We are planning experiments using a Field Reversed Configuration (FRC) plasma injected into a metal cylinder, which is subsequently electrically imploded to achieve a fusing plasma. Diagnosing this plasma is quite challenging due to the short timescales, high energy densities, high magnetic fields, and difficult access. We outline our diagnostic sets in both a Phase I study (where the plasma will be formed and translated), and Phase II study (where the plasma will be imploded). The pre-compression plasma (diameter of only 8-10 cm, length of 30-40 cm) is expected to have n approximately 10 to the seventeenth power cm to the negative 3 power, Tapproximately 100- 300eV, B approximately 5T, and a lifetime of 10-20 microseconds. We will use visible laser interferometry across the plasma, along with a series of fiber-optically coupled visible light monitors to determine the plasma density and position. Excluded flux loops will be placed outside the quartz tube of the formation region, but inside of the diameter of the theta-pinch formation coils. Impurity emission in the visible and XUV range will be monitored spectroscopically, and fast bolometers will measure the total radiated power. A 20-Joule Thomson scattering laser beam will be introduced in the axial direction, and scattered light (from multiple spatial points) will be collected from the sides. Neutron diagnostics (activation and time-resolved scintillation detectors) will be fielded during both phases of the DD experiments.
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