Abstract
The group velocity of whistler wave packets was measured in an overdense cylindrical plasma. The phase velocity was measured using c.w. excitation. The waves are excited and received by small antennae which excite and detect an oscillating B field in the plasma. The dispersion relation for whistler waves in a cylindrical plasma is calculated. It is seen that for omega < omega ce/2, it is necessary to include collisions to account for the experimental results for the real part of the dispersion relation. In the limit of large collisions the dispersion relation goes to the plane wave result. It is found that there exists a range of plasma parameters for which two modes of the whistler waves are excited. It is also shown that whistler waves can be used in an interferometer system to measure plasma density.
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