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11.

White Rabbit and MTCA.4 Use in the LLRF Upgrade for CERN’s SPS / Włostowski, Tomasz (CERN) ; Adrianek, Karol (CERN) ; Arruat, Michel (CERN) ; Baudrenghien, Philippe (CERN) ; Butterworth, Andrew (CERN) ; Daniluk, Grzegorz (CERN) ; Egli, Julien (CERN) ; Gill, John (CERN) ; Gingold, Tristan (CERN) ; González Cobas, Juan (CERN) et al.
The Super Proton Synchrotron (SPS) Low-level RF (LLRF) system at CERN was completely revamped in 2020. In the old system, the digital signal processing was clocked by a submultiple of the RF. [...]
2022 - 6 p. - Published in : JACoW ICALEPCS2021 (2022) 847-852 Fulltext: PDF;
In : 18th International Conference on Accelerator and Large Experimental Physics Control Systems, Online, 18 - 22 Oct 2021, pp.847-852

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12.

Code Generation Tools and Editor for Memory Maps / Plutecki, Przemyslaw (CERN) ; Bielawski, Bartosz Przemyslaw (CERN) ; Butterworth, Andrew (CERN)
Cheburashka, a toolset created in the Radio Frequency Group at CERN, has become an essential part of our hardware and software developments. Due to changing requirements, this toolset has been recently rewritten in C++ and Python. [...]
2020 - 4 p. - Published in : 10.18429/JACoW-ICALEPCS2019-MOPHA115 Fulltext: PDF;
In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.MOPHA115

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13.

First demonstration of the use of crab cavities on hadron beams / Calaga, R (CERN) ; Alekou, A (Manchester U.) ; Antoniou, F (CERN) ; Appleby, R B (Manchester U.) ; Arnaudon, L (CERN) ; Artoos, K (CERN) ; Arduini, G (CERN) ; Baglin, V (CERN) ; Barriere, S (CERN) ; Bartosik, H (CERN) et al.
Many future particle colliders require beam crabbing to recover geometric luminosity loss from the nonzero crossing angle at the interaction point (IP). A first demonstration experiment of crabbing with hadron beams was successfully carried out with high energy protons. [...]
2021 - 6 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 062001 Fulltext: PDF;

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14.

RF System Availability and Performance during Run 2 / Turaj, K (CERN) ; Arnaudon, L (CERN) ; Baudrenghien, P (CERN) ; Brunner, O (CERN) ; Butterworth, A (CERN) ; Gerigk, F (CERN) ; Montesinos, E (CERN) ; Shaposhnikova, E (CERN) ; Timko, H (CERN) ; Valuch, D (CERN)
The Run 2 operation and availability for the LHC RF system are presented, including year-to-year performance comparisons. In addition, the evolution of the present RF system is discussed, with improvements in diagnostics, operation, and software being highlighted. [...]
2019 - 4 p. - Published in : , pp. 99-102 Fulltext: PDF;
In : 9th LHC Operations Evian Workshop, Evian Les Bains, France, 30 Jan - 1 Feb 2019, pp.99-102

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15.

Operation Experience with the LHC ACS RF System / Turaj, Katarzyna (CERN) ; Arnaudon, Luca (CERN) ; Baudrenghien, Philippe (CERN) ; Brunner, Olivier (CERN) ; Butterworth, Andrew (CERN) ; Gerigk, Frank (CERN) ; Karppinen, Mikko (CERN) ; Maesen, Pierre (CERN) ; Montesinos, Eric (CERN) ; Peauger, Franck (CERN) et al.
The LHC accelerating RF system consists of two cryomodules per beam, each containing four single-cell niobium sputtered 400.8 MHz superconducting cavities working at 4.5 K and an average accelerating voltage of 2 MV. The paper summarises the experience, availability and evolution of the system within 10 years of operation. [...]
SRF2019.- 2019 - 4 p. - Published in : 10.18429/JACoW-SRF2019-THP031 Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.913-916

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16.

Machine protection experience from beam tests with crab cavity prototypes in the CERN SPS / Lindstrom, Bjorn (CERN ; Uppsala U. (main)) ; Bartosik, Hannes (CERN) ; Bohl, Thomas (CERN) ; Butterworth, Andrew (CERN) ; Calaga, Rama (CERN) ; Carver, Lee (CERN ; U. Liverpool (main)) ; Kain, Verena (CERN) ; Levens, Thomas (CERN) ; Papotti, Giulia (CERN) ; Secondo, Raffaello (CERN) et al.
Crab cavities (CCs) constitute a key component of the High Luminosity LHC (HL-LHC) project. In case of a failure, they can induce significant transverse beam offsets within tens of microseconds, necessitating a fast removal of the circulating beam to avoid damage to accelerator components due to losses from the displaced beam halo. [...]
CERN-ACC-2019-158.- 2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-MOPMP036 Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPMP036

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17.

Material options for the superconducting rf system of the Future Circular Collider / Aull, Sarah ; Brunner, Olivier (CERN) ; Butterworth, Andy (CERN) ; Schwerg, Nikolai
The design of the superconducting RF (SRF) systems of the Future Circular Collider (FCC) machine variants requires a thorough comparison of the different options for cavity material, oper- ating temperature and frequency. We collected representative SRF performance data at different frequencies and temperatures of bulk niobium as the standard technology and of niobium thin films as a potential alternative and develop a perspective for future performance for all material- frequency-temperature combinations as function of accelerating gradient. [...]
CERN-ACC-2018-0019.- Geneva : CERN, 2018 Fulltext: PDF;

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18.

Proposed RF Staging Scenario for FCC-ee / Brunner, O (CERN) ; Butterworth, A (CERN) ; Karpov, I (CERN) ; Aull, S (CERN) ; Schwerg, N (CERN)
2017 - 7 p. - Published in : ICFA Beam Dyn. Newsl.: 72 (2017) , pp. 89-95 Fulltext: PDF;

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19.

Commissioning and performance of a phase-compensated optical link for the AWAKE experiment at CERN / Barrientos, D. (CERN) ; Molendijk, J. (CERN) ; Butterworth, A. (CERN) ; Damerau, H. (CERN) ; Höfle, W. (CERN) ; Jaussi, M. (CERN)
In this work, we analyze the performance of the solution adopted for the compensation of the phase drift of a 3 km optical fiber link used for the AWAKE experiment at CERN. [...]
arXiv:1803.09039 ; LLRF2017/P-64 ; LLRF2017-P-64. - 2018. - 3 p.
Fulltext

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20.

Status and commissioning plans for LHC Run 2. The RF system. / Baudrenghien, P (CERN) ; Arnaudon, L (CERN) ; Bohl, T (CERN) ; Brunner, O (CERN) ; Butterworth, A (CERN) ; Maesen, P (CERN) ; Muller, J E (CERN) ; Ravida, G (CERN) ; Shaposhnikova, E (CERN) ; Timko, H (CERN)
The paper presents the work done on the LHC RF system during Long Shutdown 1 (LS1). On the High Level side we have replaced a cryomodule (four cavities, beam 2), which could not operate reliably at the design voltage (2 MV per cavity). The upgrade of klystron collectors has been completed and new crowbar systems have been installed (solid state thyristors replacing the old thyratrons). [...]
Geneva : CERN, 2014 - 6 p. - Published in : (2014) , pp. 99-104 Fulltext: PDF;
In : 5th Evian Workshop on LHC beam operation, Evian-les-Bains, France, 2 - 4 Jun 2014, pp.99-104

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See also: similar author names
5	Butterworth, A C
3	Butterworth, A L
16	Butterworth, A.
17	Butterworth, Andrew
5	Butterworth, Andy
1	Butterworth, Anna L

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