Patent ID: 11958089
Assignee: JEFFERSON SCIENCE ASSOCIATES, LLC
Field: Chemical engineering (Chemistry)
Classification: CPC B  H  Y | IPC B  H

Claim 14:
15. A method for removing microscopic contaminant particles from the inner surface of an SRF accelerator cavity or string of cavities having a central axis, said method comprising:
a rotating lance;
a liquid nitrogen supply tank;
a cleaning head on said lance, said cleaning head including one or more nozzles;
a hollow bore within said lance and said cleaning head;
a mechanism for advancing and retracting the position of the lance within the accelerator cavity;
pumping the liquid nitrogen to high pressure;
conveying the high pressure liquid nitrogen into the hollow bore, the lance, and the cleaning head; and
streaming a high pressure liquid nitrogen jet out of the one or more nozzles and against the inner surface of the SRF accelerator cavity or string of cavities to dislodge microscopic contaminant particles from said inner surface, said liquid nitrogen converting to gaseous nitrogen after said streaming and collision with said inner surface of the SRF accelerator cavity or string of cavities.