Some people cannot read properly.

Below here the radiation is due to a change in direction caused by RE-
COMPRESSING exploding electron bunches.


http://en.wikipedia.org/wiki/Synchrotron_radiation

QUOTE:
" The magnets also need to repeatedly recompress the Coulomb-
exploding
space charge electron bunches. The change of direction is a form of
acceleration and thus the electrons emit radiation at GeV
frequencies."

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This radiation would still occur even if the synchrotron was a
perfeclty straight pipeline (In no way does this relate with the bend
of the synchrotron ring).