Re: which accelerator?

michael wrote:
I'm trying to find out if there exist any electron accelerators which produce electron energies in the GeV range and which have large luminosities (preferable more than 100 A) and also with high energy resolutions (less than 0.01 percent).

Your desires are self inconsistent, at least for current technology. For instance, 100 A at 1 GeV is about 10,000 MegaWatts -- FAR above any current accelerator (1 MW is a challenge).

CEBAF (at Jefferson Lab in Virginia) is a 3-6 GeV electron accelerator with probably the highest beam current at similar energies. IIRC it is a few milliamps, certainly far below 100A. SLAC (in Stanford California) is much higher energy, but lower current. Google is your friend, and you can find their actual parameters yourself.

Note that luminosity is more than beam current, and the emittance of the beam is just as important as overall current.

For electrons, good energy resolution is a challenge because of synchrotron radiation. I don't know if 0.01% is possible at a few GeV -- look at the mass resolution of the psi/J factories (3.1 GeV/c^2, so the beams are ~1.5 GeV).


Tom Roberts
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