  Synchrotron radiation has markedly different behavior in $\sim
10~\textrm{keV}$ and in $\sim 100~\textrm{keV}$ plasma. We show that
high-energy electrons which occupy the tail of velocity distribution function
have disproportionate impact on power loss of $\sim 100~\textrm{keV}$ plasma.
If electrons with energy more than a cutoff energy are redistributed while
keeping the Maxwellian distribution function below cutoff energy intact, both
emission and absorption of synchrotron radiation act to decrease the lost
power. These novel radiation transport effects in non-equilibrium plasma
suggest large utility in the deconfinement of high-energy electrons to reduce
synchrotron radiation in applications where the radiation is deleterious.

Plasma Physics