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2018-04-18
07:19
Electroweak precision measurements with the CMS detector / Bodek, A. (Rochester U.) /CMS Collaboration
We report on a precision measurement of the effective weak mixing angle using the forward-backward asymmetry of Drell-Yan ($ee$ and $\mu\mu$) events in pp collisions at $\sqrt{s}=8~\mathrm{TeV}$ at CMS. The data sample corresponds to an integrated luminosity of $18.8~\mathrm{fb}^{-1}$ and $19.6~\mathrm{fb}^{-1}$ for muon and electron channels, respectively. [...]
arXiv:1711.05288.- 2017-11-14 - 6 p. - Published in : PoS EPS-HEP2017 (2017) 429 Fulltext: PDF; Preprint: PDF; External link: PoS server
In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.429

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2018-04-18
06:13
Preparatory Work for a Fluorescence Based Profile Monitor for an Electron Lens / Udrea, Serban (Darmstadt, GSI) ; Barrios Diaz, Elena (CERN) ; Forck, Peter (Darmstadt, GSI) ; Jones, Owain Rhodri (CERN) ; Magagnin, Paolo (CERN) ; Schneider, Gerhard (CERN) ; Tzoganis, Vasilis (Cockcroft Inst. Accel. Sci. Tech.) ; Veness, Raymond (CERN) ; Welsch, Carsten (Cockcroft Inst. Accel. Sci. Tech.) ; Zhang, Hao (Cockcroft Inst. Accel. Sci. Tech.)
A hollow electron lens system is presently under development as part of the collimation upgrade for the high luminosity up-grade of LHC. Moreover, at GSI an electron lens system also is proposed for space charge compensation in the SIS-18 synchrotron to decrease the tune spread and allow for the high intensities at the future FAIR facility. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-TUPG73 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.TUPG73

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2018-04-18
06:13
Improvements to the LHC Schottky Monitors / Wendt, Manfred (CERN) ; Betz, Michael (CERN) ; Jones, Owain Rhodri (CERN) ; Lefèvre, Thibaut (CERN) ; Levens, Thomas (CERN)
The LHC Schottky monitors have the potential to measure and monitor some important beam parameters, e.g. tune, momentum spread, chromaticity and emittance, in a non-invasive way. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-TUPG46 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.TUPG46

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2018-04-18
06:13
The Cherenkov Detector for Proton Flux Measurement (CpFM) in the UA9 Experiment / Montesano, Simone (CERN) ; Addesa, Francesca (INFN, Rome) ; Burmistrov, Leonid (Orsay, LAL) ; Cavoto, Gianluca (INFN, Rome) ; Dubos, Sebastien (Orsay, LAL) ; Iacoangeli, Francesco (INFN, Rome) ; Puill, Véronique (Orsay, LAL) ; Scandale, Walter (CERN ; Orsay, LAL) ; Stocchi, Achille (Orsay, LAL)
The UA9 experiment at the CERN SPS investigates the possibility to use bent crystals to steer particles in high energy accelerators. In this framework the CpFM have been developed to measure the beam particle flux in different experimental situations. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-TUPG40 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.TUPG40

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2018-04-18
06:13
Scintillation and OTR Screen Characterization with a 440 GeV/c Proton Beam in Air at the CERN HiRadMat Facility / Burger, Stephane (CERN) ; Biskup, Bartolomej (Prague, Tech. U. ; CERN) ; Mazzoni, Stefano (CERN) ; Turner, Marlene (CERN ; Graz, Tech. U.)
Beam observation systems, based on charged particles passing through a light emitting screen, are widely used and often crucial for the operation of particle accelerators as well as experimental beamlines. The AWAKE experiment, currently under construction at CERN, requires a detailed understanding of screen sensitivity and the associated accuracy of the beam size measurement. [...]
2017 - 5 p. - Published in : 10.18429/JACoW-IBIC2016-MOPG78 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.MOPG78

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2018-04-18
06:13
Design and Performance of Coronagraph for Beam Halo Measurements in the LHC / Goldblatt, Aurelie (CERN) ; Bravin, Enrico (CERN) ; Mitsuhashi, Toshiyuki (KEK, Tsukuba) ; Roncarolo, Federico (CERN) ; Trad, Georges (CERN)
The CERN Large Hadron Collider is equipped with two Beam Synchrotron Radiation systems (BSR), one per beam. These systems are used to monitor the transverse distribution of the beam, its longitudinal distribution and the abort gap population. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-MOPG74 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.MOPG74

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2018-04-18
06:13
Optimized Cryogenic Current Comparator for CERN's Low-Energy Antiproton Facilities / Fernandes, Miguel (CERN ; U. Liverpool (main)) ; Alves, Diogo (CERN) ; Geithner, Rene (U. Jena (main) ; Helmholtz Inst., Jena) ; Koettig, Torsten (CERN) ; Lees, Andrew (CERN) ; Neubert, Ralf (U. Jena (main) ; Helmholtz Inst., Jena) ; Oponowicz, Ewa (CERN) ; Schwickert, Marcus (Darmstadt, GSI) ; Stöhlker, Thomas (U. Jena (main) ; Helmholtz Inst., Jena) ; Tan, Jocelyn (CERN) et al.
Non-perturbative measurement of low-intensity charged particle beams is particularly challenging for beam diagnostics due to the low amplitude of the induced electromagnetic fields. In the low-energy Antiproton Decelerator (AD) and the future Extra Low ENergy Antiproton (ELENA) rings at CERN, an absolute measurement of the beam intensity is essential to monitor operational efficiency and provide important calibration data for all AD experiments. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-MOPG48 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.MOPG48

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2018-04-18
06:13
Upgrade of the LHC Bunch by Bunch Intensity Measurement Acquisition System / Belohrad, David (CERN) ; Esperante Pereira, Daniel (CERN) ; Kral, Jiri (CERN) ; Pedersen, Stephane (CERN)
The fast beam intensity measurement systems for the LHC currently use an analogue signal processing chain to provide the charge information for individual bunches. This limits the possibility to use higher level correction algorithms to remove systematic measurement errors coming from the beam current transformer and the associated analogue electronics chain. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-MOPG39 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.MOPG39

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2018-04-18
06:13
Development of a Method for Continuous Functional Supervision of BLM Systems / Hajdu, Csaba F (CERN ; Budapest, Tech. U.) ; Daboczi, T (Budapest, Tech. U.) ; Zamantzas, Christos (CERN)
It is of vital importance to provide a continuous and comprehensive overview of the functionality of beam loss monitoring (BLM) systems, with particular emphasis on the connectivity and correct operation of the detectors. At CERN, a new BLM system for the pre-accelerators of the LHC is currently at an advanced stage of development. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-MOPG21 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.MOPG21

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2018-04-18
06:13
Diamond Monitor Based Beam Loss Measurements in the LHC / Xu, Chen (CERN) ; Dehning, Bernd (CERN) ; Domingues Sousa, Fernando (CERN) ; Griesmayer, Erich (Unlisted, AT)
Two pCVD Diamond based Beam Loss Monitors (dBLM) are installed near the primary collimators of the LHC, with a dedicated, commercial readout-system used to acquire their signals. The system is simultaneously able to produce a high sampling rate waveform and provide a real-time beam loss histogram for all bunches in the machine. [...]
2017 - 4 p. - Published in : 10.18429/JACoW-IBIC2016-MOPG19 Fulltext: PDF;
In : International Beam Instrumentation Conference, Barcelona, Spain, 11 - 15 Sep 2016, pp.MOPG19

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