Because of the extreme differences between electron mass and nuclear mass, kinetic energy exchange between electrons and nuclei is very inefficient. As a result, a plasma with different electron temperature and nuclei temperature can exist for a long time. For example, the electron gas in fluorescent lamps can reach 20,000K while ions and molecules are only slightly above the room temperature. So I am curious whether it is possible to make a plasma with cold electron gas and hot nuclei. For example, in tokamak devices, only the thermal movement of deuterium and tritium nuclei is implicated in the nuclear fusion. The thermal movement of electrons OTOH drains energy away via bremsstrahlung radiation. If we can heat up the nuclei directly instead of heating up the electron gas, will the electron gas eventually cool down due to the radiation loss?