STATUS OF NIOWAVE / ROARK ILC VENDOR QUALIFICATION TESTS AT CORNELL

To build the ~14,000 cavities required for the ILC each of the three world regions must have a sizable industrial base of qualified companies to draw cavities from. Two of these companies, Niowave Inc. and C.F. Roark Welding & Engineering Co., Inc, recently manufactured six 1.3 GHz single-cell cavities for qualification purposes. All six cavities achieved gradients above 25 MV/m before they were limited by the available RF power (Q-slope) or quenched. This paper will report the results of cold tests for all six cavities and on the causes of quench determined by 2 sound detection and optical inspection.