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Published Articles

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2017-05-27
07:19
Measurement of basic characteristics and gain uniformity of a triple GEM detector / Patra, Rajendra Nath (Calcutta, VECC) ; Singaraju, Rama N. (Calcutta, VECC) ; Biswas, Saikat (CAPSS, Kolkata) ; Ahammed, Zubayer (Calcutta, VECC) ; Nayak, Tapan K. (Calcutta, VECC ; CERN) ; Viyogi, Yogendra P. (Calcutta, VECC)
Large area Gas Electron Multiplier (GEM) detectors have been the preferred choice for tracking devices in major nuclear and particle physics experiments. Uniformity over surface of the detector in terms of gain, energy resolution and efficiency is crucial for the optimum performance of these detectors. [...]
arXiv:1705.03849.- 2017-08-01 - 6 p. - Published in : Nucl.Instrum.Meth. A862 (2017) 25-30 Fulltext: PDF;

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2017-05-27
07:05
Fragmentation contributions to hadroproduction of prompt $J/\psi$, $\chi_{cJ}$, and $\psi(2S)$ states / Chung, Hee Sok (CERN)
We compute leading-power fragmentation corrections to hadroproduction of charmonium states J/ψ, χcJ , and ψ(2S) in the nonrelativistic QCD factorization formalism. We include fragmentation functions through order α 2 s and parton production cross sections through order α 3 s . [...]
SISSA, 2016 - 4 p. - Published in : PoS: ICHEP2016 (2016) , pp. 848 Fulltext: PDF; External link: PoS server
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016, pp.848

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2017-05-27
07:05
Measuring the Higgs-charm coupling with heavy quarkonia / Chung, Hee Sok (CERN)
We present a calculation of the Higgs boson decay into a quarkonium plus a photon and show that the branching ratio is sensitive to both the magnitude and sign of the Higgs-heavy quark coupling. Our numerical results include relativistic corrections, as well as logarithms of the Higgs mass divided by the heavy quark mass resummed to all orders in αs , which is carried out in the next-to-leading logarithmic accuracy. [...]
SISSA, 2016 - 4 p. - Published in : PoS: ICHEP2016 (2016) , pp. 847 Fulltext: PDF; External link: PoS server
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016, pp.847

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2017-05-27
07:05
Correlations in small systems with ALICE / Lakomov, Igor (CERN) /ALICE
ALICE is dedicated to the study of the strongly interacting matter, the so-called Quark-Gluon Plasma (QGP), formed in heavy-ion collisions at the LHC. In addition, ALICE also actively participated in the pp and p–Pb collision programs. [...]
SISSA, 2016 - 5 p. - Published in : PoS: ICHEP2016 (2016) , pp. 356 Fulltext: PDF; External link: PoS server
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016, pp.356

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2017-05-27
07:05
Kipper – a Grid bridge to Identity Federation / Kiryanov, Andrey (St. Petersburg, INP) ; Manzi, Andrea (CERN) ; Keeble, Oliver (CERN)
SISSA, 2016 - 7 p. - Published in : PoS: ISGC2016 (2016) , pp. 017 Fulltext: PDF; External link: PoS server
In : Proceedings, International Symposium on Grids and Clouds 2016: Ubiquitous e-infrastructures and Applications, Taipei, Taiwan, 13 - 18 Mar 2016, pp.017

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2017-05-27
07:05
Cryogenic Current Comparator for Storage Rings and Accelerators / Geithner, Rene (Helmholtz Inst., Jena ; Jena U.) ; Fernandes, Miguel (CERN ; Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Kurian, Febin (Darmstadt, GSI) ; Neubert, Ralf (Jena U.) ; Reeg, Hansjörg (Darmstadt, GSI) ; Schwickert, Marcus (Darmstadt, GSI) ; Seidel, Paul (Jena U.) ; Sieber, Thomas (Darmstadt, GSI) ; Stöhlker, Thomas (Darmstadt, GSI ; Helmholtz Inst., Jena ; Jena U.)
A Cryogenic Current Comparator (CCC) was developed for a non-destructive, highly sensitive monitoring of nA beams at the planned FAIR accelerator facility at GSI. The sensor part of the CCC was optimized for lowest possible noise-limited current resolution in combination with a high system bandwidth of about 200 kHz. [...]
2016 - 5 p. - Published in : 10.18429/JACoW-IBIC2015-MOPB013 Fulltext: PDF;
In : International Beam Instrumentation Conference , Melbourne, Australia, 13 - 17 Sep 2015, pp.MOPB013

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2017-05-27
07:05
Challenges of arbitrary waveform signal detection by Silicon Photomultipliers as readout for Cherenkov fibre based beam loss monitoring systems / Vinogradov, Sergey (Cockcroft Inst. Accel. Sci. Tech. ; Lebedev Inst. ; Liverpool U.) ; Devlin, Lee (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.) ; Nebot del Busto, Eduardo (Liverpool U. ; CERN) ; Kastriotou, Maria (Liverpool U. ; CERN) ; Welsch, Carsten P (Cockcroft Inst. Accel. Sci. Tech. ; Liverpool U.)
Silicon Photomultipliers (SiPMs) are well recognised as very competitive photodetectors due to their exceptional photon number and time resolution, room-temperature low-voltage operation, insensitivity to magnetic fields, compactness, and robustness. Detection of weak light pulses of nanosecond time scale appears to be the best area for SiPM applications because in this case most of the SiPM drawbacks have a rather limited effect on its performance. [...]
SISSA, 2015 - Published in : PoS: PhotoDet2015 (2016) , pp. 070 Fulltext: PDF; External link: PoS server

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2017-05-26
06:40
Mitigation of Collective Effects by Optics Optimization / Antoniou, F (CERN) ; Bartosik, H (CERN) ; Papaphilippou, Y (CERN)
2016 - 9 p. - Published in : ICFA Beam Dyn. Newsl.: 69 (2016) , pp. 276-284 Fulltext: PDF; External link: ICFA

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2017-05-26
06:40
Radiation Tolerance of Programmable Voltage Supply and High Galvanic Insulation Readout Electronics Used by CERN's LHC Cryogenics / Casas-Cubillos, Juan (CERN) ; Trikoupis, Nikolaos (CERN) ; Mekki, Julien (CERN)
Two new types of electronic cards have been tested in CERN's CHARM irradiation facility. The cards are a complete redesign of a programmable voltage power supply and a revision of a conditioning card used for resistance temperature sensors. [...]
2016 - 7 p. - Published in : IEEE Trans. Nucl. Sci. 63 (2016) 2022-2028

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2017-05-26
06:40
Early-stage fault isolation based on frequency response fitted by small-size samples for cryogenic cold compressors with active magnetic bearings / Arpaia, Pasquale (Naples U. ; CERN) ; De Vito, Luca (Sannio U. ; CERN) ; Girone, Mario (Sannio U.) ; Pezzetti, Marco (CERN)
A model-based method for fault detection and early-stage isolation, applicable when unfaulty conditions can be identified only by a reduced number of trials (even only one), is presented. The basic idea is to model analytically the uncertainty of the unfaulty frequency response and express the fault condition in terms of the noise power variance. [...]
2016 - Published in : Rev. Sci. Instrum. 87 (2016) 015108

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