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X-ORIGINAL-URL:https://w3.lnf.infn.it
X-WR-CALDESC:Eventi per INFN-LNF
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DTSTART:20180325T010000
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DTSTART:20181028T010000
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DTSTART;TZID=Europe/Rome:20181203T143000
DTEND;TZID=Europe/Rome:20181203T163000
DTSTAMP:20260911T033155
CREATED:20181121T184729Z
LAST-MODIFIED:20181210T184744Z
UID:13903-1543847400-1543854600@w3.lnf.infn.it
SUMMARY:B-Physics Anomalies\, Lepton Universality Violation and… Cosmology
DESCRIPTION:A whole body of B-meson decays display persistent deviations with respect to the Standard-Model (SM) predictions. These deviations concern coherent sets of data\, all of them with two leptons in the final state. Deviations are in the fact that decays to different leptons appear to depart or not from the SM predictions depending on the considered lepton. This can be explained by some new interaction that distinguishes between the lepton species\, i.e. one that violates Lepton Universality (LU). After a review of the status and interpretation of data\, we explore the question whether models for such beyond-SM effect may leave footprints in the cosmos\, e.g. in observables related to Dark Matter or to neutrino fluxes.
URL:/event/b-physics-anomalies-lepton-universality-violation-and-cosmology/
LOCATION:Aula Seminari\, Via Enrico Fermi\, 40\, Frascati\, Roma\, 00044\, Italia
CATEGORIES:Seminari teorici
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DTSTART;TZID=Europe/Rome:20181203T143000
DTEND;TZID=Europe/Rome:20181203T160000
DTSTAMP:20260911T033155
CREATED:20181130T140044Z
LAST-MODIFIED:20240513T100831Z
UID:14041-1543847400-1543852800@w3.lnf.infn.it
SUMMARY:The VHF-Gun Electron\, an electron source optimized for high-brightness\, high-duty-cycle applications.
DESCRIPTION:In the last decade\, the development/proposal of MHz-class repetition rate electron applications such as free electron lasers (FELs)\, inverse Compton scattering sources\, and ultrafast electron diffraction and microscopy (UED/UEM)\, called for the development of new gun schemes capable of generating high brightness beams at such high rates. The VHF-Gun\, a 186 MHz room-temperature continuous wave RF photo-gun developed at the Lawrence Berkeley Laboratory (LBNL) was one of the answers to that call. The VHF-Gun was constructed and tested in the APEX facility at LBNL successfully demonstrating all design parameters and the generation of electron beams with the required brightness. A close version of the APEX VHF-Gun was fabricated at LBNL and delivered to SLAC to operate as the electron source for the LCLS-II\, the new X-ray FEL in construction at Stanford\, and the original VHF-Gun is presently used for generating the beams for HiRES\, the UED program at LBNL.\nBut the game it is not over yet!  For example\, the recently approved upgrade of the LCLS-II towards higher energies (LCLS-II HE)\, and the always brightness-starving UED and UEM applications\, would greatly benefit from a further increase of the electron beam brightness. In response to that\, our group at LBNL started to study possible upgrades of the VHF-Gun scheme that would allow for the desired performance improvement. Several conceptual options were identified and last year\, we received funds for developing such concepts up to a more mature level.\nAfter a description of the existing VHF-Gun and of its main experimental results\, the upgrade options under consideration are presented.
URL:/event/the-vhf-gun-electron-an-electron-source-optimized-for-high-brightness-high-duty-cycle-applications/
LOCATION:Aula Salvini
CATEGORIES:Seminari Divisione Acceleratori
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