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Accelerator Seminars

Accelerator Seminar Committee:
  Chair: Joe Grames / Past Chair: Anne-Marie Valente

    Members: Carlos Hernandez- Garcia, Gianluigi Ciovati, Vasiliy Morozov and
Steve Benson

 Accelerator Seminars will be scheduled weekly on Thursdays from 11:00 a.m. - 12:00 p.m.
If you would like to schedule a seminar, please contact Joe Grames for approval.


DATE: November 18, 2015

TITLE: Solid State Modulators by SandiNova Systems

SPEAKER: Douglas Eaton, ScandiNova Systems

TIME: 11:00 a.m.

LOCATION: CEBAF Center, Room F113

ABSTRACT:ScandiNova Systems is a worldwide supplier of solid state modulators used by research, medical and industrial customers around the world. Our unique design provides for many common building blocks to be used for powering pulsed loads ranging from small electron guns up to 100 MW klystron tubes. These modulators do not use stacked power electronics to generate the high voltages necessary to drive the load, rather a patented split core transformer with multiple single turn primaries provide isolation between the high power electronics and the load. Our unequalled power supplies coupled with our precise electronics give consistent pulsed RF outputs from klystrons with better than 100 ppm repeatability.


DATE: December 8, 2015

TITLE: High Gradient SRF Cavity R&D at DESY

SPEAKER: Aliaksandr Navitski, DESY

TIME: 11:00 a.m.

LOCATION: To be announced

ABSTRACT:The European X-ray Free Electron Laser (EXFEL), currently under construction in Hamburg, requires the production of more than 800 TESLA-shape nine-cell 1.3 GHz SRF niobium cavities and provides a great opportunity to learn and improve the industrial production of high gradient cavities as well as to elaborate the modules assembly technique. In order to understand and optimise the basic processes limiting the maximum achievable gradients and efficiency of the superconducting cavities, varying inspection and repair techniques such as optical and replica surface studies, 2nd sound quench localisation  temperature mapping, local grinding etc. have been applied. Optical inspection of around 100 EXFEL series cavities has been performed recently using high-resolution OBACHT system. The detailed results of this SRF R&D program will be presented and discussed.



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