  Three solenoids have been wound and with MgB2 strand and tested for transport
properties. One of the coils was wound with Cu-sheathed monofilamentary strand
and the other two with a seven filament strand with Nb-reaction barriers, Cu
stabilization, and an outer monel sheath. The wires were first S-glass
insulated, then wound onto an OFHC Cu former. The coils were then heat treated
at 675C/30 min (monofilamentary strand) and 700C/20 min (multifilamentary
strand). Smaller (1 m) segments of representative strand were also wound into
barrel-form samples and HT along with the coils. After HT the coils were epoxy
impregnated. Transport Jc measurements were performed at various taps along the
coil lengths. Measurements were made initially in liquid helium, and then as a
function of temperature up to 30 K. Homogeneity of response along the coils was
investigated and a comparison to the short sample results was made. Each coil
contained more than 100 m of 0.84-1.01 mm OD strand. One of the 7 strand coils
reached 222 A at 4.2 K, self field, with a Jc of 300 kA/cm2 in the SC and a
winding pack Je of 23 kA/cm2. At 20 K these values were 175 kA/cm2 and 13.4
kA/cm2. Magnet bore fields of 1.5 T and 0.87 T were achieved at 4.2 K and 20 K,
respectively. The other multifilamentary coil gave similar results.
