Control of tungsten impurity source and edge transport using different gas injection with full tungsten divertor on EAST

•With the newly installed EAST lower W divertor, W source and edge transport are experimentally investigated for different Ne and D2 gas injection conditions.•W erosion on the whole divertor target can be well suppressed or mitigated by suitable edge Ne or D2 injection when divertor detachment is achieved.•A W screening enhancement is obtained during the attached divertor condition due to D2 injection.•After the divertor detachment, the core W content is observed to be kept in a high level, although W source from the divertor is strongly reduced.