  The LPMWPC can be used as the {\Delta}E detector for the low-energy charged
particle detection. In order to increase the transmittance, the wires were
adopted as the cathode. This work investigated the LPMWPC signal
characteristics of this configuration and measured the gas gain with a mixture
of 90%Ar and 10% CO2 from 1E3 to 1E5 Pa. From the test, the second pulse after
the avalanche signal was observed, which proved to be caused by the ions'
drifting near the cathode wire.
