No abstract available

No abstract available

[en] The author introduces the method and the result about the measurement of high frequency D-voltage with the Bremsstrahlung spectrum. This method avoids the effect of the frequency, magnetic field and the distributing parameter

[en] This paper describes power matching of the 200 kW generator and RF cavity of HIRFL Injector RF system, working principle of matching measure system as well as matching system improvement and perfecting. It further calculates the input impedance and coupling capacitor of the RF cavity. In order to enhance the reliability and stability in RF system, the problem of D voltage-enhancement and RF power transmission, etc are researched in depth. The vector impedance meter is used to measure the cavity matching impedance and the vector voltage to dynamically measure the phasing errors of the power output, then that the D circuit is working at the matching stage can be ensured. With the D voltage of SFC raising from 50-65 kV (unstable) to 105 kV (stable), SFCs high efficiency is guaranteed. (authors)

[en] The paper introduces the calculation and measurement method of Q factor which describes the performance of cyclotron's RF D circuit. It mainly introduces the formula and principle for calculating the Q factor. The calculation data are compared with the measurement data of the capacitor coupling method, which shows good accordance with small errors. Analysis suggests that errors are mainly caused by approximate computation and the value of contacted resistance adopted. As contacted resistance is an important factor, more attention should be paid on it in designing cavities. (authors)

[en] The development and debugging on the wide-band RF power supply of RFQ1L, one of the most important sections of the SHANS, were introduced. The result shows that the performance of the power supply matches the requirements. Its frequency can be regulated consecutively from 40 kHz up to 1000 kHz, and the phase difference between the two outputs and the output voltages can satisfy the commissioning of the RFQ1L. (authors)