CERN Accelerating science

EU Funded Projects

Latest additions:
2016-06-28
16:16
The Industrial and Environmental Applications of Electron Beams / Chmielewska-Smietanko, Dagmara (unlisted, PL)
CERN-ACC-2016-0095.- Geneva : CERN, 2016 Fulltext: PDF;

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2016-06-22
16:02
Advances in Fiber Optic Sensors Technology Development for temperature and strain measurements in Superconducting magnets and devices / Chiuchiolo, A. (CERN) ; Bajas, H. (CERN) ; Bajko, M. (CERN) ; Bottura, L. (CERN) ; Consales, M. (Sannio U.) ; Cusano, A. (CERN) ; Giordano, M. (unlisted, IT) ; Perez, J. C. (CERN)
The luminosity upgrade of the Large Hadron Collider (HL-LHC) requires the development of a new generation of superconducting magnets based on Nb3Sn technology. In order to monitor the magnet thermo-mechanical behaviour during its service life, from the coil fabrication to the magnet operation, reliable sensing systems need to be implemented. [...]
CERN-ACC-2016-0094.- Geneva : CERN, 2016 - Published in : 10.1109/TASC.2016.2526654 Fulltext: DOCX.PDF;

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2016-06-22
15:50
Cryogenic-temperature profiling of high-power superconducting lines using local and distributed optical-fiber sensors / Chiuchiolo, Antonella (Sannio U. ; CERN) ; Palmieri, Luca (Sannio U. ; Padua U.) ; Consales, Marco (Sannio U.) ; Giordano, Michele (CNR, Portici) ; Borriello, Anna (CNR, Portici) ; Bajas, Hugues (CERN) ; Galtarossa, Andrea (Padua U.) ; Bajko, Marta (CERN) ; Cusano, Andrea (Sannio U.)
This contribution presents distributed and multi-point fiber-optic monitoring of cryogenic temperatures along a superconducting power transmission line down to 30 K and over 20 m distance. Multi-point measurements were conducted using fiber Bragg gratings sensors coated with two different functional overlays (epoxy and PMMA) demonstrating cryogenic operation in the range 300 – 4.2 K. [...]
CERN-ACC-2015-0219.- Geneva : CERN, 2015 - Published in : Optics Letters 40 (2015) 4424-4427 Fulltext: PDF;

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2016-06-22
15:25
Analysis of the quench propagation along Nb3Sn Rutherford cables with the THELMA code. Part II: application to the quench longitudinal propagation / Manfreda, G. (Udine U.) ; Bellina, F. (Udine U.) ; Bajas, H. (CERN) ; Perez, J.C. (CERN)
To improve the technology of the new generation of accelerator magnets, prototypes are being manufactured and tested in several laboratories. In parallel, many numerical analyses are being carried out to predict the magnets behaviour and interpret the experimental results. [...]
CERN-ACC-2016-0093.- Geneva : CERN, 2016 - Published in : 10.1016/j.cryogenics.2016.03.004 Fulltext: PDF;

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2016-06-22
15:16
Analysis of the quench propagation along Nb3Sn Rutherford cables with the THELMA code. Part I: geometric and thermal models / Manfreda, G. (Udine U.) ; Bellina F. (Udine U.)
The paper describes the new lumped thermal model recently implemented in THELMA code for the coupled electromagnetic–thermal analysis of superconducting cables. A new geometrical model is also presented, which describes the Rutherford cables used for the accelerator magnets. [...]
CERN-ACC-2016-0092.- Geneva : CERN, 2016 - Published in : 10.1016/j.cryogenics.2016.03.005 Fulltext: PDF;

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2016-06-21
17:06
Direct acceleration of electrons by a CO2 laser in a curved plasma waveguide / Yi, Longqing (Heinrich Heine U., Dusseldorf ; Shanghai, Inst. Optics, Fine Mech.) ; Pukhov, Alexander (Heinrich Heine U., Dusseldorf) ; Shen, Baifei (Shanghai, Inst. Optics, Fine Mech. ; Shanghai, Jiao Tong U.)
Laser plasma interaction with micro-engineered targets at relativistic intensities has been greatly promoted by recent progress in the high contrast lasers and the manufacture of advanced micro- and nano-structures. This opens new possibilities for the physics of laser-matter interaction. [...]
CERN-ACC-2016-0091.- Geneva : CERN, 2016 - Published in : Plasma Physics: arXiv:1603.02983 (2016) Fulltext: PDF;

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2016-06-21
16:54
Investigation of ionization-induced electron injection in a wakefield driven by laser inside a gas cell. / Audet, T. L. (LPGP, Orsay) ; Hansson, M. (Lund U.) ; Lee, P. (LPGP, Orsay) ; Desforges, F. G. (LPGP, Orsay) ; Maynard, G. (LPGP, Orsay) ; Dobosz Dufrenoy, S. (Saclay) ; Lehe, R. (LBNL, Berkeley) ; Vay, J.-L. (LBNL, Berkeley) ; Aurand, B. (Lund U.) ; Persson, A. (Lund U.) et al.
Ionization-induced electron injection was investigated experimentally by focusing a driving laser pulse with a maximum normalized potential of 1.2 at different positions along the plasma density profile inside a gas cell, filled with a gas mixture composed of 99%H2 þ 1%N2. Changing the laser focus position relative to the gas cell entrance controls the accelerated electron bunch properties, such as the spectrum width, maximum energy, and accelerated charge. [...]
CERN-ACC-2016-0090.- Geneva : CERN, 2016 - Published in : 10.1063/1.4942033 Fulltext: PDF;

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2016-06-21
11:07
Computation of External Quality Factors for RF Structures by Means of Model Order Reduction and a Perturbation Approach / Flisgen, Thomas (U. Rostock) ; Heller, Johann (U. Rostock) ; van Rienen, Ursula (U. Rostock)
External quality factors are significant quantities to describe losses via waveguide ports in radio frequency resonators. The current contribution presents a novel approach to determine external quality factors by means of a two-step procedure: First, a state-space model for the lossless radio frequency structure is generated and its model order is reduced. [...]
CERN-ACC-2016-0089.- Geneva : CERN, 2016 - Published in : Fulltext: PDF;
In : Conference on the Computation of Electromagnetic Fields 2015, Montréal, Québec, Canada, 28 Jun - 2 Jul 2015

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2016-06-21
10:59
Characterization of Thin Films Using Local Magneometer / Katzan N. (IRFU, Saclay) ; Antoine C.Z. (IRFU, Saclay)
SIS nanocomposite (Superconductor/Insulator/Superconductor) could improve the efficiency of bulk Nb accelerating cavities as proposed in 2006 by A. Gurevich [1]. [...]
CERN-ACC-2016-0088.- Geneva : CERN, 2016 - Published in : Fulltext: PDF;
In : 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015

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2016-06-21
10:49
Extending the Nonlinear-Beam-Dynamics Concept of 1D Fixed Points to 2D Fixed Lines / Franchetti, G. (GSI) ; Schmidt, F. (CERN)
The origin of nonlinear dynamics traces back to the study of the dynamics of planets with the seminal work of Poincaré at the end of the nineteenth century: Les Méthodes Nouvelles de la Mécanique Céleste, Vols. 1–3 (Gauthier Villars, Paris, 1899). [...]
CERN-ACC-2015-0218.- Geneva : CERN, 2015 - Published in : Phys. Rev. Lett. 114 (2015) 234801 Fulltext: PDF;

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