We are studying a high charge state ion beam provider based on a laser ion source using the direct plasma injection scheme (DPIS). Recently, we achieved 55 mA of Al11+ beam accelerated by an RFQ linear accelerator. This is a very high value compared to the beam intensities achieved so far for heavy-ion beams captured and accelerated by RF accelerators. This increase in beam current is largely due to our understanding of the ion-extraction conditions at the entrance of the RFQ. The optimal extraction structure was investigated. No breakdown was observed between the RFQ and the ion source. Details of the experiment and future plans will be presented. In addition, the test results of the newly developed RFQ electrode will be reported. This electrode is designed to capture more ions. It is also the first four-rod RFQ with a variable B concept.