Bus design, development and test for the Superconducting Super Collider
ABSTRACT The power bus to be used in the Superconducting Super Collider
magnets must operate in supercritical helium at 4.35 K and about 4 atm.
The bus is nominally 17 m in length, must accommodate large differential
thermal contractions, and must be amenable to large-quantity,
cost-effective production, installation, and joining to adjacent
magnets. It must be stable with respect to the largest credible
disturbance and be protected in the event of a propagating normal
region. Stability and protection requirements are satisfied in the
design presented with Super Collider cable for the conductor located
between, and soldered to, two copper braids. Variations in the energy
margin and in the protection characteristics of the bus as a function of
the braid dimensions and channel cooling characteristics are discussed.
A stability and quench test program for the bus is underway. Results to
date are described, and the status of design and production of full
length bus sections is given