  A current sheet (CS) is the central structure in the disrupting magnetic
configuration during solar eruptions. More than 90\% of the free magnetic
energy (the difference between the energy in the non-potential magnetic field
and that in the potential one) stored in the coronal magnetic field beforehand
is converted into heating and kinetic energy of the plasma, as well as
accelerating charged particles, by magnetic reconnection occurring in the CS.
However, the detailed physical properties and fine structures of the CS are
still unknown since there is no relevant information obtained via in situ
detections. The Parker Solar Probe (PSP) may provide us such information should
it traverse a CS in the eruption. The perihelion of PSP's final orbit is
located at about 10 solar radii from the center of the Sun, so it can observe
the CS at a very close distance, or even traverses the CS, which provides us a
unique opportunity to look into fine properties and structures of the CS,
helping reveal the detailed physics of large-scale reconnection that was
impossible before. We evaluate the probability that PSP can traverse a CS, and
examine the orbit of a PSP-like spacecraft that has the highest probability to
traverse a CS.
