Commissioning of New Light Ion RFQ Linac and First Nuclotron Run with New Injector

In the frames of the NICA project development [1] the old HV fore-injector of the LU-20 linac, which was in operation from 1974, was replaced by the new RFQ accelerator in spring 2016. The first Nuclotron technological run with the new LU-20 fore-injector was performed in June 2016. During the following two runs of total duration of about 2500 hours the proton and deuteron (polarized and unpolarized), lithium and carbon beams were successfully injected and accelerated in the Nuclotron ring. Main results of the RFQ commissioning and experience of its operation are presented in this paper.