Luminosity Scans for Beam Diagnostics
Accelerator Physics
2018-10-17 v3
Abstract
A new type of fast luminosity separation scans ("Emittance Scans") was introduced at the CERN Large Hadron Collider (LHC) in 2015. The scans were performed systematically in every fill with full-intensity beams in physics production conditions at the Interaction Point (IP) of the Compact Muon Solenoid (CMS) experiment. They provide both emittance and closed orbit measurements at a bunch-by-bunch level. The precise measurement of beam-beam closed orbit differences allowed a direct, quantitative observation of long-range beam-beam PACMAN effects, which agrees well with numerical simulations from an improved version of the TRAIN code.
Cite
@article{arxiv.1804.10099,
title = {Luminosity Scans for Beam Diagnostics},
author = {Michael Hostettler and Kajetan Fuchsberger and Giulia Papotti and Tatiana Pieloni and Yannis Papaphilippou},
journal= {arXiv preprint arXiv:1804.10099},
year = {2018}
}