“…At Los Alamos, we routinely lase at --.3I.tm using a conventional permanent magnet wiggler [2] one meter long with a period of 2.73 cm, a peak field of -0.4 T, using four pairs of magnets per period of square (0.5 by 0.5 cm) cross section along with a conventional rf accelerator [3] with an energy of *,40 Mev, a peak current of several hundred amperes, and very low emittance. We decided to test our accelerator, optical, and wiggler systems by trying to lase at the shortest possible wavelength, limited by the accelerator's maximum energy and modifications we could make to the wiggler using the support structures and magnets we already had.…”