CERN Accelerating science

ATS Notes

Последние добавления:
2017-12-22
10:53
Analysis of the beam induced heat loads on the LHC arc beam screens during Run 2 / Iadarola, Giovanni (CERN) ; Rumolo, Giovanni (CERN) ; Dijkstal, Philipp (Technische Universitaet Darmstadt (DE)) ; Mether, Lotta (EPFL - Ecole Polytechnique Federale Lausanne (CH))
During Run 2 the Large Hadron Collider (LHC) has been routinely operated with 25 ns bunch spacing [...]
CERN-ACC-NOTE-2017-0066.
- 2017. - 71 p.

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2017-12-20
15:28
Study of off-momentum losses at the start of the ramp in the Large Hadron Collider / Wretborn, Sven Joel (Linkoeping University (SE)) ; Bruce, Roderik (CERN) ; Garcia Morales, Hector (University of London (GB)) ; Sjobaek, Kyrre Ness (University of Oslo (NO))
At the start of the energy ramp at the LHC, any uncaptured beam is quickly lost on the momentum collimators. [...]
CERN-ACC-NOTE-2017-0065.
- 2017. - 37 p.
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2017-12-08
11:44
LHC β*-reach MD: aperture measurements at small β* / Fuster Martinez, Nuria (CERN) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN)
During this MD, performed on the 25th of July 2017, we measured the LHC aperture at top energy for β*=30 cm using the Transverse Damper (ADT) blow-up method. [...]
CERN-ACC-NOTE-2017-0064.
- 2017. - 13 p.
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2017-12-01
10:00
LHC Availability 2017: Standard Proton Physics / Todd, Benjamin (CERN) ; Ponce, Laurette (CERN) ; Apollonio, Andrea (CERN) ; Walsh, David John (CERN)
This document summarises the LHC machine availability for the period from restart to the end of standard proton physics in 2017. [...]
CERN-ACC-NOTE-2017-0063.
- 2017. - 20 p.

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2017-12-01
09:58
LHC Availability 2017: Technical Stop 2 to End of Standard Proton Physics / Todd, Benjamin (CERN) ; Ponce, Laurette (CERN) ; Apollonio, Andrea (CERN) ; Walsh, David John (CERN)
This document summarises the LHC machine availability for the period of Technical Stop 2 (TS2) to the end of standard proton physics in 2017. [...]
CERN-ACC-NOTE-2017-0062.
- 2017. - 14 p.

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2017-11-30
09:42
EM-Measurements and Evaluation of the XRP (Roman Pot to be installed with UA9 Experiment) / Farricker, Aaron (CERN) ; Popovic, Branko Kosta (CERN) ; Sunar, Ezgi ; Vollinger, Christine (CERN)
This Note discusses the EM-measurements and the impedance evaluation carried out on the XRP-experimental roman pot to complement the installation of the UA9 Experiment layout in the SPS for studies with a double-crystal setup (ECR SPS-TECS-EC-0001) implemented in 2017. [...]
CERN-ACC-NOTE-2017-0061.
- 2017. - 12 p.

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2017-11-08
12:21
MD 979: Beta-beating measurements on colliding beams / Goncalves Jorge, Patrik ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Buffat, Xavier (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fol, Elena (University of Applied Sciences (DE)) ; Langner, Andy Sven (CERN) ; Medina Medrano, Luis Eduardo (Universidad de Guanajuato (MX)) ; Olexa, Jakub (CERN) et al.
The HL-LHC high brightness beams will give a large β-beating due to the head-on and long-range interactions since a beam-beam parameter of 0.01 per Interaction Point (IP) is expected. [...]
CERN-ACC-NOTE-2017-0060.
- 2017. - 13 p.
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2017-11-06
10:56
FLUKA Monte Carlo Modelling of the CHARM Facility’s Test Area: Update of the Radiation Field Assessment / Infantino, Angelo (CERN)
The present Accelerator Note is a follow-up of the previous report CERN-ACC-NOTE-2016-12345. [...]
CERN-ACC-NOTE-2017-0059.
- 2017. - 38 p.
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2017-10-26
09:53
Automatic Angular alignment of LHC Collimators / Azzopardi, Gabriella (University of Malta (MT)) ; Valentino, Gianluca (University of Malta (MT)) ; Salvachua Ferrando, Belen Maria (CERN) ; Mereghetti, Alessio (CERN) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN)
The LHC is equipped with a complex collimation system to protect sensitive equipment from unavoidable beam losses [...]
CERN-ACC-NOTE-2017-0058.
- 2017. - 10 p.
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2017-10-19
15:27
Simulation studies on the electron cloud build-up in the elements of the LHC Arcs at 6.5 TeV / Dijkstal, Philipp (Technische Universitaet Darmstadt (DE)) ; Iadarola, Giovanni (CERN) ; Mether, Lotta (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Rumolo, Giovanni (CERN)
The formation of electron clouds in the arcs of the Large Hadron Collider (LHC) has been identified as one of the main limitations for the performance of the machine. [...]
CERN-ACC-NOTE-2017-0057.
- 2017. - 27 p.
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LHC MD Notes (84)