Challis, C. D.Conway, G.Hawkes, N. C.Stratton, B. C.Tala, , T.2004-12-032004-12-0320012001http://hdl.handle.net/2003/101110.17877/DE290R-10874enThe American Physical SocietyPhysical Review Letters530Observation of Zero Current Density in the Core of JET Discharges with Lower Hybrid Heating and Current Drive10.1103/PhysRevLett.87.115001article (journal)