For the beam transport system in storage ring, linear coupling is mainly caused by skew quadrupole and longitudinal solenoid field.
在储存环的束流传输系统中,斜四极场和纵向螺线管场是引起束流线性耦合的主要原因。
By using betatron motion of single particle in the presence of skew quadrupole and longitudinal solenoid field, the effect of the beam linear coupling is preliminarily investigated. Beam emittance variation due to skew quadrupole is obtained too.