Formulation of radiation temperature in hohlraums with large radiation energy loss

This paper describes the radiation temperature of a hohlraum with large rad iation energy loss. The hohlraum radiation temperature is crucial for indir ect drive laser fusion and the radiation energy loss induced by the laser e ntrance hole or in other ways that can seriously reduce the radiation tempe rature. An analytic, concise formula is given in this paper, which needs no t assume a special form of laser pulse. The corresponding numerical results are given for some typical laser pulses. It is shown that the temperature correction due to the radiation energy loss is sensitive to its area fracti on, but relatively less sensitive to laser pulse shape, and weakly dependen t of the incident laser energy. (C) 2001 American Institute of Physics.