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Atlanta, GA|Atlanta Marriott Marquis
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Deep geologic repository progress—2025 Update
Editor's note: This article has was originally published in November 2023. It has been updated with new information as of June 2025.
Outside my office, there is a display case filled with rock samples from all over the world. It contains a disk of translucent, orange salt from the Waste Isolation Pilot Plant near Carlsbad, N.M.; a core of white-and-bronze gneiss from the site of the future deep geologic repository in Eurajoki, Finland; several angular chunks of fine-grained, gray claystone from the underground research laboratory at Bure, France; and a piece of coarse-grained granite from the underground research tunnel in Daejeon, South Korea.
E. Montalvo, B. R. Shi1, R. Carrera, G. Y. Fu2, Z. Guo3, R. Haleltine, L. M. Hively4, G. H. Miley5, M. N. Rosenbluth6, K. Tani7, J. W. Van Dam, X. Xiao8
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1284-1289
Result of Large Experiment and Plasma Engineering | doi.org/10.13182/FST91-A29518
Articles are hosted by Taylor and Francis Online.
Alpha healing, alpha containment, and alpha stabilization effects are studied in the fusion ignition experiment IGNITEX. The IGNITEX device offers the possibility of producing fusion-ignited plasmas with ohmic heating alone. It is shown here that operating regimes with high probability for ignition and simplicity of operation are possible in IGNITEX. Time-dependent simulations showing the ohmic heating and alpha healing coupling through the discharge are presented. The characteristics for alpha transport with magnetic field perturbations are analyzed in detail using Monte-Carlo techniques. The stability of internal MHD modes and the interaction with alpha particles in the inner confinement region of ignited plasmas is studied. Specifically, the stability of resistive internal kinks, ideal internal kinks, and fishbones is presented. It is shown that a quiescent regime of operation is possible during the ignited phase in IGNITEX. Because of its ample ignition margin, its high alpha containment, and the possibility of operation far from marginal stability and the possibility of ignition operation with quiescent regimes in the inner region of the plasma, it is concluded that the IGNITEX device can produce fusion-ignited plasmas in a simple manner.