Synchrotron radiation is electromagnetic radiation caused by radically accelerated particles. Typically, a synchrotron accelerator is used in production of synchrotron radiation.

John R. Helliwell has written:

'Macromolecular crystallography with synchrotron radiation' -- subject(s): Analysis, Nucleic acids, Proteins, Synchrotron radiation, Viruses, X-ray crystallography

Yes, synchrotron radiation is emitted perpendicular to the circular path of the electrons. This is because the radiation is generated when the electrons are deflected, or accelerated, due to the magnetic field in the synchrotron. The emitted radiation is tangential to the circular path, resulting in a perpendicular radiation pattern.

Electrons are all around us; it isn't particularly hard to find them.

K. K. Usman has written:

'Exafs studies using synchrotron radiation'