TY  - CONF
AU  - Keintzel, J.
AU  - Crouch, M.P.
AU  - Hofer, M.
AU  - Risselada, T.
AU  - Tomás, R.
AU  - Zimmermann, F.
AU  - van Riesen-Haupt, L.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - HE-LHC Optics Design Options
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The High Energy Large Hadron Collider (HE-LHC), a possible successor of the High Luminosity Large Hadron Collider (HL-LHC) aims at reaching a centre-of-mass energy of about 27 TeV using basically the same 16 T dipoles as for the hadron-hadron Future Circular Collider FCC-hh. Designing the HE-LHC results in a trade off between energy reach, beam stay clear as well as geometry offset with respect to the LHC. In order to best meet the requirements, various arc cell and dispersion suppressor options have been generated and analysed, before concluding on two baseline options, which are presented in this paper. Merits of each design are highlighted and possible solutions for beam stay clear minima are presented.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 492
EP  - 495
KW  - dipole
KW  - lattice
KW  - quadrupole
KW  - hadron
KW  - optics
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPMP026
UR  - http://jacow.org/ipac2019/papers/mopmp026.pdf
ER  - 

TY  - CONF
AU  - Keintzel, J.
AU  - Coello de Portugal, J.M.
AU  - Dilly, J.
AU  - Fol, E.
AU  - Garcia-Tabares, A.
AU  - Hofer, M.
AU  - Maclean, E.H.
AU  - Malina, L.
AU  - Persson, T.H.B.
AU  - Tomás, R.
AU  - Wegscheider, A.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Second Order Dispersion Measurements in 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 quadratic dependence of the orbit on the relative momentum offset, also known as second order dispersion, is analysed for the first time for the LHC. In this paper, the measurement and analysis procedure are described. Results and implications on future optics are discussed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 496
EP  - 499
KW  - optics
KW  - dipole
KW  - coupling
KW  - quadrupole
KW  - betatron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPMP027
UR  - http://jacow.org/ipac2019/papers/mopmp027.pdf
ER  - 

TY  - CONF
AU  - Bergamaschi, M.
AU  - Aryshev, A.
AU  - Karataev, P.
AU  - Kieffer, R.
AU  - Lefèvre, T.
AU  - Lekomtsev, K.
AU  - Mazzoni, S.
AU  - Potylitsyn, A.
AU  - Schloegelhofer, A.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Recent Results using Incoherent Cherenkov Diffraction Radiation for Non-Invasive Beam Diagnostics
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - When a relativistic charged particle travels at a short distance from the surface of dielectric material Cherenkov Diffraction Radiation (ChDR) is produced inside the dielectric. Recent observation of incoherent ChDR in the visible spectrum has opened the possibility of using this radiation for non-invasive beam size and position measurements. An experimental test to study this technique for highly directional beam position measurement has been initiated on the CLEAR facility at CERN, whilst another experimental investigation is underway at the Accelerator Test Facility 2 (ATF2) at KEK, Japan, to measure the resolution limit of ChDR for beam imaging diagnostics. This contribution presents the latest experimental results from both of these test facilities.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2654
EP  - 2657
KW  - radiation
KW  - experiment
KW  - photon
KW  - diagnostics
KW  - beam-diagnostic
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPGW077
UR  - http://jacow.org/ipac2019/papers/wepgw077.pdf
ER  -