Open AccessPosted Content
Conceptual Design Report -- eSPS
M. Aicheler,Torsten Åkesson,Fanouria Antoniou,A. Arnalich,P. A. Arrutia Sota,P. Bettencourt Moniz Cabral,D. Bozzini,Markus Brugger,O Brunner,P. N. Burrows,Rama Calaga,M. J. Capstick,Roberto Corsini,S. Doebert,L. A. Dougherty,Yann Dutheil,L. A. Dyks,O. Etisken,L. Evans,A. Farricker,R. Fernandez Ortega,M. A. Fraser,J. Gall,S. J. Gessner,Brennan Goddard,J.-L. Grenard,A. Grudiev,Edda Gschwendtner,J. Gulley,L. Jensen,Roger Jones,M. A.C. Lamont,Andrea Latina,Thibaut Lefèvre,R. Lopes,H. Mainaud Durand,S. Marsh,G. Mcmonagle,Eric Montesinos,R. Morton,P. Muggli,A. Navascues Cornago,M. Nonis,John Osborne,Yannis Papaphilippou,A. Rossi,C. Rossi,I. Ruehl,S. Schadegg,E. Shaposhnikova,Daniel Schulte,Steinar Stapnes,M. Widorski,O. E. Williams,W. Wuensch +54 more
Reads0
Chats0
TLDR
The design of a primary electron beam facility at CERN is described in this paper, which re-enables the SPS as an electron accelerator, and leverages the development invested in CLIC technology for its injector and as accelerator R&D infrastructure.Abstract:
The design of a primary electron beam facility at CERN is described. It re-enables the SPS as an electron accelerator, and leverages the development invested in CLIC technology for its injector and as accelerator R&D infrastructure. The facility would be relevant for several of the key priorities in the 2020 update of the European Strategy for Particle Physics, such as an e+e- Higgs factory, accelerator R&D, dark sector physics, and neutrino physics. In addition, it could serve experiments in nuclear physics. The electron beam delivered by this facility would provide access to light dark matter production significantly beyond the targets predicted by a thermal dark matter origin, and for natures of dark matter particles that are not accessible by direct detection experiments. It would also enable electro-nuclear measurements crucial for precise modelling the energy dependence of neutrino-nucleus interactions, which is needed to precisely measure neutrino oscillations as a function of energy. The implementation of the facility is the natural next step in the development of X-band high-gradient acceleration technology, a key technology for compact and cost-effective electron/positron linacs. It would also become the only facility with multi-GeV drive bunches and truly independent electron witness bunches for plasma wakefield acceleration. The facility would be used for the development and studies of a large number of components and phenomena for a future e+e- Higgs and electroweak factory as the first stage of a next circular collider at CERN, and its cavities in the SPS would be the same type as foreseen for such a future collider. The operation of the SPS with electrons would train a new generation of CERN staff on circular electron accelerators. The facility could be made operational in about five years and would operate in parallel and without interference with Run 4 at the LHC.read more
Citations
More filters
Nuclear Instruments and Methods
TL;DR: In this paper, the thermal and epithermal self-shielding factors in different materials (Al, Au, Cd, Co, Cu, Eu, Gd, In, Ir, Mo, Ni, Pt, Pb, Rh, Sc, Sm and Ta) and different geometries (foils, wires, spheres and) have been calculated using the MCNP code.
Journal Article
Current dark matter annihilation constraints from CMB and low-redshift data
TL;DR: Stony Brook University-Brookhaven National Laboratory (Research Initiatives Seed Grant 37298, Project 1111593) as discussed by the authors proposed a seed-grant-based seed selection strategy.
Non-invasive Beam Diagnostics with Cherenkov Diffraction Radiation
Thibaut Lefèvre,Laurel Bartnik,Michele Bergamaschi,Michael Billing,V. V. Bleko,Lorraine Bobb,Yadira Bordlemay Padilla,Joseph Conway,M. J. Forster,Owain Rhodri Jones,Pavel Karataev,Robert Kieffer,Anatoly Konkov,K. Lekomtsev,Julia Markova,Stefano Mazzoni,A. P. Potylitsyn,James Shanks,Suntao Wang +18 more
TL;DR: In this article, the authors present a concept for the centering of charged particle beams when passing close to dielectric material, based on recent measurements of incoherent Cherenkov Diffraction Radiation (ChDR) performed on the Cornell Electron Storage Ring.
Dark Current Analysis at CERN’s X-band Facility
David Banon-Caballero,M. Boronat,Nuria Catalán Lasheras,Angeles Faus-Golfe,Benito Gimeno,T.G. Lucas,William Millar,Jan Paszkiewicz,Sam Pitman,Victoria Sánchez Sebastián,Anna Vnuchenko,M. Volpi,Markus Widorski,Walter Wuensch,Veronica del Pozo Romano +14 more
TL;DR: In this article, an analysis of dark current is presented for four accelerating structures that were tested and conditioned in CERN's X-band test facility for CLIC, and the dependence on power, and therefore on accelerating gradient, of the dark current signals is presented.
Pre-Alignment Techniques Developments and Measurement Results of the Electromagnetic Center of Warm High-Gradient Accelerating Structures
TL;DR: In this paper, the PACMAN project has developed a test set-up to measure the electromagnetic center of high gradient accelerating structures for alignment purposes, with a final precision of 1.09 μm in the horizontal plane and 0.58 μm on the vertical plane.
References
More filters
Journal ArticleDOI
The FLUKA Code: Developments and Challenges for High Energy and Medical Applications
T. T. Bohlen,F. Cerutti,M. P. W. Chin,Alberto Fasso,A. Ferrari,Pablo G. Ortega,Andrea Mairani,Paola Sala,George Smirnov,V. Vlachoudis +9 more
TL;DR: The FLUKA Monte Carlo code as discussed by the authors is used extensively at CERN for all beam-machine interactions, radioprotection calculations and facility design of forthcoming projects, which requires the code to be consistently reliable over the entire energy range (from MeV to TeV) for all projectiles.
Book
Physics Of Collective Beam Instabilities In High Energy Accelerators
TL;DR: Wake Fields and Impedances. Landau Damping and Perturbation Formalism. as discussed by the authors Theoretical analysis of linear accelerators. But they do not consider the effects of linear acceleration on linear models.
Journal ArticleDOI
Cosmological lower bound on heavy-neutrino masses
Benjamin W. Lee,Steven Weinberg +1 more
TL;DR: The present cosmic mass density of possible stable neutral heavy leptons is calculated in a standard cosmological model as mentioned in this paper, in order for this density not to exceed the upper limit of 2\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}29}$ g/${\mathrm{cm}}^{3}$, the lepton mass would have to be greater than a lower bound of the order of 2 GeV.
Journal ArticleDOI
Secluded WIMP Dark Matter
TL;DR: In this article, a generic mechanism via which thermal relic WIMP dark matter may be decoupled from the Standard Model, namely through a combination of WIMPs annihilation to metastable mediators with subsequent delayed decay to Standard Model states, is considered.
Journal ArticleDOI
An absorption profile centred at 78 megahertz in the sky-averaged spectrum
Judd D. Bowman,Alan E. E. Rogers,Raul A. Monsalve,Raul A. Monsalve,Raul A. Monsalve,Thomas J. Mozdzen,Nivedita Mahesh +6 more
TL;DR: The detection of a flattened absorption profile in the sky-averaged radio spectrum that is largely consistent with expectations for the 21-centimetre signal induced by early stars; however, the best-fitting amplitude of the profile is more than a factor of two greater than the largest predictions.