A Superconducting Radio-Frequency Cavity Thermal and Quality-Factor Budget: Surface Resistance, Cryogenic Load and Cryoplant Power

This paper presents a computed design for a superconducting cavity intended for superconducting radio-frequency systems, with its performance, resource budgets and margins derived from stated assumptions rather than asserted. The headline results are: bCS surface resistance at 2 K and 1.3 GHz of 24.6 nano-ohm; total surface resistance including the residual term of 29.6 nano-ohm; unloaded quality factor of 9.12e+09 dimensionless; dynamic cryogenic load per cavity at the stated gradient of 71.3 W; total 2 K load per cavity including static allowance of 72.5 W. Each figure was produced by the deposited computation from the inputs listed in the Methods, and the sensitivity of the conclusions to those inputs is examined in the Discussion. The design is a paper study: it is labelled, on its face and in this abstract, SIMULATED, NOT MEASURED, and no quantity reported here is a measurement of built hardware.