Desicn and status of an experimental superconducting linear accelerator for electrons

Analysis of RF losses and material characterization of samples removed from a Nb3Sn-coated superconducting RF cavity

“…This temperature map shows that the heating on the surface is not uniform, with some distributed areas, e.g. at (35,7), showing more heating than others, e.g. (29,7).…”

“…Each board has 16 temperature sensors mounted on spring-loaded pins that push against the outer surface of the cavity. The temperature difference between the outer cavity surface and the Helium bath at the highest gradient showed three regions with the strongest heating on the cavity surface at (15, 3), (7,8), and (2,7). The X-axis and Y-axis here represent board number and sensor number respectively.…”

“…The number next to the marked areas indicated the number assigned to the extracted sample. This temperature map shows that the heating on the surface is not uniform, with some distributed areas, e.g., at (35,7), showing more heating than others, e.g., (29,7). This temperature map was sectioned into areas with different heating behavior to guide extraction of characteristic samples from different surface areas.…”

“…at (35,7), showing more heating than others, e.g. (29,7). This temperature map was sectioned into areas with different heating behavior to guide extraction of characteristic samples from different surface areas.…”

“…The research into potential applications of this compound started almost from its discovery by Bernd Matthias in 1954 [2]. Its application to the superconducting RF field was also pursued by several groups around the world [3][4][5][6][7][8][9][10]. In the course of these R&D efforts, many elliptical single-cell cavities have been coated and tested.…”