Microwave cold test debug of an S-Band 2 MeV on-axis coupling SW accelerator

This paper presents the model cavity tune and cold test of an S-band 2 MeV on-axis coupling SW accelerator. The measurement of the model cavity's frequency, degree of coupling, Q value and on-axis field distribution are described in detal. In addition, the results of caving tune and cold test of accelerating tube are given. The frequency consistency of the accelerator is within ±0.3 MHz, the coupling degree in the supersaturation state 1.14, the quality factor of the accelerator 12000±200, and the field distribution ratio 1:2.2:2. All the results observed show that the accelerator satisfies the physics design with microwave debugging. (authors)