Electron beam diagnostics in the Fermilab electron cooling experiment

Successful electron cooling of antiproton beams requires a precisely aligned and high quality electron beam. Mean e;sup -; momentum and energy are to be held within 0.25 mrad and ;one-half;eV respectively. In addition the e;sup -; ''temperature'' about this mean (rest frame velocity spread) should be held to ;less than equivalent to;;one-half; eV. The diagnostics required to align the beam in angle and energy are rather straightforward. The temperature measuring diagnostics are more exotic. 4 refs