The Axicell MFTF-E magnet system will provide the field environ ment necessary for tandem mirror plasma physics investigation with thermal barriers. The performance ot the device will stimulate DT to achie'v energy break-even plasma conditions. Operation will be with deuterium only. There will be ?4 super conducting coils consisting of ? sets of yin-yang pairs, 14 central-cell solenoids, ? sets of axicell mirror-coil pairs, and ? transition coils between He axicell mirror coil-pairs and the yin-yang coils. This paper describes the pronress in the design and construction of NFTF-B Superconducting Magnet System. FUNCTIONAL RCQUIREMENTS AND COIL CHARACTERISTICSAxicell MFTF-B magnet configuration is chosen over A-Cell MFTF-B [1] configuration because, in axicell, it has higher Q (defined as the ratio of fusion output energy to olasma input heating energy), lower capital cost, and reduced radial transport. The axicell magnets have better geometry in the end-plug region and looks better as a fusion re?clor magnet system. The magnet coil configurations, as shown in Fig. 1, were determined based on the field reouirements over the plasma region and on other requirements, such as the penetration access for the plasma heating heams and the diagnostics and space for cryopumpinc. The magnet array and the profiles of on-axis field are shown in Fig. 1. Table 1 lists the important coil parameters and magnet characteristics. The configuration will accommodate a plasma column at central cell with a 30-cm plasma radijs plus allowance for a 15-cm-thick plasma halo. The anchor cells will be a yin-yang pair with a mirror ratio of 3.0, instfci") of the 2.1 ratio in the original MFTF design. The mirror field will be 3.0 T. The field at the mirror center will be 1,0 T and the mirror-to-mirror length will be 5.1 m. The nn'dplane-to-midplane distance from the east yin-yang pair to the west yin-yanq pair will be 40 m.The axicell plug roils (Al and A2) will generate a P-T mirrur at the inboard and a 12-T mirror at the outboard, with a 4-T field-well between them. The center cell will consist of 14 solenoios spaced 1.25 m apart. These solenoids will produce a uniform axial field, variable up to 1.6 T.

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