2018-10-16
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Notice détaillée - Notices similaires
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2018-10-16
06:47 |
Fabrication and Assembly Performance of the First 4.2 m MQXFA Magnet and Mechanical Model for the Hi-Lumi LHC Upgrade
/ Cheng, Daniel W (LBNL, Berkeley) ; Ambrosio, Giorgio (Fermilab) ; Anderssen, Eric C (LBNL, Berkeley) ; Bourcey, Nicolas (CERN) ; Felice, Helene (Saclay) ; Ferracin, Paolo (CERN) ; Grosclaude, Philippe (CERN) ; Guinchard, Michael (CERN) ; Perez, Juan Carlos (CERN) ; Pan, Heng (LBNL, Berkeley) et al.
The LHC accelerator research program (LARP), in collaboration with CERN and under the scope of the high luminosity upgrade of the Large Hadron Collider, is in the prototyping stage in the development of a 150 mm aperture high-field Nb$_3$Sn quadrupole magnet called MQXF. This magnet is mechanically supported using a shell-based support structure, which has been extensively demonstrated on several R&D; models within LARP, as well as in the more recent short (1.2 m magnetic length) MQXF model program. [...]
FERMILAB-PUB-17-372-TD.-
2018 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4006207
Fulltext: PDF; External link: FERMILABPUB
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2018-10-16
06:47 |
Study of the Secondary Electron Yield in Dielectrics Using Equivalent Circuital Models
/ Bañón-Caballero, David (CERN) ; Socuellamos, Juan M (Lancaster U. (main)) ; Mata, Rafael (Val Space Consortium, Valencia) ; Mercadé, Laura (U. Valencia (main)) ; Gimeno, Benito (U. Valencia (main)) ; Boria, Vicente E (Valencia, Polytechnic U.) ; Raboso, David (ESTEC, Noordwijk) ; Semenov, Vladimir E (Nizhnii Novgorod, IAP) ; Rakova, Elena I (Nizhnii Novgorod, IAP) ; Sanchez-Royo, Juan F (U. Valencia (main)) et al.
Secondary electron emission has an important role on the triggering of the multipactor effect; therefore, its study and characterization are essential in radio-frequency waveguide applications. In this paper, we propose a theoretical model, based on equivalent circuit models, to properly understand charging and discharging processes that occur in dielectric samples under electron irradiation for secondary electron emission characterization. [...]
2018 - 9 p.
- Published in : IEEE Trans. Plasma Sci. 46 (2018) 859-867
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2018-10-16
06:47 |
Notice détaillée - Notices similaires
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2018-10-16
06:47 |
Preparation and characterization of $^{33}$S samples for $^{33}$S(n,$\alpha$) $^{30}$Si cross-section measurements at the n_TOF facility at CERN
/ Praena, J (Granada U.) ; Ferrer, F J (CNA, Seville) ; Vollenberg, W (CERN) ; Sabaté-Gilarte, M (Seville U. ; CERN) ; Fernández, B (CNA, Seville ; Seville U.) ; García-López, J (CNA, Seville ; Seville U.) ; Porras, I (Granada U.) ; Quesada, J M (Seville U.) ; Altstadt, S (Goethe U., Frankfurt (main)) ; Andrzejewski, J (Lodz U.) et al.
/n_TOF
Thin 33 S samples for the study of the 33 S(n, α ) 30 Si cross-section at the n_TOF facility at CERN were made by thermal evaporation of 33 S powder onto a dedicated substrate made of kapton covered with thin layers of copper, chromium and titanium. This method has provided for the first time bare sulfur samples a few centimeters in diameter. [...]
2018 - 6 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 890 (2018) 142-147
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2018-10-16
06:47 |
Examining mitigation schemes for synchrotron radiation in high-energy hadron colliders
/ Guillermo, G (Merida, IPN ; CERN) ; Sagan, D (Cornell U., CLASSE) ; Zimmermann, F (CERN)
At high proton-beam energies, beam-induced synchrotron radiation is an important source of heating, of beam-related vacuum pressure increase, and of primary photoelectrons, which can give rise to an electron cloud. We use the synrad3d code developed at Cornell to simulate the photon distributions in the arcs of several existing, planned, or proposed highest-energy hadron colliders to analyze the efficiency of several techniques developed, or proposed, to mitigate the negative effects of synchrotron radiation, such as a sawtooth surface and slots in the beam screen..
2018 - 7 p.
- Published in : Phys. Rev. Accel. Beams 21 (2018) 021001
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2018-10-16
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2018-10-16
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Comprehensive study of beam focusing by crystal devices
/ Scandale, W (CERN) ; Arduini, G (CERN) ; Cerutti, F (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Montesano, S (CERN) ; Petrucci, S (CERN) ; Redaelli, S (CERN) et al.
This paper is devoted to an experimental study of focusing and defocusing positively charged particle beams with the help of specially bent single crystals. Four crystals have been fabricated for this purpose. [...]
2018 - 11 p.
- Published in : Phys. Rev. Accel. Beams 21 (2018) 014702
Fulltext: PDF;
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2018-10-16
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2018-10-16
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Measurements and FLUKA simulations of bismuth and aluminium activation at the CERN Shielding Benchmark Facility (CSBF)
/ Iliopoulou, E (CERN ; Aristotle U., Thessaloniki) ; Bamidis, P (Aristotle U., Thessaloniki) ; Brugger, M (CERN) ; Froeschl, R (CERN) ; Infantino, A (CERN) ; Kajimoto, T (Hiroshima U. (main)) ; Nakao, N (Shimizu, Tokyo) ; Roesler, S (CERN) ; Sanami, T (KEK, Tsukuba) ; Siountas, A (Aristotle U., Thessaloniki)
The CERN High Energy AcceleRator Mixed field facility (CHARM) is located in the CERN Proton Synchrotron (PS) East Experimental Area. The facility receives a pulsed proton beam from the CERN PS with a beam momentum of 24 GeV/c with $5 \cdot 10^{11}$ protons per pulse with a pulse length of 350 ms and with a maximum average beam intensity of $6.7 \cdot 10^{10}$ p/s that then impacts on the CHARM target. [...]
2018 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 885 (2018) 79-85
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