Performance of the Large Hadron Collider cleaning system during the squeeze: simulations and measurementsCitation formats

  • External authors:
  • R. Bruce
  • Daniele Mirarchi
  • S. Redaelli
  • A. Valloni

Standard

Performance of the Large Hadron Collider cleaning system during the squeeze: simulations and measurements. / Tygier, Samuel; Appleby, Robert; Bruce, R.; Mirarchi, Daniele; Redaelli, S.; Valloni, A.

In: Physical Review Accelerators and Beams, 2019.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Vancouver

Author

Tygier, Samuel ; Appleby, Robert ; Bruce, R. ; Mirarchi, Daniele ; Redaelli, S. ; Valloni, A. / Performance of the Large Hadron Collider cleaning system during the squeeze: simulations and measurements. In: Physical Review Accelerators and Beams. 2019.

Bibtex

@article{19c54ceb01c14a16b54cb64f13a52b8c,
title = "Performance of the Large Hadron Collider cleaning system during the squeeze: simulations and measurements",
abstract = "The Large Hadron Collider (LHC) at CERN is a 7 TeV proton synchrotron, with a design stored energy of 362 MJ per beam. The high-luminosity (HL-LHC) upgrade will increase this to 675 MJ per beam. In order to protect the superconducting magnets and other sensitive equipment from quenches and damage due to beam loss, a multilevel collimation system is needed. Detailed simulations are required to understand where particles scattered by the collimators are lost around the ring in a range of machine configurations. merlin++ is a simulation framework that has been extended to include detailed scattering physics, in order to predict local particle loss rates around the LHC ring. We compare merlin++ simulations of losses during the squeeze (the dynamic reduction of the β function at the interaction points before the beams are put into collision) with loss maps recorded during beam squeezes for run 1 and 2 configurations. The squeeze is particularly important, as both collimator positions and quadrupole magnet currents are changed. We can then predict, using merlin++, the expected losses for the HL-LHC to ensure adequate protection of the machine",
author = "Samuel Tygier and Robert Appleby and R. Bruce and Daniele Mirarchi and S. Redaelli and A. Valloni",
year = "2019",
doi = "arXiv:1807.04454",
language = "English",
journal = "Physical Review Accelerators and Beams",
issn = "2469-9888",
publisher = "American Physical Society",

}

RIS

TY - JOUR

T1 - Performance of the Large Hadron Collider cleaning system during the squeeze: simulations and measurements

AU - Tygier, Samuel

AU - Appleby, Robert

AU - Bruce, R.

AU - Mirarchi, Daniele

AU - Redaelli, S.

AU - Valloni, A.

PY - 2019

Y1 - 2019

N2 - The Large Hadron Collider (LHC) at CERN is a 7 TeV proton synchrotron, with a design stored energy of 362 MJ per beam. The high-luminosity (HL-LHC) upgrade will increase this to 675 MJ per beam. In order to protect the superconducting magnets and other sensitive equipment from quenches and damage due to beam loss, a multilevel collimation system is needed. Detailed simulations are required to understand where particles scattered by the collimators are lost around the ring in a range of machine configurations. merlin++ is a simulation framework that has been extended to include detailed scattering physics, in order to predict local particle loss rates around the LHC ring. We compare merlin++ simulations of losses during the squeeze (the dynamic reduction of the β function at the interaction points before the beams are put into collision) with loss maps recorded during beam squeezes for run 1 and 2 configurations. The squeeze is particularly important, as both collimator positions and quadrupole magnet currents are changed. We can then predict, using merlin++, the expected losses for the HL-LHC to ensure adequate protection of the machine

AB - The Large Hadron Collider (LHC) at CERN is a 7 TeV proton synchrotron, with a design stored energy of 362 MJ per beam. The high-luminosity (HL-LHC) upgrade will increase this to 675 MJ per beam. In order to protect the superconducting magnets and other sensitive equipment from quenches and damage due to beam loss, a multilevel collimation system is needed. Detailed simulations are required to understand where particles scattered by the collimators are lost around the ring in a range of machine configurations. merlin++ is a simulation framework that has been extended to include detailed scattering physics, in order to predict local particle loss rates around the LHC ring. We compare merlin++ simulations of losses during the squeeze (the dynamic reduction of the β function at the interaction points before the beams are put into collision) with loss maps recorded during beam squeezes for run 1 and 2 configurations. The squeeze is particularly important, as both collimator positions and quadrupole magnet currents are changed. We can then predict, using merlin++, the expected losses for the HL-LHC to ensure adequate protection of the machine

U2 - arXiv:1807.04454

DO - arXiv:1807.04454

M3 - Article

JO - Physical Review Accelerators and Beams

JF - Physical Review Accelerators and Beams

SN - 2469-9888

ER -