CERN Accelerating science

LHC

Latest additions:
2014-08-22
08:24
Study on o-momentum tail scraping in the LHC / Mirarchi, D ; Redaelli, S ; Bruce, R
A study on o-momentum tail population in the LHC was performed through collimator scraping at high dispersion region. [...]
CERN-ACC-NOTE-2014-0061.
- 2014. - 13 p.

Detailed record - Similar records
2014-08-12
15:21
FEM Analysis of Beam-Coupling Impedance and RF Contacts Criticality of the LHC UA9 Piezo Goniometer / Danisi, A ; Zannini, C ; Passarelli, A ; Masi, A ; Losito, R ; Salvant, B
The UA9 piezo-goniometer has been designed to guarantee micro-radians-accuracy angular positioning of a silicon crystal for a crystal collimation experiment in the LHC, and to minimize the impact on the LHC beam coupling impedance. This paper presents a Finite Element Method (FEM) study of the device, in both parking and operational positions, to evaluate its impact on the LHC impedance budget. [...]
CERN-ACC-2014-0192.- Geneva : CERN, 2014 - 4 p. Fulltext: PDF;
In : 5th International Particle Accelerator Conference , Dresden, Germany, 15 - 20 Jun 2014, pp.4

Detailed record - Similar records
2014-08-12
15:03
FLUKA Simulation of Particle Fluences to ALICE due to LHC Injection Kicker Failures / Shetty, N V ; Bracco, C ; Di Mauro, A ; Lechner, A ; Leogrande, E ; Uythoven, J
The counter-rotating beams of the LHC are injected in insertion regions which also accommodate the ALICE and LHCb experiments. An assembly of beam absorbers ensures the protection of machine elements in case of injection kicker failures, which can affect either the injected or the stored beam. [...]
CERN-ACC-2014-0190.- Geneva : CERN, 2014 - 4 p. Fulltext: PDF;
In : 5th International Particle Accelerator Conference , Dresden, Germany, 15 - 20 Jun 2014, pp.4

Detailed record - Similar records
2014-08-12
14:44
Energy Deposition and Quench Level Calculations for Millisecond and Steady-State Quench Tests of LHC Arc Quadrupoles at 4 TeV / Shetty, N V ; Auchmann, B ; Chetvertkova, V ; Lechner, A ; Priebe, A ; Sapinski, M ; Verweij, A ; Wollmann, D
In 2013, beam-induced quench tests with 4 TeV protons were performed to probe the quench level of LHC arc quadrupole magnets at timescales corresponding to millisecond beam losses and steady-state losses. As the energy deposition in magnet coils cannot be measured directly, this study presents corresponding FLUKA simulations as well as estimates of quench levels derived with the QP3 code. [...]
CERN-ACC-2014-0189.- Geneva : CERN, 2014 - 5 p. Fulltext: PDF;
In : 5th International Particle Accelerator Conference , Dresden, Germany, 15 - 20 Jun 2014, pp.5

Detailed record - Similar records
2014-08-07
16:40
Mechanical Engineering and Design of Novel Collimators for HL-LHC / Carra, F ; Bertarelli, A ; Dallocchio, A ; Gentini, L ; Gradassi, P ; Maitrejean, G ; Manousos, A ; Mariani, N ; Mounet, N ; Quaranta, E et al.
In view of High Luminosity LHC (HL-LHC) upgrades, collimator materials may become a limit to the machine performance: the high RF impedance of Carbon-Carbon composites used for primary and secondary collimators can lead to beam instabilities, while the Tungsten alloy adopted in tertiary collimators exhibits low robustness in case of beam-induced accidents. An R&D; program has been pursued to develop new materials overcoming such limitations. [...]
CERN-ACC-2014-0184.- Geneva : CERN, 2014 - 5 p. Fulltext: PDF;
In : 5th International Particle Accelerator Conference , Dresden, Germany, 15 - 20 Jun 2014, pp.5

Detailed record - Similar records
2014-08-06
15:02
Construction and bench testing of a prototype rotatable collimator for the LHC / Markiewicz, T ; Bong, E ; Keller, L ; Aberle, O ; Bertarelli, A ; Gradassi, P ; Marsili, A ; Redaelli, S ; Rossi, A ; Salvachua, B et al.
A second generation prototype rotatable collimator has been fabricated at SLAC and delivered to CERN for further vacuum, metrology, function and impedance tests. [...]
CERN-ACC-2014-0181.
- 2014. - 4 p.
Full text

Detailed record - Similar records
2014-08-05
15:54
First beam background simulation studies at ir1 for high luminosity LHC / Kwee-Hinzmann†, R ; Gibson, S M ; Bregliozzi, G ; Bruce, R ; Cerutti, F ; Esposito, L S ; Kersevan, R ; Lechner, A ; Shetty, N V
In the High-Luminosity Large Hadron Collider (HL-LHC) Project, the LHC will be significantly upgraded to produce about an order of magnitude more of integrated luminosity per year than what was achieved in Run I (2011 and 2012 data) in ATLAS at IR1 and CMS at IR5. [...]
CERN-ACC-2014-0180.
- 2014. - 4 p.
Full text

Detailed record - Similar records
2014-08-05
14:51
Comparison of MERLIN/SixTrack for LHC Collimation Studies / Serluca , M ; Appleby, R B ; Molson, J ; Bruce, R ; Marsili, A ; Redaelli, S ; Salvachua, B ; Barlow, R J ; Rafique, H ; Toader, A et al.
Simulations of the LHC collimation system have been carried out in previous years with the well known SixTrack code with collimation features. [...]
CERN-ACC-2014-0179.
- 2014. - 3 p.

Detailed record - Similar records
2014-08-05
14:35
Beam dynamics in an electron lens with the wrap particle-in-cell code / Stancari†, G ; Redaelli, S ; Moens, V
Electron lenses are a mature technique for beam manipulation in colliders and storage rings. [...]
CERN-ACC-2014-0178.
- 2014. - 3 p.

Detailed record - Similar records
2014-08-05
14:15
Electron lenses for the large hadron collider / Stancari†, G ; Valishev, A ; Bruce, R ; Redaelli, S ; Rossi, A ; Salvachua Ferrando, B
Electron lenses are pulsed, magnetically confined electron beamswhose current-density profile is shaped to obtain the desired effect on the circulating beam. [...]
CERN-ACC-2014-0177.
- 2014. - 3 p.
Full text

Detailed record - Similar records