Horizontal Test for BEPCII 500MHz Spare Cavity

The horizontal test for BEPCII 500MHz spare cavity has been completed in IHEP. The max voltage of the cavity is 2.17MV, Q0 is 5.78\times108.This paper mainly reports coupler aging parameters before the horizontal test, as well as the parameters during cool-down the change of frequency, loaded Q, vacuum and the deformation of the cavity with temperature. And the test results were analyzed.