Hanisch, John L.

Emission of radiation from an argon and helium plasma perpendicular
to the applied magnetic field in the x-band is discussed. Microwave
emission was observed when the cyclotron frequency at the center of the
plasma was above the mixer frequency of the radiometer, and at what
appears to be multiples of the cyclotron frequency. An explanation of
the microwave emission based on the solution of the Boltzmann equation
assuming electron-neutral collisions is discussed. The temperature and
density of the plasma were determined from probe and spectroscopic
experiments. Temperatures in the range of 4 to 16 eV were measured and
probe data indicated a plasma density from (0.5 - 3) x 10^9 cm^-3.

The steady decline in the enrollment of students in the physics
program at the secondary school level demands a reevaluation of the
objectives of the present program. The real problems which are present
in the school today are discussed, and the present objectives and
courses are analyzed and rejected because they do not solve these
problems. A new set of objectives is suggested and a course which
meets these goals is discussed. A sample three week unit from the
course is designed and shows that the course is practical and can be
incorporated on a national level.