The Livermore Free-Electron Laser Program Magnet Test Laboratory

Test Laboratory supports the ongoing development of the Induction Linac Free-Electron Laser and uses magnetic-field measurement systems that are useful in the testing of long-period magnetic structures, electron-beam transport magnets, and spectrometer magnets. The major systems are described which include two three-axis Hall probe-and-search coil transports with computer-controlled data acquisition; an automated-search coil system used to detect very small inaccuracies in wiggler fields; a nuclear-magnetic-resonance (NMR)-based Hall probe-calibration facility; and a high-current DC ion source using heavy ions of variable momentum to model the transport of high-energy electrons. A high-precision electron-beam-position monitor, under development for use within long wigglers, that has a positional resolution of less than 100 mu m is discussed briefly.