A useful model for calculating the variation in the electron density, ion density, and ambipolar potential along magnetic field lines in the thermal barrier cell of a tandem mirror is presented.

Visits were made to 4 small manufacturers to ascertain the potential impacts on small consumer-product manufacturers of the certification and enforcement portions of DOE's energy-efficiency-standards program. Particular concern was expressed about the possible need for large capital investments in new test facilities in which to perform the tests and the extent to which manufacturer test facilities and technical staff may be diverted from necessary research and development and quality-control activities. Subsequent to the visits, several requirements were added to the proposed rule for the retention of units of covered basic models, involving such actions as retaining the certification batch sample for various times and measured efficiencies. Discussions and results of the visits are presented in the appendices.