TY  - CONF
AU  - Valizadeh, R.
AU  - Colligon, J.S.
AU  - Dan, Y.
AU  - Dhanak, V.R.
AU  - Hannah, A.N.
AU  - Malyshev, O.B.
AU  - Mutch, J.
AU  - Sian, B.S.
AU  - Sykes, N.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - MULTIPACTOR SUPPRESSION BY LASER ABLATION SURFACE ENGINEERING FOR SPACE APPLICATIONS
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Developing a surface with low Secondary Electron Yield (SEY) is one of the main ways of mitigating electron cloud and beam-induced electron multipacting in high-energy charged particle accelerators and space-borne RF equipment for communication purposes. In this study we report on the secondary electron yield (SEY) measured from silver coated aluminium alloy as-received and after laser ablation surface engineering (LASE). Analysis shows the SEY can be reduced by 43% using LASE. EDX and SEM analysis shows it is possible to reduce the SEY whilst maintaining the original surface composition.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1365
EP  - 1368
KW  - electron
KW  - laser
KW  - multipactoring
KW  - GUI
KW  - controls
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPMP051
UR  - http://jacow.org/ipac2019/papers/tupmp051.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  -