Particle confinement time scaling of field-reversed configurations due to collisional velocity-space particle loss

Summary Form only given, as follows. The loss-cone-like scattering in velocity space, namely, the collisional velocity-space particle loss (VSPL), has been identified as an important loss mechanism in field-reversed configurations (FRCs). A finite-loss-time model, including the effect of the electric field profile, has been used to calculate an improved particle-confinement-time scaling of FRCs. The results also include the effect of the electric field. For a set of known operating parameters such as temperature, magnetic field, separatix radius, etc., the electric field is calculated from quasineutrality of the plasma. The scaling of particle confinement time as a function of temperature, tau varies as T/sup x/, shows that x can range from -0.3 to -2, depending on the operating parameters of the FRCs. x is -0.7 and -0.5 in the LHD and the Bohm scalings, respectively, and previous results with the fast-loss assumption shows the same scaling dependence on the temperature as the classical prediction, i.e., x=1.5.<>