CERN Accelerating science

Published Articles

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2018-11-15
06:18
Pseudospin Symmetry and Microscopic Origin of Shape Coexistence in the $^{78}$Ni Region: A Hint from Lifetime Measurements / Delafosse, C (Orsay, IPN) ; Verney, D (Orsay, IPN) ; Marević, P (Orsay, IPN ; CEA DAM) ; Gottardo, A (Orsay, IPN) ; Michelagnoli, C (GANIL) ; Lemasson, A (GANIL) ; Goasduff, A (INFN, Legnaro) ; Ljungvall, J (CSNSM, Orsay) ; Clément, E (GANIL) ; Korichi, A (CSNSM, Orsay) et al.
Lifetime measurements of excited states of the light $N=52$ isotones $^{88}$Kr, $^{86}$Se, and $^{84}$Ge have been performed, using the recoil distance Doppler shift method and VAMOS and AGATA spectrometers for particle identification and gamma spectroscopy, respectively. The reduced electric quadrupole transition probabilities $B(E2;2^+ \rightarrow 0^+)$ and $B(E2;4^+ \rightarrow 2^+)$ were obtained for the first time for the hard-to-reach $^{84}$Ge. [...]
2018 - 7 p. - Published in : Phys. Rev. Lett. 121 (2018) 192502 Fulltext: PDF;

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2018-11-15
06:18
Exploratory Study of X-band Klystron Designs for Maximum Efficiency / Weatherford, Brandon (SLAC) ; Kowalczyk, Richard (SLAC) ; Dolgashev, Valery (SLAC) ; Neilson, Jeffrey (SLAC) ; Jensen, Aaron (Unlisted, US, MA) ; Syratchev, Igor (CERN) ; Cai, Jinchi (CERN)
Results are reported from an exploratory study of high efficiency X-band klystron designs. A variety of simulation tools are used to determine the peak achievable efficiency as a function of beam and circuit parameters. [...]
2018 - 2 p. - Published in : 10.1109/IVEC.2018.8391533

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2018-11-15
06:18
Exchange-Based Diffusion in Hb-Graphs: Highlighting Complex Relationships / Ouvrard, Xavier (U. Geneva (main) ; CERN) ; Le Goff, Jean-Marie (CERN) ; Marchand-Maillet, Stéphane (U. Geneva (main))
Most networks tend to show complex and multiple relationships between entities. Networks are usually modeled by graphs or hypergraphs; nonetheless a given entity can occur many times in a relationship: this brings the need to deal with multisets instead of sets or simple edges. [...]
2018 - 6 p. - Published in : 10.1109/CBMI.2018.8516525

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2018-11-15
06:17
Beam-loading effect on breakdown rate in high-gradient accelerating cavities: An experiment at the Compact Linear Collider Test Facility at CERN / Senes, Eugenio (Oxford U. ; CERN) ; Argyropoulos, Theodoros (Valencia U., IFIC ; CERN) ; Tecker, Frank (CERN) ; Wuensch, Walter (CERN)
Radio frequency breakdown rate is a crucial performance parameter that ensures that the design luminosity is achieved in the CLIC linear collider. The required low breakdown rate for CLIC, of the order of 10$^{-7}$  breakdown pulse${-1}$ m${-1}$, has been demonstrated in a number of 12 GHz CLIC prototype structures at gradients in excess of the design 100  MV/m accelerating gradient, however without the presence of the accelerated beam and associated beam loading. [...]
2018 - 8 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 102001 Fulltext: PDF;

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2018-11-15
06:17
Refining and testing 12,000 km of scintillating plastic fibre for the LHCb SciFi tracker / Cavalcante, A B R (Rio de Janeiro, CBPF) ; Dey, B (CCNU, Wuhan, Inst. Part. Phys.) ; Gavardi, L (Tech. U., Dortmund (main)) ; Gruber, L (CERN) ; Joram, C (CERN) ; Kristic, R (CERN) ; Shinji, O (Kuraray, Tokyo) ; Zhukov, V (RWTH Aachen U.)
The LHCb Collaboration is constructing a large scintillating fibre tracker for a major upgrade of the experiment during the LHC long shutdown LS2 scheduled for 2019–2020. The detector is based on blue emitting Kuraray SCSF-78MJ fibres of 0.25 mm diameter, read out by linear 128-channel Hamamatsu SiPM arrays. [...]
2018 - 23 p. - Published in : JINST 13 (2018) P10025 Fulltext: PDF;

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2018-11-14
11:11
J-PET’s plastic revolution / Czerwiński, Eryk
A recently developed detector based on inexpensive plastic scintillators paves the way for whole-body PET imaging and precision measurements of fundamental symmetries..
Published in: CERN Courier Volume 58, Number 9, November 2018
Geneva : CERN, 2018

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2018-11-14
11:11
Astrowatch
Published in: CERN Courier Volume 58, Number 9, November 2018
Geneva : CERN, 2018

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2018-11-14
11:11
Recruitment
Published in: CERN Courier Volume 58, Number 9, November 2018
Geneva : CERN, 2018

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2018-11-14
11:11
News
Published in: CERN Courier Volume 58, Number 9, November 2018
Geneva : CERN, 2018

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2018-11-14
11:11
Archive
Published in: CERN Courier Volume 58, Number 9, November 2018
Geneva : CERN, 2018

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