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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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2.
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Bunch-by-bunch Position and Angle Stabilisation at ATF based on Sub-micron Resolution Stripline Beam Position Monitors
/ Blaskovic Kraljevic, Neven (Oxford U., JAI) ; Bett, Douglas (CERN) ; Bodenstein, Ryan (Oxford U., JAI) ; Bromwich, Talitha (Oxford U., JAI) ; Burrows, Philip (Oxford U., JAI) ; Christian, Glenn (Oxford U., JAI) ; Davis, Michael (Oxford U., JAI) ; Perry, Colin (Oxford U., JAI) ; Ramjiawan, Rebecca (Oxford U., JAI)
A low-latency, sub-micron resolution stripline beam position monitoring (BPM) system has been developed and tested with beam at the KEK Accelerator Test Facility (ATF2), where it has been used to drive a beam stabilisation system. The fast analogue front-end signal processor is based on a single-stage radio-frequency down-mixer, with a measured latency of 16 ns and a demonstrated single-pass beam position resolution of below 300 nm using a beam with a bunch charge of approximately 1 nC. [...]
CERN-ACC-2016-144.-
2016 - 3 p.
- Published in : 10.18429/JACoW-IPAC2016-THPOR034
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR034
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3.
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Performance of Nanometre-Level Resolution Cavity Beam Position Monitors and Their Application in an Intra-Train Beam Position Feedback System
/ Blaskovic Kraljevic, Neven (JAI, UK) ; Bambade, Philip (Orsay, LAL) ; Bett, Douglas (CERN) ; Bromwich, Talitha (JAI, UK) ; Burrows, Philip (JAI, UK) ; Christian, Glenn (JAI, UK) ; Jang, Si-Won (Korea U.) ; Perry, Colin (JAI, UK) ; Ramjiawan, Rebecca (JAI, UK) ; Tauchi, Toshiaki (KEK, Tsukuba) et al.
A system of three low-Q cavity beam position monitors (BPMs), installed in the interaction point (IP) region of the Accelerator Test Facility (ATF2) at KEK, has been designed and optimised for nanometre-level beam position resolution. The BPMs have been used to provide an input to a low-latency, intra-train beam position feedback system consisting of a digital feedback board and a custom stripline kicker with power amplifier. [...]
2017 - 4 p.
- Published in : 10.18429/JACoW-IBIC2016-TUPG16
Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.TUPG16
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4.
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A High-Resolution, Low-Latency, Bunch-by-Bunch Feedback System for Nano-Beam Stabilization
/ Ramjiawan, Rebecca (JAI, UK) ; Bett, Douglas (JAI, UK) ; Blaskovic Kraljevic, Neven (ESS, Lund) ; Bromwich, Talitha (Edinburgh U.) ; Burrows, Philip N (JAI, UK) ; Christian, Glenn B (Diamond Light Source) ; Perry, Colin (JAI, UK)
A low-latency, bunch-by-bunch feedback system employing high-resolution cavity Beam Position Monitors (BPMs) has been developed and tested at the Accelerator Test Facility (ATF2) at the High Energy Accelerator Research Organization (KEK), Japan. The feedback system was designed to demonstrate nanometer-level vertical stabilization at the focal point of the ATF2 and can be operated using either a single BPM to provide local beam stabilization, or by using two BPMs to stabilize the beam at an intermediate location. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 1378-1381
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1378-1381
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5.
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Intra-Train Position and Angle Stabilisation at ATF Based on Sub-Micron Resolution Stripline Beam Position Monitors
/ Blaskovic Kraljevic, Neven (JAI, UK) ; Bett, Douglas (CERN) ; Bromwich, Talitha (JAI, UK) ; Burrows, Philip (JAI, UK) ; Christian, Glenn (JAI, UK) ; Perry, Colin (JAI, UK) ; Ramjiawan, Rebecca (JAI, UK)
A low-latency, sub-micron resolution stripline beam position monitoring (BPM) system has been developed and tested with beam at the KEK Accelerator Test Facility (ATF2), where it has been used to drive a beam stabilisation system. The fast analogue front-end signal processor is based on a single-stage radio-frequency down-mixer, with a measured latency of 16 ns and a demonstrated single-pass beam position resolution of below 300 nm using a beam with a bunch charge of approximately 1 nC. [...]
2017 - 4 p.
- Published in : 10.18429/JACoW-IBIC2016-TUPG15
Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.TUPG15
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6.
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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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7.
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Ground Motion Compensation using Feed-forward Control at ATF2
/ Bett, Douglas (CERN) ; Charrondière, Cedric (CERN) ; Jeremie, Andrea (Annecy, LAPP) ; Kubo, Kiyoshi (KEK, Tsukuba) ; Kuroda, Shigeru (KEK, Tsukuba) ; Naito, Takashi (KEK, Tsukuba) ; Okugi, Toshiyuki (KEK, Tsukuba) ; Patecki, Marcin (CERN) ; Pfingstner, Juergen (CERN) ; Schulte, Daniel (CERN) et al.
Ground motion compensation using feed-forward control is a novel technique being developed to combat beam imperfections resulting from the vibration-induced misalignment of beamline components. The method is being evaluated experimentally at the KEK Accelerator Test Facility 2 (ATF2). [...]
CERN-ACC-2016-206.-
2016 - 3 p.
- Published in : 10.18429/JACoW-IPAC2016-WEPOR005
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.WEPOR005
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Simulation Studies of Intra-Train, Bunch-by-Bunch Feedback Systems at the International Linear Collider
/ Ramjiawan, Rebecca (JAI, UK ; CERN) ; Bett, Douglas (JAI, UK ; CERN) ; Bodenstein, Ryan (Jefferson Lab ; JAI, UK) ; Burrows, Philip (JAI, UK) ; Christian, Glenn (Diamond Light Source ; JAI, UK) ; Perry, Colin (JAI, UK)
The International Linear Collider (ILC) is a proposed electron-positron collider targeting collision energies from 250 GeV to 1 TeV. With design luminosities of order 10³⁴ cm²s⁻¹, a beam-based, intra-train feedback system would be required near the Interaction Point (IP) to provide nanometre-level stabilisation of the beam overlap in the collisions. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 861-864
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.861-864
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Contribution of Optical Aberrations to Spot-size Increase with Bunch Intensity at ATF2
/ Patecki, Marcin (CERN ; Warsaw U. of Tech.) ; Kubo, Kiyoshi (KEK, Tsukuba) ; Kuroda, Shigeru (KEK, Tsukuba) ; Naito, Takashi (KEK, Tsukuba) ; Okugi, Toshiyuki (KEK, Tsukuba) ; Tauchi, Toshiaki (KEK, Tsukuba) ; Terunuma, Nobuhiro (KEK, Tsukuba) ; Tomás, Rogelio (CERN) ; White, Glen (SLAC) ; Zimmermann, Frank (CERN)
A primary goal of ATF2 (Accelerator Test Facility) is to demonstrate a low vertical beam size at the interaction point (IP) of about 37 nm. Measurements over the past years indicate that the ATF2 vertical beam size strongly rises with bunch intensity. [...]
CERN-ACC-2015-324.-
2015 - 4 p.
- Published in : (2015) , pp. MOPJE065
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.MOPJE065
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10.
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Towards Ultra-Low β* in ATF2
/ Patecki, Marcin (CERN) ; Aloev, Alexander (CERN) ; Bett, Douglas (CERN) ; Kubo, Kiyoshi (KEK, Tsukuba) ; Marín, Eduardo (SLAC) ; Modena, Michele (CERN) ; Okugi, Toshiyuki (KEK, Tsukuba) ; Tauchi, Toshiaki (KEK, Tsukuba) ; Terunuma, Nobuhiro (KEK, Tsukuba) ; Tomás, Rogelio (CERN) et al.
The Accelerator Test Facility 2 (ATF2) has already demonstrated the feasibility of Final Focus Systems based on the local chromaticity correction scheme and its focusing capabilities by reaching a vertical beam size at the virtual Interaction Point (IP) of less than 50 nm. The value of the chromaticity in ATF2 is comparable with the expected chromaticity in ILC, but 4 times lower than in a design of CLIC. [...]
CERN-ACC-2015-353.-
2015 - 4 p.
- Published in : (2015) , pp. MOBC1
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.MOBC1
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