CERN Accelerating science

All CERN Accelerators documents

新增:
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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2017-10-18
11:43
Category Accelerators and storage rings - CERN-OBJ-AC-065.
Interconnect of LHC beam pipe
Interconnexion du tube de faisceau du LHC


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2017-10-18
11:34
Category Accelerators and storage rings - CERN-OBJ-AC-064.
Prototype LHC RF cavity
Prototype de cavité RF du LHC

Building 143

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2017-10-18
10:16
Category Accelerators and storage rings - CERN-OBJ-AC-063.
Rock samples from LEP/LHC tunnel excavation
Building 282

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2017-10-18
06:37
Characterization of Shielding for the CERN-SPS Vacuum Flanges With Respect to Beam Coupling Impedance / Kaltenbacher, Thomas (CERN) ; Vollinger, Christine (CERN)
Longitudinal multi-bunch instabilities in the CERN-SPS pose a serious limitation for future beam intensities required for high luminosity LHC. Hence, an impedance model for the SPS accelerator was developed from which one group of vacuum flanges could be identified as being a major culprit for these instabilities. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-WEPIK090 Fulltext: PDF;

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2017-10-18
06:37
Status of the FCC-hh Collimation System / Molson, James (Orsay, LAL) ; Bruce, Roderik (CERN) ; Faus-Golfe, Angeles (Orsay, LAL) ; Fiascaris, Maria (CERN) ; Krainer, Alexander (CERN) ; Redaelli, Stefano (CERN)
The future circular hadron collider (FCC-hh) will have an unprecedented proton beam energy of 50 TeV, and total stored beam energy of 8.4 GJ. We discuss current developments in the collimation system design, and methods with which the challenges faced due to the high energies involved can be mitigated. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-MOPAB001 Fulltext: PDF;

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2017-10-18
06:37
Electron Cloud Effects at the LHC and LHC Injectors / Rumolo, Giovanni (CERN) ; Bartosik, Hannes (CERN) ; Belli, Eleonora (Rome U. ; CERN) ; Dijkstal, Philipp (CERN ; Darmstadt, Tech. U.) ; Iadarola, Giovanni (CERN) ; Li, Kevin (CERN) ; Mether, Lotta (CERN) ; Romano, Annalisa (CERN) ; Schenk, Michael (Ecole Polytechnique, Lausanne ; CERN) ; Zimmermann, Frank (CERN)
Electron cloud effects are one of the main limitations of the performance of the LHC and its injectors. Enormous progress has been done in the simulation of the electron cloud build-up and of the effects on beam stability while mitigation measures have been identified and implemented (scrubbing, low secondary electron yield coatings, etc.). [...]
2017 - 7 p. - Published in : 10.18429/JACoW-IPAC2017-MOZA1 Fulltext: PDF;

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2017-10-18
06:37
Ultimate Field Gradient in Metallic Structures / Wuensch, Walter (CERN)
Significant progress has been made over the past decade by studies of normal-conducting linear colliders, NLC/JLC (Next/Japanese Linear Collider) and CLIC (Compact Linear Collider), to raise achievable accelerating gradient from the range of 20-30 MV/m up to 100-120 MV/m. The gain has come through a greatly increased understanding of high-power rf phenomena, development of quantitative high-gradient rf design methods, refinements in cavity fabrication techniques and through development of high peak rf power sources. [...]
2017 - 6 p. - Published in : 10.18429/JACoW-IPAC2017-MOYCA1 Fulltext: PDF;

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2017-10-18
06:37
Approaching the Nominal Performance at the LHC / Wenninger, Jorg (CERN)
In 2015 the Large Hadron Collider (LHC) restarted for Run 2 after an almost two year long shutdown to consolidate the machine for operation at nominal beam energy. Following a month of recommissioning and training of the magnet system, the LHC operated for the first time at an energy of 6.5 TeV. [...]
2017 - 6 p. - Published in : 10.18429/JACoW-IPAC2017-MOYAA1 Fulltext: PDF;

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2017-10-18
06:37
Automatic Local Aperture Measurements in the SPS / Kain, Verena (CERN) ; Bartosik, Hannes (CERN) ; Cettour Cave, Stephane (CERN) ; Cornelis, Karel (CERN) ; Velotti, Francesco (CERN)
The CERN SPS (Super Proton Synchrotron) serves as LHC injector and provides beam for the North Area fixed target experiments. It is equipped with flat vacuum chambers to accommodate the large horizontal beam size required during transition crossing and slow extraction. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-THPAB147 Fulltext: PDF;

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