A robust, 4-wire cable for use in cryogenic environments to room temperature. The cable is designed around 32 AWG (203 μm) diameter superconductive wires consisting of a NbTi core (128 μm diameter) and a Cu-10% Ni jacket.
The cable is constructed as follows:
- 4 superconductive wires are overcoated with 75 μm (0.003 in) thick Teflon® (PFA) of the following colors: white, yellow, green, and black.
- 4 lengths of Teflon®-jacketed wire, one of each color, twisted together with a twist pitch of about 25 mm (1 in). Teflon® (PFA) is extruded over the 4 wires to a total diameter of about 1.2 mm (0.048 in).
- Cable is overbraided with 304 stainless steel (5 × 36 AWG). The overbraid is tight and presents complete visual coverage.
- Teflon® (PFA) extruded over the entire cable for protection of the metal overbraid. The total finished cable is nearly round with a diameter of about 2.4 ±0.2 mm (0.094 ±0.008 in).
Minimum bend radius: 15 mm (0.6 in)
Critical temperature: 9.8 K
Critical field: 10 T
|Field||Critical current (per wire)|
|3 T||35 A|
|5 T||25 A|
|7 T||15 A|
|9 T||6 A|
|Wire resistance (Ω/m)||9.2||8.4||0*|
|Overbraid resistance (Ω/m)||0.90||0.64||0.62|
entire cable assembly (W/(m·K))