TY - CONF AU - Paraschou, K. AU - Iadarola, G. AU - Karastathis, N. AU - Kostoglou, S. AU - Papaphilippou, Y. AU - Sabato, L. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Analysis on Bunch-by-Bunch Beam Losses at 6.5 TeV in the Large Hadron Collider J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - In 2018, a large fraction of the physics data taking at the Large Hadron Collider has been performed with a beam energy of 6.5 TeV, the nominal bunch spacing of 25 ns and beta functions at the high luminosity interaction points of 30 cm. In order to maximize the integrated luminosity, the crossing angles are gradually reduced as the beam intensity reduces due to luminosity burn-off. In these conditions the beam lifetime is visibly affected by collective effects and in particular by beam-beam interaction and electron cloud effects. By analyzing the beam losses at a bunch-by-bunch level, it is possible to disentangle the contributions from different effects and to assess the impact on the losses of changes applied to the machine configuration. PB - JACoW Publishing CP - Geneva, Switzerland SP - 500 EP - 503 KW - luminosity KW - betatron KW - beam-losses KW - operation KW - collider DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPMP029 UR - http://jacow.org/ipac2019/papers/mopmp029.pdf ER - TY - CONF AU - Antoniou, F. AU - Albright, S.C.P. AU - Asvesta, F. AU - Bartosik, H. AU - Di Giovanni, G.P. AU - Forte, V. AU - Fraser, M.A. AU - Garcia-Tabares, A. AU - Huschauer, A. AU - Mikulec, B. AU - Prebibaj, T. AU - Santamaría García, A. AU - Skowroński, P.K. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Transverse Emittance Studies at Extraction of the CERN PS Booster J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Transverse emittance discrepancy in the beam transfer between the Proton Synchrotron Booster (PSB) and the Proton Synchrotron (PS) is observed in operational conditions for the LHC beams at CERN. The ongoing LHC Injectors Upgrade (LIU) project requires a tight budget for beam degradation along the injector chain and therefore the reason for this emittance discrepancy needs to be understood. Systematic measurements have been performed for various beam characteristics (beam intensity, transverse and longitudinal emittance). In this paper, a comparison between the emittance measurements using all available beam instrumentation with different emittance computation algorithms is presented. The results are compared to measurements at PS injection. Furthermore, the impact on the LIU project requirements for the emittance preservation along the LHC Injectors Complex is discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1058 EP - 1061 KW - emittance KW - optics KW - operation KW - booster KW - injection DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS087 UR - http://jacow.org/ipac2019/papers/mopts087.pdf ER - 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 - Sterbini, G. AU - Amorim, D. AU - Bartosik, H. AU - Bertarelli, A. AU - Bruce, R. AU - Buffat, X. AU - Carra, F. AU - Carver, L.R. AU - Cattenoz, G. AU - Effinger, E. AU - Fartoukh, S.D. AU - Fitterer, M. AU - Fuster-Martínez, N. AU - Gonzalez-Berges, M. AU - Gorzawski, A.A. AU - Gąsior, M. AU - Hemelsoet, G.H. AU - Hostettler, M. AU - Iadarola, G. AU - Jones, O.R. AU - Kaltchev, D. AU - Karastathis, N. AU - Kostoglou, S. AU - Lamas Garcia, I. AU - Levens, T.E. AU - Levichev, A.E. AU - Medina Medrano, L.E. AU - Mirarchi, D. AU - Olexa, J. AU - Papadopoulou, S. AU - Papaphilippou, Y. AU - Pellegrini, D. AU - Pojer, M. AU - Ponce, L. AU - Poyet, A. AU - Redaelli, S. AU - Rossi, A. AU - Salvachua, B. AU - Schmickler, H. AU - Schmidt, F. AU - Skoufaris, K. AU - Solfaroli, M. AU - Tomás, R. AU - Trad, G. AU - Valishev, A. AU - Valuch, D. AU - Xu, C. AU - Zamantzas, C. AU - Zisopoulos, P. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - First Results of the Compensation of the Beam-Beam Effect with DC Wires in the LHC J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The compensation of the long-range beam-beam interactions using DC wires is presently under study as an option for enhancing the machine performance in the frame of the High-Luminosity LHC project (HL-LHC). The original idea dates back more than 15 years. After the installation of four wire prototypes in the LHC in 2018, a successful experimental campaign was performed during the last months. The experimental setup and the main results are reported in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2262 EP - 2265 KW - experiment KW - beam-beam-effects KW - operation KW - collider KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEYYPLM3 UR - http://jacow.org/ipac2019/papers/weyyplm3.pdf ER - TY - CONF AU - Rosenthal, M.S. AU - Booth, A.C. AU - Charitonidis, N. AU - Chatzidaki, Y. AU - Karyotakis, Y. AU - Nowak, E.M. AU - Ortega Ruiz, I. AU - Sala, P.R. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Commissioning Results of the Tertiary Beam Lines for the CERN Neutrino Platform Project J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - For many decades the CERN North Area facility at the Super Proton Synchrotron (SPS) has delivered secondary beams to various fixed target experiments and test beams. In 2018, two new tertiary extensions of the existing beam lines, designated "H2-VLE" and "H4-VLE", have been constructed and successfully commissioned. These beam lines have been designed to provide charged particles of both polarities in the momentum range from 0.3 GeV/c to 12 GeV/c. During the design phase, multiple simulation tools and techniques have been employed to optimize the tertiary beam line layout in terms of particle production, transverse beam dynamics and particle identification on an event-by-event basis. In this paper, a comparison of the simulated performance and the first measurement results obtained during the commissioning phase are presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3738 EP - 3741 KW - MMI KW - target KW - experiment KW - positron KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW064 UR - http://jacow.org/ipac2019/papers/thpgw064.pdf ER -