  A storage ring provides an attractive option for directly measuring the
electric dipole moment~(EDM) of charged particles. To reach a sensitivity of
10^-29 e x cm, it is critical to mitigate the systematic errors from all
sources. This daunting task is pushing the precision frontier of accelerator
science and technology beyond its current state of the art. Here, we present a
unique idea of a magnetic dipole moment~(MDM) spin transparent quadrupole that
can significantly reduce the systematic errors due to the transverse electric
and magnetic fields that particle encounters.
