[Cuga] End of Year Luncheon Seminar - Wednesday, December 19, 2012 - A message from Hari Areti

[Jodi Patient]

Jefferson Lab's Graduate Student and Post-Doc Association Wiki:
  https://gspda.jlab.org/wiki/index.php/Main_Page

            Please RSVP to: patient at jlab.org by COB on December 18, 2012.

                Wednesday, December 19, 2012
                                    
                        ***CC F113***
                                    
                        12:00-1:00 pm

        "Recent Activities in SRF R&D at Jefferson Lab"

                 Pashupati Dhakal, SRF R&D

                        Jefferson Lab


Abstract:

Niobium is the material of choice for the fabrication of the superconducting radiofrequency (SRF) cavities used in particle accelerators. In the last four decades, much work has been done to push the performance of SRF cavity to its theoretical limits of the accelerating gradient and high quality factor. One of the issues towards achieving those limits is the high residual loss and occurrence of a sharp increase of the RF losses (decrease in quality factor) when the peak magnetic field reaches about 100 mT, consequently limiting the operational accelerating gradient of SRF cavities. In this talk, I will review the superconductivity history, theory and present the recent results on material characterization and the single cell cavity results at Jefferson lab as a part of SRF R&D activities which are currently underway.