X-Y coupling generation with AC/pulsed skew quadrupole and its application

The new method of x-y coupling generation with AC or pulsed skew quadrupole is proposed. With this method, no difference resonance is requested; therefore the horizontal and vertical tunes should not be the same value. The AC skew quadrupole is driven by the difference frequency of horizontal and vertical betatron frequency to convert the horizontal position frequency to the vertical kick frequency and vice versa, therefore the coupling with this method is on resonance and can be driven to full coupling strength. In this report, the principle, simulation result, and possible applications are descried. (author)