NAPAC 2019 SPC June 14 2019 Contributed orals

NAPAC 2019 SPC – June 14, 2019 Contributed orals from MC 7 Bob Laxdal, Peter Ostroumov 71 proposals, first ranking using SPMS priority system 25 proposals receive at least one supporter Ranked by score priority 1=2 points, priority 2=1 point Choose top 12

Tor’s targets Possible allocation of MC's and invited / contributed Contrib. abstracts Invited hrs Talks Contributed Talks 23 MC 1 4 4 8 MC 2 6 6 12 62 MC 3 4 4 8 43 MC 4 4 4 8 30 MC 5 5 5 10 74 MC 6 5. 5 5 12 45 MC 7 6 6 12 71 MC 8 3. 5 3 8 9 total 38 37 78 357

MC 7 Invited Within 180 minutes = FRIB(2), CERN, ORNL, Radiabeam, FNAL [3 female presenters]

10 Male, 2 female – raised talk 1995 due to 2119 votes (2) (similar FRIB paper) - 2142 ->reclassified

Experimental Demonstration of a Fast Reactive Ferroelectric Based Tuner for SRF CW Applications. A. Kanareykin Euclid Techlabs LLC in collaboration with CERN, FNAL and BNL. Euclid Techlabs in collaboration with FNAL and BNL has designed and assembled the fast (< 1 us range) tuner based on BST(M) ferroelectric elements (ε~150). In a world first, CERN has tested the prototype Fast Reactive Tuner (FRT) with a 400 MHz superconducting cavity, and frequency tuning has been successfully demonstrated, which will allow electronic control of cavity frequencies, by a device operating at room temperature, within timescales that will allow active compensation of SRF cavity microphonics. A new concepts of a phase shifter based on low dielectric constant ferroelectric elements, fabrication technology and CERN experimental results will be presented. Specific features of technologies and challenges of the designs of the projects mentioned above are high magnitude and phase stability of its operations. Mechanical vibrations, or microphonics affect the SRF resonator, while the ferroelectric tuners have shown extremely high tuning speed. For many applications this type of tuner would eliminate the need to design over-coupled fundamental power couplers, thus significantly reducing RF amplifier power for CW SRF based accelerators. Bob’s comment: Euclid already has one contributed oral in this session – this abstract is a little too `abstract’ and sales brochure style – not clear of the advantage over piezo active compensation – better for poster