The Optimization of the C-2W Experimental Device for Energetic, Long-Lived Plasma

The experimental device C-2W [1], also known as Norman, was initially optimized in early 2019 to performance levels up to and exceeding its specified design points. Plasma durations on the order of 100s of Alfven times (??_??) coinciding with the energy storage capabilities of the facility (30 ???? duration) and total plasma temperatures in excess of 1000 ???? represent a minimal expression of these design points. Through an iterative series of optimization of formation / target generation, magnetic field topology shaping, neutral beam power, edge biasing, and gas fueling this goal was realized. Google's optometrist algorithm was integral to this process [2]. Here we describe some of the processes involved in these optimizations and how they have led to greater insight about FRC plasmas and the most high-performance FRCs ever generated.

[1] H. Gota et al., Nucl. Fusion 61, 106039 (2021)

[2] E.A. Baltz et al., Sci Rep 7, 6425 (2017)