IPAC'24 - 15th International Particle Accelerator Conference

Investigation of hot-spot and quench location due to trapped flux in niobium superconducting radiofrequency cavities

WEPS34

22 May 2024, 16:00

2h

Blues (MCC Exhibit Hall A)

Poster Presentation MC7.T07 Superconducting RF Wednesday Poster Session

Speaker

Bashu Khanal (Old Dominion University)

Description

One of the significant sources of residual losses in superconducting radio-frequency cavities is magnetic flux trapped during the cool-down due to the incomplete Messier effect. If the trapped vortices are non-uniformly distributed on the cavity surface, the temperature mapping revealed the “hot-spots” at the location of high density of pinned vortices. In this contribution, we present the results of combined temperature and magnetic mapping measurements on a single cell 3.0 GHz and 1.3 GHz niobium single-cell cavities. The results show the direct evidence of pinned vortices induced “hot-spots”.

Funding Agency

The work is partially supported by the U.S. DOE, Office of science, Office of High Energy Physics under Awards No. DE-SC 0009960. This manuscript has been authored by Jefferson Science Associates, L