Accelerator Seminar: Valery Shemelin

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  • Accelerator Seminar: Valery Shemelin
    https://jlab-org.zoomgov.com/j/16121109706?pwd=dUhFdHVDdkY1SGYzMldneVpkYVJTQT09
    CC F326-327
    2023-09-14EDT11:00:00 ~ 2023-09-14EDT12:00:00
    19912
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Speaker: Valery Shemelin, Cornell University

Title: Optimization of Superconducting Cavities: Shape, Fields, Multipactor

Abstract: A method is discussed to search geometrical parameters of elliptical cavities to obtain the best possible figures of merit: B_pk/E_acc (peak magnetic field) and GR/Q (losses) for a given E_pk/E_acc (peak electric field), aperture, wall slope angle. The result of this search is the reentrant cavity with a record acceleration rate of 59 MeV/m with the aperture radius of 30 mm and 52 MeV/m with 35 mm. Further improvement in optimization is offered – equidistant optimization, that makes clear the dependence of maximal acceleration gradient on the limiting electric and magnetic field. Use of specially developed software – TunedCell on the base of SuperLANS - made possible to find best geometries of cavities in a 4D space of parameters.An overview of different multipactor kinds is presented, zones of 1-point and 2-point multipactor in elliptical cavities are described, and a method to search for multipactor–free geometries is offered.

https://www.jlab.org/accelerator/seminars

Event Date
-
Location
CC F326-327
Category
Conferences
Scientific Program
Seminars
Contact Name
Dennis Turner
Phone
(757) 269-7100