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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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Transverse Beam Phase-Space Measurement Experience at CTF3
/ Gamba, Davide (CERN) ; Constance, Ben (CERN) ; Corsini, Roberto (CERN) ; Döbert, Steffen (CERN) ; Malina, Lukas (CERN) ; Martin, Lucy (JAI, UK) ; Peirson Serratosa, Abel (Oxford U.) ; Persson, Tobias (CERN) ; Roberts, Jack (CERN) ; Rollings, Alexandra (CERN) et al.
One of the objective of the CLIC Test Facility (CTF3) at CERN is to demonstrate the CLIC Drive Beam Recombination concept. An accurate control of the transverse beam parameters is necessary in order to succeed in preserving the beam quality after the recombination. [...]
CERN-ACC-2017-116; CLIC-Note-1115.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPAB115
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPAB115
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Fulltext
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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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Demonstration of CLIC Level Phase Stability using a High Bandwidth, Low Latency Drive Beam Phase Feedforward System at the CLIC Test Facility CTF3
/ Roberts, Jack (Oxford U., JAI ; CERN) ; Andersson, Alexandra (CERN) ; Burrows, Philip (Oxford U., JAI) ; Christian, Glenn (Oxford U., JAI) ; Corsini, Roberto (CERN) ; Ghigo, Andrea (Frascati) ; Marcellini, Fabio (Frascati) ; Perry, Colin (Oxford U., JAI) ; Skowroński, Piotr (CERN)
The CLIC acceleration scheme, in which the RF power used to accelerate the main high energy beam is extracted from a second high intensity but low energy beam, places strict requirements on the phase stability of the power producing drive beam. To limit luminosity loss caused by energy jitter leading to emittance growth in the final focus to below 1%, 0.2 degrees of 12 GHz, or 50 fs, drive beam phase stability is needed. [...]
CERN-ACC-2016-205; CLIC-Note-1092.-
2016 - 4 p.
- Published in : 10.18429/JACoW-IPAC2016-WEPOR006
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.WEPOR006
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First Results From Beam Tests of the CLIC Drive Beam Phase Feedforward Prototype at CTF3
/ Roberts, Jack (Oxford U., JAI) ; Andersson, Alexandra (CERN) ; Burrows, Philip (Oxford U., JAI) ; Christian, Glenn (Oxford U., JAI) ; Corsini, Roberto (CERN) ; Ghigo, Andrea (Frascati) ; Marcellini, Fabio (Frascati) ; Perry, Colin (Oxford U., JAI) ; Skowroński, Piotr (CERN)
In the CLIC two beam acceleration scheme 100 MV/m normal conducting cavities are fed with RF power extracted from a secondary high power but low energy drive beam. To ensure the efficiency and luminosity performance of CLIC the phase synchronisation between the high energy main beam and the drive beam must be maintained to within 0.2 degrees of 12 GHz. [...]
CERN-ACC-2015-303.-
2015 - 4 p.
- Published in : (2015) , pp. MOPWI001
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.MOPWI001
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Design, Hardware Tests and First Results From the CLIC Drive Beam Phase Feed-Forward Prototype at CTF3
/ Roberts, Jack (CERN ; Oxford U., JAI) ; Andersson, Alexandra (CERN) ; Skowronski, Piotr K (CERN) ; Burrows, Philip N (Oxford U., JAI) ; Christian, Glenn B (Oxford U., JAI) ; Perry, Colin (Oxford U., JAI) ; Ghigo, Andrea (INFN, LNS) ; Marcellini, Fabio (INFN, LNS)
In the CLIC two beam acceleration concept the phase synchronisation between the main beam and the RF power extracted from the drive beam must be maintained to within 0.2 degrees of 12 GHz. A drive beam phase feed-forward system with bandwidth above 17.5 MHz is required to reduce the drive beam phase jitter to this level. [...]
CERN-ACC-2014-406.-
2014 - 3 p.
- Published in : (2014) , pp. MOPP033
Fulltext: PDF; External link: JACoW server
In : 27th Linear Accelerator Conference, Geneva, Switzerland, 31 Aug - 5 Sep 2014, pp.MOPP033
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Status of the CLIC-UK R&D; Programme on Design of Key Systems for the Compact Linear Collider
/ Burrows, Philip (Oxford U., JAI) ; Ainsworth, Robert (Oxford U., JAI) ; Aumeyr, Thomas (Oxford U., JAI) ; Bett, Douglas (Oxford U., JAI) ; Blaskovic Kraljevic, Neven (Oxford U., JAI) ; Bobb, Lorraine (Oxford U., JAI) ; Boogert, Stewart (Oxford U., JAI) ; Bosco, Alessio (Oxford U., JAI) ; Christian, Glenn (Oxford U., JAI) ; Corner, Laura (Oxford U., JAI) et al.
Six UK institutes are engaged in a collaborative R&D; programme with CERN aimed at demonstrating key aspects of technology feasibility for the Compact Linear Collider (CLIC). We give an overview and status of the R&D; being done on: 1) Drive-beam components: quadrupole magnets and the beam phase feed-forward prototype. [...]
2014 - 4 p.
- Published in : , pp. TUPME008
Fulltext: PDF; External link: Published version from JACoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.TUPME008
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