Optics-measurement-based beam position monitor calibrations in the LHC insertion regions

AGT Valdivieso, R Tomás - Physical Review Accelerators and Beams, 2020 - APS
Accurate measurements of optics functions, β, α, D, are essential for proper operation of a
synchrotron both for machine protection and for performance. β functions can be obtained …

Optics measurement and correction strategies for HL-LHC

X Buffat, A Wegscheider, DW Wolf, H Garcia Morales… - 2022 - cds.cern.ch
Optics Measurement and Correction Strategies for HL-LHC Page 1 CERN-ACC-2022-0004
22/01/2024 CERN-ACC-2022-0004 . rogelio.tomas@cern.ch Optics Measurement and …

Fast-slow mode coupling instability for coasting beams in the presence of detuning impedance

N Biancacci, E Métral, M Migliorati - Physical Review Accelerators and Beams, 2020 - APS
A destabilizing effect of the detuning impedance has been recently observed in simulations
of the CERN Proton Synchrotron (PS) at the injection energy: while without the detuning …

[PDF][PDF] Machine learning methods for optics measurements and corrections at LHC

E Fol, FS Carlier, JMC de Portugal… - Proc. IPAC' …, 2018 - accelconf.web.cern.ch
The application of machine learning methods and concepts of artificial intelligence can be
found in various industry and scientific branches. In Accelerator Physics the machine …

JACoW: Momentum Compaction Factor Measurements in the Large Hadron Collider

J Keintzel, R Tomás García, L Malina - JACoW IPAC, 2021 - cds.cern.ch
Abstract The Large Hadron Collider (LHC) at CERN and its planned luminosity upgrade, the
High Luminosity LHC (HL-LHC) demand well-controlled on-and off-momentum optics …

[PDF][PDF] Harpy: A fast, simple and accurate harmonic analysis with error propagation

L Malina - … International Particle Accelerator Conf.(IPAC'22 …, 2022 - accelconf.web.cern.ch
Traditionally, in the accelerator physics field, accurate harmonic analysis has been
performed by iteratively interpolating the result of Fast Fourier Transform (FFT) in the …

[PDF][PDF] Transverse coupling measurements with high intensity beams using driven oscillations

T Persson, G Baud, X Buffat, JC de Portugal, E Fol… - Proc. IPAC'18, 2018 - epaper.kek.jp
Transverse linear coupling has been linked to instabilities and reduction in dynamic
aperture and it is hence a crucial parameter to control in the LHC. In this article we describe …

JACoW: SuperKEKB Optics Measurements Using Turn-by-Turn Beam Position Data

J Keintzel, G Mitsuka, A Morita, H Sugimoto… - JACoW IPAC, 2021 - cds.cern.ch
SuperKEKB, an asymmetric electron-positron collider, has recently achieved the world
record instantaneous luminosity of 2.8× 10³⁴\si {cm⁻ ²s⁻ ¹} using crab-waist collision …

[PDF][PDF] Optics measurements in storage rings based on simultaneous 3-dimensional beam excitation

L Malina, JMC de Portugal - Proc. IPAC'18, 2018 - accelconf.web.cern.ch
Optics measurements in storage rings usually employ excitation in both transverse
directions. This needs to be repeated at several different beam energies and is time …

[PDF][PDF] LHC optics measurment and correction software progress and plans

F Carlier, J Coello, J Dilly, E Fol… - Proceedings, 10th …, 2019 - academia.edu
Abstract LHC Optics Measurements and Corrections (OMC) require efficient on-line software
applications to acquire and analyze data and to compute the necessary corrections. During …