[HTML][HTML] Reaching record-low β* at the CERN Large Hadron Collider using a novel scheme of collimator settings and optics

R Bruce, C Bracco, R De Maria, M Giovannozzi… - Nuclear Instruments and …, 2017 - Elsevier
Abstract The Large Hadron Collider (LHC) at CERN is built to collide intense proton beams
with an unprecedented energy of 7 TeV. The design stored energy per beam of 362 MJ …

Run 2 collimation overview

N Fuster Martinez, J Wagner, G Valentino, A Rossi… - 2019 - cds.cern.ch
The LHC collimation system is designed to provide protection against regular and abnormal
losses in order to reduce the risk of quenches of the superconducting magnets as well as the …

Review of LHC RUN 2 machine configurations

R Bruce, D Mirarchi, S Redaelli, N Fuster-Martínez… - 2019 - cds.cern.ch
Abstract During LHC Run 2, the LHC machine configuration evolved significantly. Starting
from a very careful approach in 2015, with the priority on stability and ease of …

LHC Run 2: Results and challenges

R Bruce, B Salvant, T Pieloni, KSB Li, E Metral, J Jowett… - 2016 - cds.cern.ch
The first proton run of the LHC was very successful and resulted in important physics
discoveries. It was followed by a two-year shutdown where a large number of improvements …

Operational results on the fully automatic LHC collimator alignment

G Azzopardi, B Salvachua, G Valentino, S Redaelli… - … Review Accelerators and …, 2019 - APS
The Large Hadron Collider has a complex collimation system installed to protect its sensitive
equipment from normal and abnormal beam losses. The collimators are set around the …

Cleaning performance of the collimation system of the High Luminosity Large Hadron Collider

D Mirarchi, A Bertarelli, F Cerutti, E Quaranta… - 2016 - cds.cern.ch
Different upgrades of the LHC will be carried out in the framework of the High Luminosity
project (HL-LHC), where the total stored energy in the machine will increase up to about 700 …

Anomaly detection for beam loss maps in the Large Hadron Collider

G Valentino, R Bruce, S Redaelli, R Rossi… - Journal of Physics …, 2017 - iopscience.iop.org
In the LHC, beam loss maps are used to validate collimator settings for cleaning and
machine protection. This is done by monitoring the loss distribution in the ring during …

Automatic angular alignment of LHC collimators

G Azzopardi, G Valentino, A Muscat, B Salvachua… - 2018 - um.edu.mt
The Large Hadron Collider (LHC) is equipped with a complex collimation system to protect
sensitive equipment from unavoidable beam losses. Collimators are positioned close to the …

Automatic detection of transverse beam instabilities in the Large Hadron Collider

TE Levens, K Łasocha, T Lefevre, M Gąsior… - … Review Accelerators and …, 2019 - APS
Transverse beam instabilities are a major cause of emittance dilution and beam losses in
high intensity hadron accelerators. This paper presents an overview of the system that has …

MD1447–β∗–Reach: 2016 IR7 Collimation Hierarchy Limit and Impedance

A Mereghetti, B Salvant, E Bonanno, E Metral… - 2020 - cds.cern.ch
This report summarizes the results of MD1447 about the hierarchy limit of the LHC
collimation system in IR7 at 6.5 TeV and its impedance, performed during MD block 1 of …