Publications by Philip Burrows


Challenges and Status of Tuning Simulations for CLIC Traditional Beam Delivery System

IPAC2018 - Proceedings Vancouver, BC, Canada (2018)

PN Burrows


A Massive Open Online Course on Particle Accelerators

IPAC2018 - Proceedings Vancouver, BC, Canada (2018)

PN Burrows


Performance of Nanometre-Level Resolution Cavity Beam Position Monitors at ATF2

IPAC2018 - Proceedings Vancouver, BC, Canada (2018)

PN Burrows


Development of a Low-Latency, High-Precision, Beam-Based Feedback System Based on Cavity BPMs at the KEK ATF2

IPAC2018 - Proceedings Vancouver, BC, Canada (2018)

PN Burrows


Measurements and Impact of Stray Fields on the 380 GeV Design of CLIC

IPAC2018 - Proceedings Vancouver, BC, Canada (2018)

PN Burrows


Stabilization of the arrival time of a relativistic electron beam to the 50 fs level

PHYSICAL REVIEW ACCELERATORS AND BEAMS (2018)

PN Burrows


Design and operation of a prototype interaction point beam collision feedback system for the International Linear Collider

PHYSICAL REVIEW ACCELERATORS AND BEAMS 21 (2018) ARTN 122802

RJ Apsimon, DR Bett, NB Kraljevic, RM Bodenstein, T Bromwich, PN Burrows, GB Christian, BD Constance, MR Davis, C Perry, R Ramjiawan


The Compact Linear e+e− Collider (CLIC) -- 2018 Summary Report

Cern European Organization for Nuclear Research -Reports- Cern (2018)

P BURROWS


Stabilization of the arrival time of a relativistic electron beam to the 50 fs level

PHYSICAL REVIEW ACCELERATORS AND BEAMS 21 (2018) ARTN 011001

J Roberts, P Skowronski, PN Burrows, GB Christian, R Corsini, A Ghigo, F Marcellini, C Perry


Compensation of orbit distortion due to quadrupole motion using feed-forward control at KEK ATF

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 895 (2018) 10-18

DR Bett, C Charrondiere, M Patecki, J Pfingstner, D Schulte, R Tomas, A Jeremie, K Kubo, S Kuroda, T Naito, T Okugi, T Tauchi, N Terunuma, PN Burrows, GB Christian, C Perry


A FAST, CUSTOM FPGA-BASED SIGNAL PROCESSOR AND ITS APPLICATIONS TO INTRA-TRAIN BEAM STABILISATION

Proceedings of PCaPAC2016, Campinas, Brazil (2017)

GB Christian, N Blaskovic Kraljevic, R Bodenstein, T Bromwich, PN Burrows, C Perry, R Ramjaiwan, J Roberts


Quantitative shadowgraphy and proton radiography for large intensity modulations.

Physical review. E 95 (2017) 023306-

MF Kasim, L Ceurvorst, N Ratan, J Sadler, N Chen, A Sävert, R Trines, R Bingham, PN Burrows, MC Kaluza, P Norreys

Shadowgraphy is a technique widely used to diagnose objects or systems in various fields in physics and engineering. In shadowgraphy, an optical beam is deflected by the object and then the intensity modulation is captured on a screen placed some distance away. However, retrieving quantitative information from the shadowgrams themselves is a challenging task because of the nonlinear nature of the process. Here, we present a method to retrieve quantitative information from shadowgrams, based on computational geometry. This process can also be applied to proton radiography for electric and magnetic field diagnosis in high-energy-density plasmas and has been benchmarked using a toroidal magnetic field as the object, among others. It is shown that the method can accurately retrieve quantitative parameters with error bars less than 10%, even when caustics are present. The method is also shown to be robust enough to process real experimental results with simple pre- and postprocessing techniques. This adds a powerful tool for research in various fields in engineering and physics for both techniques.


Higgs physics at the CLIC electron-positron linear collider.

The European physical journal. C, Particles and fields 77 (2017) 475-

H Abramowicz, A Abusleme, K Afanaciev, N Alipour Tehrani, C Balázs, Y Benhammou, M Benoit, B Bilki, J-J Blaising, MJ Boland, M Boronat, O Borysov, I Božović-Jelisavčić, M Buckland, S Bugiel, PN Burrows, TK Charles, W Daniluk, D Dannheim, R Dasgupta, M Demarteau, MA Díaz Gutierrez, G Eigen, K Elsener, U Felzmann, M Firlej, E Firu, T Fiutowski, J Fuster, M Gabriel, F Gaede, I García, V Ghenescu, J Goldstein, S Green, C Grefe, M Hauschild, C Hawkes, D Hynds, M Idzik, G Kačarević, J Kalinowski, S Kananov, W Klempt, M Kopec, M Krawczyk, B Krupa, M Kucharczyk, S Kulis, T Laštovička, T Lesiak, A Levy, I Levy, L Linssen, S Lukić, AA Maier, V Makarenko, JS Marshall, VJ Martin, K Mei, G Milutinović-Dumbelović, J Moroń, A Moszczyński, D Moya, RM Münker, A Münnich, AT Neagu, N Nikiforou, K Nikolopoulos, A Nürnberg, M Pandurović, B Pawlik, E Perez Codina, I Peric, M Petric, F Pitters, SG Poss, T Preda, D Protopopescu, R Rassool, S Redford, J Repond, A Robson, P Roloff, E Ros, O Rosenblat, A Ruiz-Jimeno, A Sailer, D Schlatter, D Schulte, N Shumeiko, E Sicking, F Simon, R Simoniello, P Sopicki, S Stapnes, R Ström, J Strube, KP Świentek, M Szalay, M Tesař, MA Thomson, J Trenado, UI Uggerhøj, N van der Kolk, E van der Kraaij, M Vicente Barreto Pinto, I Vila, M Vogel Gonzalez, M Vos, J Vossebeld, M Watson, N Watson, MA Weber, H Weerts, JD Wells, L Weuste, A Winter, T Wojtoń, L Xia, B Xu, AF Żarnecki, L Zawiejski, I-S Zgura

The Compact Linear Collider (CLIC) is an option for a future [Formula: see text] collider operating at centre-of-mass energies up to [Formula: see text], providing sensitivity to a wide range of new physics phenomena and precision physics measurements at the energy frontier. This paper is the first comprehensive presentation of the Higgs physics reach of CLIC operating at three energy stages: [Formula: see text], 1.4 and [Formula: see text]. The initial stage of operation allows the study of Higgs boson production in Higgsstrahlung ([Formula: see text]) and [Formula: see text]-fusion ([Formula: see text]), resulting in precise measurements of the production cross sections, the Higgs total decay width [Formula: see text], and model-independent determinations of the Higgs couplings. Operation at [Formula: see text] provides high-statistics samples of Higgs bosons produced through [Formula: see text]-fusion, enabling tight constraints on the Higgs boson couplings. Studies of the rarer processes [Formula: see text] and [Formula: see text] allow measurements of the top Yukawa coupling and the Higgs boson self-coupling. This paper presents detailed studies of the precision achievable with Higgs measurements at CLIC and describes the interpretation of these measurements in a global fit.


Effect and optimisation of non-linear chromatic aberrations of the CLIC drive beam recombination at CTF3

IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference (2016) 3852-3855

D Gamba, R Corsini, PK Skowronski, F Tecker, PN Burrows

Copyright © 2016 CC-BY-3.0 and by the respective authors. The CLIC design relies on the two-beam acceleration principle, i.e. the energy transfer from the so called drive beam to the main colliding beams. At the CLIC Test Facility (CTF3) at CERN the feasibility of this principle is being tested in terms of performance and achievable specifications. The high-current drive beam is generated by recombining its parts in a delay loop and a combiner ring. Preserving the drive beam emittance during the recombination process is crucial to ensure beam-current and power production stability. Present theoretical and experimental studies show that non-linear energy dependence of the transverse optics heavily spoils the quality of the recombined beam. Conventionally these effects are cured by means of non-linear corrections using sextupoles. In this work we propose a mitigation of these effects by optimising the linear lattice, leading to a more robust and easy to operate drive beam recombination complex. The latest results are presented.


Demonstration of CLIC level phase stability using a high bandwidth, low latency drive beam phase feedforward system at the CLIC test facility CTF3

IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference (2016) 2673-2676

J Roberts, A Andersson, R Corsini, PK Skowroński, PN Burrows, GB Christian, C Perry, A Ghigo, F Marcellini

Copyright © 2016 CC-BY-3.0 and by the respective authors. 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. A low-latency phase feedforward correction with bandwidth above 17.5 MHz will be used to reduce the drive beam phase jitter to this level. The proposed scheme corrects the phase using fast electromagnetic kickers to vary the path length in a chicane prior to the drive beam power extraction. A prototype of this system has been installed at the CLIC test facility CTF3 to prove its feasibility. The latest results from the system are presented, demonstrating phase stabilisation in agreement with simulations given the beam conditions and power of the kicker amplifiers. Necessary improvements in the phase monitor performance and optics corrections made to remove the phase-energy dependence via R56 in order to achieve this level of stability are also discussed.


High-gradient X-band RF technology for CLIC and beyond

Proceedings of Science Part F128556 (2016)

P Burrows, W Wuensch, T Argyropoulos

© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). The Compact Linear Collider (CLIC) project is exploring the possibility of constructing a multi-TeV linear electron-positron collider for high-energy frontier physics studies beyond the LHC era. The CLIC concept is based on high-gradient normal-conducting accelerating structures operating at X-band (12 GHz) frequency. We present the status of development, prototyping and testing of structures for operating at gradients of 100 MV/m and beyond. We report on high-power tests of these structures using the "XBOX" test facilities at CERN and summarize experience with operation at high-gradients. We give an overview of developments for application of the X-band technology to more compact accelerators for use e.g. as X-ray FELs and in medicine.


AWAKE, The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 829 (2016) 76-82

E Gschwendtner, E Adli, L Amorim, R Apsimon, R Assmann, A-M Bachmann, F Batsch, J Bauche, VKB Olsen, M Bernardini, R Bingham, B Biskup, T Bohl, C Bracco, PN Burrows, G Burt, B Buttenschoen, A Butterworth, A Caldwell, M Cascella, E Chevallay, S Cipiccia, H Damerau, L Deacon, R Dirksen, S Doebert, U Dorda, J Farmer, V Fedosseev, E Feldbaumer, R Fiorito, R Fonseca, F Friebel, AA Gorn, O Grulke, J Hansen, C Hessler, W Hofle, J Holloway, M Huether, D Jaroszynski, L Jensen, S Jolly, A Joulaei, M Kasim, F Keeble, Y Li, S Liu, N Lopes, KV Lotov, S Mandry, R Martorelli, M Martyanov, S Mazzoni, O Mete, VA Minakov, J Mitchell, J Moody, P Muggli, Z Najmudin, R Norreys, E Oez, A Pardons, K Pepitone, A Petrenko, G Plyushchev, A Pukhov, K Rieger, H Ruhl, E Salveter, N Savard, J Schmidt, A Seryi, E Shaposhnikova, ZM Sheng, R Sherwood, L Silva, L Soby, AP Sosedkin, RI Spitsyn, R Trines, PV Tuev, M Turner, V Verzilov, J Vieira, H Vincke, Y Wei, CP Welsch, M Wing, G Xia, H Zhang


Bunch-by-bunch position and angle stabilisation at ATF based on sub-micron resolution stripline beam position monitors

IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference (2016) 3859-3861

NB Kraljevic, RM Bodenstein, T Bromwich, PN Burrows, GB Christian, MR Davis, C Perry, R Ramjiawan, DR Bett

Copyright © 2016 CC-BY-3.0 and by the respective authors. 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. The BPM position data are digitised on a digital feedback board which is used to drive a pair of kickers local to the BPMs and nominally orthogonal in phase in closed-loop feedback mode, thus achieving both beam position and angle stabilisation. We report the reduction in jitter as measured at a witness stripline BPM located 30 metres downstream of the feedback system and its propagation to the AT F interaction point.


Development of a low-latency, micrometre-level precision, intra-train beam feedback system based on cavity beam position monitors

IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference (2016) 3862-3864

NB Kraljevic, RM Bodenstein, T Bromwich, PN Burrows, GB Christian, MR Davis, C Perry, R Ramjiawan, DR Bett

Copyright © 2016 CC-BY-3.0 and by the respective authors. A low-latency, intra-train, beam feedback system utilising a cavity beam position monitor (BPM) has been developed and tested at the final focus of the Accelerator Test Facility (ATF2) at KEK. A low-Q cavity BPM was utilised with custom signal processing electronics, designed for low latency and optimal position resolution, to provide an input beam position signal to the feedback system. A custom stripline kicker and power amplifier, and a digital feedback board, were used to provide beam correction and feedback control, respectively. The system was deployed in single-pass, multi-bunch mode with the aim of demonstrating intra-train beam stabilisation on electron bunches of charge ∼1 nC separated in time by c. 220 ns. The system has been used to demonstrate beam stabilisation to below the 75 nm level. Results of the latest beam tests, aimed at even higher performance, will be presented.


Path to AWAKE: Evolution of the concept

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 829 (2016) 3-16

A Caldwell, E Adli, L Amorim, R Apsimon, T Argyropoulos, R Assmann, A-M Bachmann, E Batsch, J Bauche, VKB Olsen, M Bernardini, R Bingham, B Biskup, T Bohl, C Bracco, PN Burrows, G Burt, B Buttenschoen, A Butterworth, M Cascella, S Chattopadhyay, E Chevallay, S Cipiccia, H Damerau, L Deacon, R Dirksen, S Doebert, U Dorda, E Eisen, J Farmer, S Fartoukh, V Fedosseev, E Feldbaumer, R Fiorito, R Fonseca, F Friebel, G Geschonke, B Goddard, AA Gorn, O Grulke, E Gschwendtner, J Hansen, C Hessler, S Hillenbrand, W Hofle, J Holloway, C Huang, M Huether, D Jaroszynski, L Jensen, S Jolly, A Joulaei, M Kasim, F Keeble, R Kersevan, N Kumar, Y Li, S Liu, N Lopes, KV Lotov, W Lu, J Machacek, S Mandry, I Martin, R Martorelli, M Martyanov, S Mazzoni, M Meddahi, L Merminga, O Mete, VA Minakov, J Mitchell, J Moody, A-S Mueller, Z Najmudin, TCQ Noakes, P Norreys, J Osterhoff, E Oez, A Pardons, K Pepitone, A Petrenko, G Plyushchev, J Pozimski, A Pukhov, O Reimann, K Rieger, S Roesler, H Ruhl, T Rusnak, E Salveter, N Savard, J Schmidt, H von der Schmitt, A Seryi, E Shaposhnikova, ZM Sheng, R Sherwood, L Silva, F Simon, L Soby, AP Sosedkin, RI Spitsyn, T Tajima, R Tarkeshian, H Timko, R Trines, T Tueckmantel, PV Tuev, M Turner, E Velotti, V Verzilov, J Vieira, H Vincke, Y Wei, CP Welsch, M Wing, G Xia, V Yakimenko, H Zhang, F Zimmermann

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