  We consider synchrotron-like radiation in QCD by generalizing Schwinger's
treatment of quantum synchrotron radiation in QED to the case of a constant
chromomagnetic field. We suggest a novel mechanism for {\em jet quenching} in
heavy ion collisions, whereby high-$p_t$ partons get depleted through strong
(classical) color fields. The latters are encountered in the color glass
condensate or in the form of expanding shells of exploding sphalerons. Unlike
bremsstrahlung radiation through multiple soft rescattering, synchrotron
radiation converts a jet into a wide shower of soft gluons. We estimate the
energy loss through this mechanism and suggest that it contributes
significantly to the unexpectedly strong jet quenching observed at RHIC.
