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The CryoSaver™ family of current leads
uses American Superconductor's proprietary multifilamentary
high temperature superconducting (HTS) tapes to create a robust,
reliable current lead.
The multifilamentary composite conductor displays
tolerance for strain and thermal cycling that is superior to
other types of HTS wire. The CryoSaver current lead is designed
for conduction cooling, and requires no helium vapour flow.
Field Tolerance
CryoSaver current leads exhibit superior tolerance
for applied magnetic fields along two axes. The anisotropic
nature of the leads allows the lead to be positioned in a cryostat
such that applied fields are along a favourable axis.
This is a distinct advantage over isotropic
bulk materials, which have relatively poor field tolerance that
is equal along all axes.
Ease of Integration
The CryoSaver lead has a number of features
that enhance the ease of integration into many types of cryogenic
systems.
The CryoSaver lead requires no special storage
or handling, and can be kept for months in normal conditions
without any loss of performance. Electrical connections can
be soldered or bolted. The rigid structure requires no special
engineering by the user for support, stress relief, or vibration
isolation.
The CryoSaverT current lead is based on American
Superconductor's proprietary 85 filament composite conductor
(Figure 1).
The extremely fine filaments yield a robust
and flexible conductor, just as flexible optic cables are made
from fibres of brittle glass.
Standard CryoSaverT Current Leads (Vacuum
Environment*)
Model Number |
Dim "A" |
Dim "B" |
Operating
Current 64 K |
Conductive
Heat Leak at 64 K
- 4.2 K (per pair) |
CS010030 |
.375 (9.53) |
.130 (3.30) |
100 A |
32 mW |
CS025030 |
.438 (11.13) |
.250 (6.35) |
250 A |
76 mW |
CS050030 |
.563 (14.30) |
.250 (6.35) |
500 A |
145 mW |
CS100030 |
.750 (19.05) |
.375 (9.53) |
1000 A |
285 mW |
CS200030 |
1.00 (25.4) |
.438 (11.13) |
2000 A |
480 mW |
* Discuss options with us regarding hermetic
leads for helium service.
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