Fig. 1. HUST injector (a) Schematic diagram, (b) Physical photograph

Fig. 2. Structural diagram of ITC preinjector

Fig. 3. Longitudinal phase space evolution in ITC preinjector (a) Numerical method, (b) Analytical method

Fig. 4. Evolution of drift performance of the preinjector output (a) Without accelerator, (b) With accelerator

Fig. 5. Errors of bunch length measurement using RF phase shift method and its compensation results

Fig. 6. Experimentally measured S₁₁ curve and cavity loss as a function of frequency

Fig. 7. Stabilities of microwave system stability before and after LLRF system is connected (a) Amplitude jitter, (b) Phase jitter

Fig. 8. RF power waveform during breakdown (color online)