The concept of a new fusion device, which is a composite of a stellarator and linear theta pinches, is proposed. The device in a racetrack configuration consists of two linear segments, which are theta pinches. The latter are joined via the two halves of a stellarator, which form the curved segments. The primary purpose of theta pinch sectors of modest lengths will be to provide a technologically convenient and efficient method of producing a high β fusion grade plasma in a stellarator, which remains a difficult issue. In view of the very high densities and moderately high temperatures available from theta pinches, one can envision a modest size closed device with nτconf ∼ 6 × 1014 cm−3 s, which indicates fusion feasibility.
Simulating fusion alpha heating in a stellarator reactor