TY - CONF AU - D'Auria, G. AU - Aicheler, M. AU - Aksoy, A.A. AU - Alesini, D. AU - Apsimon, R. AU - Arnesano, J.M. AU - Bellaveglia, M. AU - Bernhard, A. AU - Bosco, F. AU - Buonomo, B. AU - Burt, G. AU - Calvi, M. AU - Cardelli, F. AU - Castaneda Cortes, H.M. AU - Castilla, A. AU - Clarke, J.A. AU - Croia, M. AU - Cross, A.W. AU - Dattoli, G. AU - Di Mitri, S. AU - Diomede, M. AU - Dowd, R.T. AU - Dunning, D.J. AU - Fang, W.D. AU - Faus-Golfe, A. AU - Ferrario, M. AU - Ficcadenti, L. AU - Gallo, A. AU - Gazis, E.N. AU - Gazis, N. AU - Geometrante, R. AU - Gethmann, J. AU - Giribono, A. AU - Goryashko, V.A. AU - Han, Y. AU - Jacewicz, M. AU - Janssen, X.J.A. AU - Kokole, M. AU - Latina, A. AU - Liu, X. AU - Luiten, O.J. AU - Marcos, J. AU - Marín, E. AU - Mostacci, A. AU - Mutsaers, P.H.A. AU - Muñoz Horta, R. AU - Nguyen, F. AU - Palumbo, L. AU - Petralia, A. AU - Piersanti, L. AU - Priem, J.M.A. AU - Pérez, F. AU - Rochow, R.A. AU - Rossi, C. AU - Ruber, R.J.M.Y. AU - Schmidt, T. AU - Schulte, D. AU - Spataro, B. AU - Stapnes, S. AU - Stragier, X.F.D. AU - Taylor, G. AU - Thompson, N. AU - Vaccarezza, C. AU - Wu, X.W. AU - Wuensch, W. AU - Zhang, K. AU - Zhang, L. AU - Zhu, D. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - The CompactLight Design Study Project J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The H₂020 CompactLight Project (www. CompactLight.eu) aims at designing the next generation of compact X-rays Free-Electron Lasers, relying on very high gradient accelerating structures (X-band, 12 GHz), the most advanced concepts for bright electron photo injectors, and innovative compact short-period undulators. Compared to existing facilities, the proposed facility will benefit from a lower electron beam energy, due to the enhanced undulators performance, and will be significantly more compact, with a smaller footprint,  as a consequence of the lower energy and the high-gradient X-band structures. In addition, the whole infrastructure will also have a lower electrical power demand as well as lower construction and running costs. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1756 EP - 1759 KW - FEL KW - linac KW - electron KW - undulator KW - brightness DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB032 UR - http://jacow.org/ipac2019/papers/tuprb032.pdf ER - TY - CONF AU - Angal-Kalinin, D. AU - Brynes, A.D. AU - Buckley, R.K. AU - Buckley, S.R. AU - Cash, R.J. AU - Castaneda Cortes, H.M. AU - Clarke, J.A. AU - Clarke, R.F. AU - Corlett, P.A. AU - Cowie, L.S. AU - Cox, G. AU - Dumbell, K.D. AU - Dunning, D.J. AU - Fell, B.D. AU - Goudket, P. AU - Goulden, A.R. AU - Griffiths, S.A. AU - Hancock, M.D. AU - Henderson, J. AU - Hindley, J.P. AU - Hodgkinson, C. AU - Jackson, F. AU - Jones, J.K. AU - Joshi, N.Y. AU - Mathisen, S.L. AU - McKenzie, J.W. AU - Middleman, K.J. AU - Militsyn, B.L. AU - Moss, A.J. AU - Muratori, B.D. AU - Noakes, T.C.Q. AU - Oates, A. AU - Pacey, T.H. AU - Roper, M.D. AU - Saveliev, Y.M. AU - Scott, D.J. AU - Shepherd, B.J.A. AU - Smith, R.J. AU - Smith, W. AU - Snedden, E.W. AU - Surman, M. AU - Thompson, N. AU - Tollervey, C. AU - Valizadeh, R. AU - Walsh, D.A. AU - Weston, T.M. AU - Wheelhouse, A.E. AU - Williams, P.H. AU - Wilson, J.T.G. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status of Clara Front End Commissioning and First User Experiments J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - CLARA (Compact Linear Accelerator for Research and Applications) is a test facility for Free Electron Laser (FEL) research and other applications at STFC’s Daresbury Laboratory. The first exploitation period using CLARA Front End (FE) provided a range of beam parameters to 12 user experiments. Beam line to Beam Area 1 (BA1) was commissioned and optimised for these experiments, some involving TW laser integration. In addition to the user exploitation programme, significant advances were made to progress on machine development. This paper summarises these developments and presents the near future plan for CLARA. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1851 EP - 1854 KW - laser KW - experiment KW - vacuum KW - linac KW - diagnostics DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB083 UR - http://jacow.org/ipac2019/papers/tuprb083.pdf ER - TY - CONF AU - Valizadeh, R. AU - Aliasghari, S. AU - Dawson, K. AU - Dhanak, V.R. AU - Hannah, A.N. AU - Malyshev, O.B. AU - Stenning, G.B.G. AU - Turner, D. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - PVD Depostion of Nb₃Sn Thin Film on Copper Substrate from an Alloy Nb₃Sn Target J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - In this study we report on the PVD deposition of Nb₃Sn on Cu substrates with and without a thick Nb interlayer to produce Cu/Nb/Nb₃Sn and Cu/Nb₃Sn multilayer structures. The Nb₃Sn was sputtered directly from an alloy target at room and elevated temperatures. The dependence of the superconducting properties of the total structure on deposition parameters has been determined. The films have been characterized via SEM, XRD, EDX and SQUID magnetometer measurements. Analysis showed that the composition at both room and elevated temperature was within the desired stoichiometry of 24’25 at%. However, superconductivity was only observed for deposition at elevated temperature or post annealing at 650 °C. The critical temperature was determined to be in the range of 16.8 to 17.4 K. In the case of bilayer deposition, copper segregation from the interface all the way to the surface was observed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2818 EP - 2821 KW - niobium KW - cavity KW - site KW - interface KW - HOM DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB011 UR - http://jacow.org/ipac2019/papers/weprb011.pdf ER - TY - CONF AU - Edwards, A.V. AU - Catalán Lasheras, N. AU - Gonzalez Anton, S. AU - McMonagle, G. AU - Pitman, S. AU - Woolley, B.J. AU - del Pozo Romano, V. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Connection of 12 GHz High Power RF from the XBOX 1 High Gradient Test Stand to the CLEAR Electron LINAC J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - A new RF system is being established at XBOX1 to drive two §I{100}{MV/m} CLIC structures in the CLEAR electron linac. In the past, these structures had been powered by RF from PET structures excited by a drive beam. This drive beam is no longer available. The upgrade will reroute power from the §I{50}{MW} klystron and pulse compressor which was previously used to power the structure in XBOX1. During the upgrade, the LLRF system will be optimised to improve the modulation of the output signals and down-mixing of the returning signals to obtain accurate phase and amplitude information. The design of the improved LLRF and software, along with phase noise measurements and comparisons with the old system are made in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2960 EP - 2963 KW - LLRF KW - klystron KW - linac KW - software KW - electron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB063 UR - http://jacow.org/ipac2019/papers/weprb063.pdf ER - TY - CONF AU - Castilla, A. AU - Burt, G. AU - Latina, A. AU - Liu, X. AU - Millar, W.L. AU - Wu, X.W. AU - Wuensch, W. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Ka-Band Linearizer Studies for a Compact Light Source J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The CompactLight project is currently developing the design of a next generation hard X-ray FEL facility, based on high-gradient X-band (12 GHz) structures, bright electron photo-injectors, and compact short period undulators. However, to improve the brightness limitations due to the non-linear energy spread of the electron bunches, a K-band (36 GHz) linearizer is being considered to provide a harmonic compensation during the bunch compression. In this paper, we analyze the feasibility of such linearizer. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2976 EP - 2979 KW - wakefield KW - klystron KW - impedance KW - FEL KW - flattop DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB068 UR - http://jacow.org/ipac2019/papers/weprb068.pdf ER - TY - CONF AU - Verdú-Andrés, S. AU - Ben-Zvi, I. AU - Burt, G. AU - Calaga, R. AU - Capatina, O. AU - Huque, N.A. AU - Li, Z. AU - McEwen, E.A. AU - Mitchell, J.A. AU - Park, H. AU - Powers, T. AU - Ratti, A. AU - Wu, Q. AU - Xiao, B.P. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Cryogenic RF Performance of Double-Quarter Wave Cavities Equipped with HOM Filters J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Crab cavities are one of the several components included in the luminosity upgrade of the Large Hadron Collider (HL-LHC). The cavities have to provide a nominal deflecting kick of 3.4 MV per cavity while the cryogenic load per cavity stays below 5 W. Cold RF tests confirmed the required performances in bare cavities, with several cavities exceeding the required voltage by more than 50%. However, the first tests of a Double-Quarter Wave (DQW) cavity with one out of three HOM filters did not reach the required voltage. The present paper describes the studies and tests conducted on a DQW cavity with HOM filter to understand the limiting factor. The recipe to meet the performance specification and exceed the voltage requirement by more than 35% is discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3043 EP - 3046 KW - cavity KW - HOM KW - operation KW - cryogenics KW - SRF DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB098 UR - http://jacow.org/ipac2019/papers/weprb098.pdf ER - TY - CONF AU - Appleby, R.B. AU - Boyd, T. AU - Edmonds, C.S. AU - Healy, A.L. AU - Hibberd, M.T. AU - Jeffrey, B. AU - Kyle, B.S. AU - Pacey, T.H. AU - Rafique, H. AU - Tygier, S.C. AU - Watson, R. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Tactile Collider : Accelerator Outreach to Visually Impaired Audiences J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Large Hadron Collider (LHC) has attracted significant attention from the general public. The science of the LHC and Higgs Boson is primarily communicated to school children and the wider public using visual methods. As a result, people with visual impairment (VI) often have difficulty accessing scientific communications and may be culturally excluded from news of scientific progress. Tactile Collider is a multi-sensory experience that aims to communicate particle accelerator science in a way that is inclusive of audiences with VI. These experiences are delivered as a 2-hour event that has been touring the UK since 2017. In this article we present the methods and training that have been used in implementing Tactile Collider as a model for engaging children and adults with science. The event has been developed alongside experts that specialise in making learning accessible to people with VI. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3518 EP - 3521 KW - collider KW - quadrupole KW - acceleration KW - detector KW - site DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPMP035 UR - http://jacow.org/ipac2019/papers/thpmp035.pdf ER - TY - CONF AU - Dosanjh, M. AU - Aggarwal, A. AU - Angal-Kalinin, D. AU - Apsimon, R. AU - Boogert, S.T. AU - Burt, G. AU - Coleman, N. AU - Collier, P. AU - Cross, A.W. AU - Konoplev, I.V. AU - McIntosh, P.A. AU - Militsyn, B.L. AU - Pistenmaa, D.A. AU - Sheehy, S.L. AU - Syratchev, I. AU - Wuensch, W. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Collaborative Strategies for Meeting the Global Need for Cancer Radiation Therapy Treatment Systems J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The idea of designing affordable equipment and developing sustainable infrastructures for delivering radiation treatment for patients with cancer in countries that lack resources and expertise stimulated a first International Cancer Expert Corps (ICEC) championed, CERN-hosted workshop in Geneva in November 2016. Which has since been followed by three additional workshops involving the sponsorship and support from UK Science and Technology Facilities Council (STFC). One of the major challenges in meeting this need to deliver radiotherapy in low- and middle-income countries (LMIC) is to design a linear accelerator and associated instrumentation system which can be operated in locations where general infrastructures and qualified human resources are poor or lacking, power outages and water supply fluctuations can occur frequently and where climatic conditions might be harsh and challenging. In parallel it is essential to address education, training and mentoring requirements for current, as well as future novel radiation therapy treatment (RTT) systems. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3526 EP - 3529 KW - linac KW - electron KW - radiation KW - vacuum KW - permanent-magnet DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPMP038 UR - http://jacow.org/ipac2019/papers/thpmp038.pdf ER - TY - CONF AU - Joshi, N.Y. AU - Dexter, A.C. AU - Henderson, J. AU - Jones, J.K. AU - Moss, A.J. AU - Snedden, E.W. AU - Wheelhouse, A.E. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Analysis of RF System Stability on CLARA J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Compact Linear Accelerator for Research and Applications (CLARA) facility at STFC Daresbury Laboratory will test underpinning concepts and technology for a next generation X-ray free electron laser (FEL). CLARA will use four S-band normal conducting traveling wave linacs to accelerate electron bunches to a maximum energy of 250 MeV. The amplitude and phase stability of the collected RF systems is critical in enabling CLARA to achieve low (10 fs) shot-to-shot timing jitter of the photon output. Here we present initial measurements and model of the amplitude and phase jitter of the CLARA RF systems, achieved by experimentally correlating the klystron output with controls from modulator, driver, and other environment parameters. The effect of the RF jitter on the CLARA beam momentum is also integrated in the model. PB - JACoW Publishing CP - Geneva, Switzerland SP - 4053 EP - 4056 KW - klystron KW - gun KW - linac KW - controls KW - cavity DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPRB097 UR - http://jacow.org/ipac2019/papers/thprb097.pdf ER -