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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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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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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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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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5.
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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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6.
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A Fast, Custom FPGA-Based Signal Processor and Its Applications to Intra-Train Beam Stabilisation
/ Christian, Glenn (JAI, UK) ; Blaskovic Kraljevic, Neven (JAI, UK) ; Bodenstein, Ryan (JAI, UK) ; Bromwich, Talitha (JAI, UK) ; Burrows, Philip (JAI, UK) ; Perry, Colin (JAI, UK) ; Ramjiawan, Rebecca (JAI, UK) ; Roberts, Jack (CERN ; JAI, UK)
A custom 9-channel feedback controller has been developed for low-latency applications in beam-based stabilisation. Fast 14-bit ADCs and DACs are used for high-resolution signal conversion and a Xilinx Virtex-5 FPGA is used for core high-bandwidth digital computation. [...]
2017 - 4 p.
- Published in : 10.18429/JACoW-PCaPAC2016-FRFMPLCO05
Fulltext: PDF;
In : 11st International Workshop on Personal Computers and Particle Accelerator Controls, Campinas, Brazil, 25-28 Oct 2016, pp.FRFMPLCO05
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7.
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IP Feedback Ground Motion Simulation Studies for the ILC
/ Bodenstein, Ryan (JAI, UK) ; Blaskovic Kraljevic, Neven (JAI, UK) ; Bromwich, Talitha (JAI, UK) ; Burrows, Philip (JAI, UK) ; Christian, Glenn (JAI, UK) ; Perry, Colin (JAI, UK) ; Pfingstner, Juergen (CERN) ; Ramjiawan, Rebecca (JAI, UK)
The International Linear Collider (ILC), as described in its Technical Design Report (TDR), must maintain strict control of its electron and positron beams in order to achieve the desired luminosity at each of its proposed center-of-mass energies. Controlling the beam parameters requires a dynamic system, capable of adjusting to a myriad of perturbations and errors. [...]
CERN-ACC-2017-146.-
2017 - 3 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPIK111
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPIK111
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8.
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Optimisation of a High-Resolution, Low-Latency Stripline Beam Position Monitor System for Use in Intra-Train Feedback
/ Blaskovic Kraljevic, Neven (JAI, UK) ; Bett, Douglas (CERN) ; Bodenstein, Ryan (JAI, UK) ; Bromwich, Talitha (JAI, UK) ; Burrows, Philip (JAI, UK) ; Christian, Glenn (JAI, UK) ; Perry, Colin (JAI, UK) ; Ramjiawan, Rebecca (JAI, UK)
A high-resolution, low-latency beam position monitor (BPM) system has been developed for use in feedback systems at particle accelerators and beamlines that operate with trains of particle bunches with bunch separations as low as several tens of nanoseconds, such as future linear electron-positron colliders and free-electron lasers. The system was tested with electron beams in the extraction line of the Accelerator Test Facility at the High Energy Accelerator Research Organization (KEK) in Japan. [...]
CERN-ACC-2017-248.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-TUPIK110
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPIK110
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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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10.
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First Experimental Results with the CLIC Drive Beam Phase Feedforward Prototype at the CLIC Test Facility CTF3
/ Christian, Glenn B (JAI, UK) ; Andersson, Alexandra (CERN) ; Burrows, Philip (JAI, UK ; Oxford U.) ; Corsini, Roberto (CERN) ; Ghigo, Andrea (LNF, Dafne Light) ; Marcellini, Fabio (LNF, Dafne Light) ; Perry, Colin (JAI, UK ; Oxford U.) ; Roberts, Jack (CERN ; JAI, UK) ; Skowroński, Piotr (CERN)
The two-beam acceleration scheme envisaged for CLIC will require a high degree of phase stability between two beams at the drive beam decelerator sections, to allow efficient acceleration of the main beam. There will be up to 48 such decelerator sections for the full 3 TeV design, and each decelerator section will be instrumented with a feed-forward system to correct the drive beam phase to a precision of 0.2 degrees at 12 GHz relative to the main beam, using a kicker system around a four-bend chicane. [...]
2016 - 4 p.
- Published in : 10.18429/JACoW-IBIC2015-MOPB063
Fulltext: PDF;
In : International Beam Instrumentation Conference , Melbourne, Australia, 13 - 17 Sep 2015, pp.MOPB063
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