LHC Operational Experience of the 6.5 TeV Proton Run with ATS Optics

Pojer, Mirko; Albert, Markus; Alemany-Fernández, Reyes; Argyropoulos, Theodoros; Bravin, Enrico; Calia, Andrea; Crockford, Guy; Fartoukh, Stephane; Fuchsberger, Kajetan; Giachino, Rossano; Giovannozzi, Massimo; Hemelsoet, Georges-Henry; Hostettler, Michael; Höfle, Wolfgang; Le Borgne, Yannick; Nisbet, David; Ponce, Laurette; Redaelli, Stefano; Salvachua, Belen; Solfaroli, Matteo; Suykerbuyk, Ronaldus; Walsh, David; Wenninger, Jorg; Zerlauth, Markus

doi:10.18429/JACoW-IPAC2018-MOPMF050

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RIS citation export for MOPMF050: LHC Operational Experience of the 6.5 TeV Proton Run with ATS Optics

TY - CONF
AU - Pojer, M.
AU - Albert, M.
AU - Alemany-Fernández, R.
AU - Argyropoulos, T.
AU - Bravin, E.
AU - Calia, A.
AU - Crockford, G.E.
AU - Fartoukh, S.D.
AU - Fuchsberger, K.
AU - Giachino, R.
AU - Giovannozzi, M.
AU - Hemelsoet, G.H.
AU - Hostettler, M.
AU - Höfle, W.
AU - Le Borgne, Y.
AU - Nisbet, D.
AU - Ponce, L.
AU - Redaelli, S.
AU - Salvachua, B.
AU - Solfaroli, M.
AU - Suykerbuyk, R.
AU - Walsh, D.J.
AU - Wenninger, J.
AU - Zerlauth, M.
ED - Koscielniak, Shane
ED - Satogata, Todd
ED - Schaa, Volker RW
ED - Thomson, Jana
TI - LHC Operational Experience of the 6.5 TeV Proton Run with ATS Optics
J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018
C1 - Vancouver, BC, Canada
T2 - International Particle Accelerator Conference
T3 - 9
LA - english
AB - In May 2017, the CERN Large Hadron Collider (LHC) restarted operations at 6.5 TeV using the Achromatic Telescopic Squeeze (ATS) scheme with a target beta-star of 40 cm in ATLAS and CMS. The number of bunches was progressively increased to a maximum of 2556 with emittances of 2.5 um. In August, several machine parameters had to be re-tuned to mitigate beam loss induced instabilities and maintain a steady increase of the instantaneous luminosity. The use of a novel beam type and filling pattern produced in the injectors, allowed filling the machine with very low emittance beam (1.5 um) achieving an equivalent luminosity with 1868 bunches. In September, the beta-star was further lowered to 30 cm (using, for the first time, the telescopic technique of the ATS) and the bunch intensity pushed to 1.25·10¹¹ protons. In the last 3 months of 2017, the LHC produced more than 500 pb-1 of integrated luminosity per day, delivering to each of the high luminosity experiments 50.6 fb-1, 10% above the 2017 target. A general overview of the operational aspects of the 2017 proton run will be presented.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 216
EP - 219
KW - operation
KW - luminosity
KW - optics
KW - emittance
KW - proton
DA - 2018/06
PY - 2018
SN - 978-3-95450-184-7
DO - 10.18429/JACoW-IPAC2018-MOPMF050
UR - http://jacow.org/ipac2018/papers/mopmf050.pdf
ER -