ; Tsukuba, Graduate U. Adv. Studies) ; Naito, T (KEK, Tsukuba ; Tsukuba, Graduate U. Adv. Studies) et al.
The high luminosity requirement for a future linear collider sets a demanding limit on the beam quality at the Interaction Point (IP). One potential source of luminosity loss is the motion of the ground itself. [...]
2018 - 9 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 895 (2018) 10-18
Fulltext: PDF;
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7.
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ebook
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8.
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Experimental Validation of a Novel Compact Focusing Scheme for Future Energy-Frontier Linear Lepton Colliders
/ White, G R (SLAC) ; Ainsworth, R (Oxford U., JAI) ; Akagi, T (Hiroshima U.) ; Alabau-Gonzalvo, J (CERN) ; Angal-Kalinin, D (Daresbury) ; Araki, S (KEK, Tsukuba) ; Aryshev, A (KEK, Tsukuba) ; Bai, S (Beijing, Inst. High Energy Phys.) ; Bambade, P (Orsay, LAL) ; Bett, D R (Oxford U., JAI) et al.
/ATF2
A novel scheme for the focusing of high-energy leptons in future linear colliders was proposed in 2001 [ P. Raimondi and A. [...]
2014 - 6 p.
- Published in : Phys. Rev. Lett. 112 (2014) 034802
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9.
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The FONT5 Bunch-by-Bunch Position and Angle Feedback System at ATF2
/ Apsimon, R J (Oxford U., JAI) ; Bett, D R (Oxford U., JAI) ; Burrows, P N (Oxford U., JAI) ; Christian, G B (Oxford U., JAI) ; Constance, B (Oxford U., JAI ; CERN) ; Davis, M R (Oxford U., JAI) ; Gerbershagen, A (Oxford U., JAI ; CERN) ; Perry, C (Oxford U., JAI) ; Resta-Lopez, J (Valencia U., IFIC)
The FONT5 upstream beam-based feedback system at ATF2 is designed to correct the position and angle jitter at the entrance to the ATF2 final-focus system, and also to demonstrate a prototype intra-train feedback system for the International Linear Collider interaction point. We discuss the hardware, from stripline BPMs to kickers, and RF and digital signal processing, as well as presenting results from the latest beam tests at ATF2..
2012 - 9 p.
- Published in : Phys. Procedia 37 (2012) 2063-2071
Elsevier Open Access article: PDF;
In : 2nd International Conference on Technology and Instrumentation in Particle Physics, Chicago, IL, USA, 9 - 14 Jun 2011, pp.2063-2071
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10.
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Study of Transverse Pulse-to-Pulse Orbit Jitter at the KEK Accelerator Test Facility 2 (ATF2)
/ Resta-Lopez, J (Valencia U., IFIC) ; Alabau-Gonzalvo, J (Valencia U., IFIC) ; Bett, D R (Oxford U., JAI) ; Burrows, P N (Oxford U., JAI) ; Christian, G B (Oxford U., JAI) ; Davis, M R (Oxford U., JAI) ; Perry, C (Oxford U., JAI) ; Apsimon, R (CERN) ; Constance, B (CERN) ; Gerbershagen, A (CERN)
For future linear colliders the precise control and mitigation of pulse-to-pulse orbit jitter will be very important to achieve the required luminosity. Diagnostic techniques for the orbit jitter measurement and correction for multibunch operation are being addressed at the KEK Accelerator Test Facility 2 (ATF2) [...]
2012 - 3 p.
- Published in : Conf. Proc.: C1205201 (2012) , pp. MOPPR066
External link: Published from JaCoW
In : 3rd International Particle Accelerator Conference, New Orleans, LA, USA, 20 - 25 May 2012, pp.936-938
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