Plans for a Pulse-Heated Vertical ECE System

A diagnostic system is being implemented on PBX‐M which measures the time response of synchrotron emission to a brief pulse of Lower Hybrid (LH) power. Such a diagnostic might yield information about those plasma parameters which induce temporal changes in the emission.1 The system, developed around a ten channel grating polychromator, will yield a 40×10 signal in time/frequency space. This data set might lead to information about: the magnetic field pitch, the ion charge state, the plasma density, or the deposition profile of the LH pulse. Simulations of the time/frequency radiation patterns for typical PBX‐M plasmas will be presented, and from these the utility of the diagnostic in this experiment will be evaluated.