%0 Journal Article %1 hawkes.2001 %A Hawkes, N. C. %A Stratton, B. C. %A Tala, T. %A Challis, C. D. %A Conway, G. %A DeAngelis, R. %A Giroud, C. %A Hobirk, J. %A Joffrin, E. %A Lomas, P. %A Lotte, P. %A Mailloux, J. %A Mazon, D. %A Rachlew, E. %A Reyes-Cortes, S. %A Solano, E. %A Zastrow, K-D. %D 2001 %I American Physical Society %J Phys. Rev. Lett. %K efit i-mhd JET tokamak current_hole current_reversal equilibrium %N 11 %P 115001 %R 10.1103/PhysRevLett.87.115001 %T Observation of Zero Current Density in the Core of JET Discharges with Lower Hybrid Heating and Current Drive %U http://link.aps.org/doi/10.1103/PhysRevLett.87.115001 %V 87 %X Simultaneous current ramping and application of lower hybrid heating and current drive (LHCD) have produced a region with zero current density within measurement errors in the core ($r/a<0.2$) of JET tokamak optimized shear discharges. The reduction of core current density is consistent with a simple physical explanation and numerical simulations of radial current diffusion including the effects of LHCD. However, the core current density is clamped at zero, indicating the existence of a physical mechanism which prevents it from becoming negative.

@article{hawkes.2001, abstract = {Simultaneous current ramping and application of lower hybrid heating and current drive (LHCD) have produced a region with zero current density within measurement errors in the core ($r/a<0.2$) of JET tokamak optimized shear discharges. The reduction of core current density is consistent with a simple physical explanation and numerical simulations of radial current diffusion including the effects of LHCD. However, the core current density is clamped at zero, indicating the existence of a physical mechanism which prevents it from becoming negative.}, added-at = {2009-03-05T20:25:23.000+0100}, author = {Hawkes, N. C. and Stratton, B. C. and Tala, T. and Challis, C. D. and Conway, G. and DeAngelis, R. and Giroud, C. and Hobirk, J. and Joffrin, E. and Lomas, P. and Lotte, P. and Mailloux, J. and Mazon, D. and Rachlew, E. and Reyes-Cortes, S. and Solano, E. and Zastrow, K-D.}, biburl = {https://www.bibsonomy.org/bibtex/22abb26665d0cb23f0e4d056e37082401/prodrigues}, description = {The first observation of a current-hole plasma in the JET tokamak.}, doi = {10.1103/PhysRevLett.87.115001}, interhash = {c78543252508e6e4b9ae7f4dd4b21da8}, intrahash = {2abb26665d0cb23f0e4d056e37082401}, journal = {Phys. Rev. Lett.}, keywords = {efit i-mhd JET tokamak current_hole current_reversal equilibrium}, month = Aug, number = 11, numpages = {4}, pages = 115001, publisher = {American Physical Society}, timestamp = {2009-03-05T20:25:23.000+0100}, title = {Observation of Zero Current Density in the Core of JET Discharges with Lower Hybrid Heating and Current Drive}, url = {http://link.aps.org/doi/10.1103/PhysRevLett.87.115001}, volume = 87, year = 2001 }