2022-05-27
17:44 |
Direct evidence of Be as an amphoteric dopant in GaN
/ Wahl, U. ; Correia, J. G. ; Costa, A. R. G. ; Lima, T. A. L. ; Moens, J. ; Kappers, M. J. ; da Silva, M. R. ; Pereira, L. M. C. ; Vantomme, A.
/IS634 Collaboration
The interest in Be as an impurity in GaN stems from the challenge to understand why GaN can be doped p type with Mg, while this does not work for Be. While theory has actually predicted an acceptor level for Be that is shallower than Mg, it was also argued that Be is not a suitable acceptor because its am-photeric nature, i.e. [...]
- Published in : Physical Review B105 (2022) 184112
Postprint from Phys. Rev. B 105 (2022) 184112: PDF; Supplemental Material from Phys. Rev. B 105 (2022) 184114: PDF;
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2022-05-26
04:43 |
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2022-05-26
04:02 |
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2022-05-24
06:41 |
Design of a Very Low Energy Beamline for NA61/SHINE
/ Mussolini, Carlo Alberto (CERN ; JAI, UK) ; Burrows, Philip N (JAI, UK) ; Charitonidis, Nikolaos (CERN) ; Nagai, Yoshikazu (U. Colorado, Boulder) ; Zimmerman, Eric D (U. Colorado, Boulder)
A new, low-energy beamline branch is currently under consideration for the H₂ beamline at the CERN North Area. This new branch would extend the capabilities of the current infrastructure enabling the study of particles in the very low, 1-13 GeV/c, momentum range. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 4017-4020
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.4017-4020
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2022-05-24
06:41 |
The Consolidation of the CERN Beam Interlock System
/ Johnson, Roland (CERN) ; Martin, Christophe (CERN) ; Podzorny, Tomasz (CERN) ; Romera, Iván (CERN) ; Secondo, Raffaello (CERN) ; Uythoven, Jan (CERN)
The Beam Interlock System (BIS) is a machine protection system that provides essential interlock control throughout the CERN accelerator complex. The current BIS has been in service since 2006; as such, it is approaching the end of its operational lifetime, with most components being obsolete. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC '21 (2021) 3309-3312
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3309-3312
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2022-05-24
06:41 |
Detection and Classification of Collective Beam Behaviour in the LHC
/ Coyle, Loic (Ecole Polytechnique, Lausanne ; CERN) ; Blanc, Frederic (Ecole Polytechnique, Lausanne) ; Buffat, Xavier (CERN) ; Krymova, Ekaterina (Ecole Polytechnique, Lausanne ; Zurich, ETH) ; Obozinski, Guillaume (Ecole Polytechnique, Lausanne ; Zurich, ETH) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne ; CERN) ; Schenk, Michael (Ecole Polytechnique, Lausanne ; CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Wenninger, Jorg (CERN)
Collective instabilities can lead to a severe deterioration of beam quality, in terms of reduced beam intensity and increased beam emittance, and consequently a reduction of the collider’s luminosity. It is therefore crucial for the operation of the CERN’s Large Hadron Collider to understand the conditions in which they appear in order to find appropriate mitigation measures. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 4318-4321
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.4318-4321
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2022-05-24
06:41 |
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2022-05-24
06:41 |
Beam Induced Power Deposition in CERN SPS Injection Kickers
/ Barnes, Michael J (CERN) ; Bjorkqvist, Oskar (CERN) ; Kodama, Kota (CERN ; KEK, Tsukuba)
The SPS injection kicker magnets (MKP) were developed in the 1970’s, before beam power deposition was considered an issue and before any advanced tools for analysing beam coupling impedance were available in their current form. These magnets are very lossy from a beam impedance perspective, and the beam induced power deposition is highly non-uniform. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 3490-3493
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3490-3493
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2022-05-23
10:35 |
Quantum gravity phenomenology at the dawn of the multi-messenger era—A review
/ Addazi, A. (SCU, Chengdu ; Frascati) ; Alvarez-Muniz, J. (Santiago de Compostela U., IGFAE) ; Alves Batista, R. (Madrid, IFT) ; Amelino-Camelia, G. (Naples U. ; INFN, Naples) ; Antonelli, V. (Milan U. ; INFN, Milan) ; Arzano, M. (Naples U. ; INFN, Naples) ; Asorey, M. (Zaragoza U.) ; Atteia, J.-L. (IRAP, Toulouse) ; Bahamonde, S. (Tartu, Inst. Phys. ; Tokyo Inst. Tech.) ; Bajardi, F. (Naples U.) et al.
The exploration of the universe has recently entered a new era thanks to the multi-messenger paradigm, characterized by a continuous increase in the quantity and quality of experimental data that is obtained by the detection of the various cosmic messengers (photons, neutrinos, cosmic rays and gravitational waves) from numerous origins. They give us information about their sources in the universe and the properties of the intergalactic medium. [...]
arXiv:2111.05659.-
2022-07 - 119 p.
Fulltext: PDF;
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2022-05-21
06:07 |
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