Twisted Pair Wiring

Product Overview

Twisted Pair Wiring

We offer twisted pair wiring in sets of 12 pairs (24 wires). All wires are factory twisted and then bundled into fiberglass sleeving for protection. The wires are tested with quench cooling at low temperature. At every temperature stage, the bundle is thermally anchored on gold plated copper bobbins. One KF40 LOS-port can fit up 4x sets of 12 twisted pairs.


Options

Options

DC installation set

For proper thermalization and mounting of the gold plated copper bobbins we use a DC installation set. The DC installation set includes a hermetic feedthrough connector box at room temperature and 1x aluminum and 4x gold plated copper thermal anchoring flanges for the 50K, 4K, still, Cold plate and mixing chamber stages with 3 or 4 feedthroughs.

Break-out

The twisted pair wiring can have additional break-outs at any flange, to make installation of your devices easy.

Shielding

Our twisted pair wiring can be equipped with electromagnetic (EMI) shielding. We have a solution where we use a stainless steel sleeve around the wires together with a shielded housing for the micro-D connectors.


Technical

Technical Specifications

At room temperature (RT), each set terminates in a hermetic 24-pin Fischer connector. At low temperatures the wiring terminates in a 25-pin micro-D connector. The low temperature termination can be used as a break-out post (screwed to the experimental flange with an included gold-plated copper mounting bracket) or as a connector to be plugged directly into a for example a filter or sample holder box. Additional break-outs can be ordered at every temperature stage. In this case the micro-D termination coming from the higher temperature serves as break-out post and the termination of the continuing bundle serves as a connector. The customer can insert for example a filtering element at any later time.

Standard twisted pair wiring

36 AWG phosphor-bronze

RT – 4K:  14|10 Ohm/wire  (RT|cold)

4K – MXC:  14|10 Ohm/wire  (RT|cold)

RT – MXC:  22|17 Ohm/wire  (RT|cold)

35 AWG copper

RT – 4K:  4|<2 Ohm/wire  (RT|cold) Note: Includes additional thermal anchoring stage to pulse tube.

Low-Ohmic

RT – 4K: 35 AWG Cu (see above)

4K – MXC: NbTi/CuNi (superconducting) 65|<1 Ohm/wire  (RT|cold) Note: Includes connectorized break-out at 4K.

Attocube wiring


We have together with Attocube developed a low-ohmic wiring for their positioners and scanners. This set is not based on superconducting wires and can be used to operate the Attocube devices also at room temperature (positioner wire resistance < 5 Ohm).


Requirements

Technical Requirements

All the twisted pair wires are installed to KF40 port with DC installation set. Installation set consists 1x aluminum and 4x gold plated copper thermal anchoring flanges for 50K, 4K, still, cold plate and MXC stages with 3 or 4 feedthroughs.

SD

Free KF25 port (1–3 bundles) or KF40 port (1–4 bundles) for installation. If low-ohmic or copper wires are chosen, please make sure that there is space around pulse tube to install the pulse tube clamping.

LD

Free KF40 port (1–4 bundles) or KF63 port for installation. If low-ohmic or copper wires are chosen, please make sure that there is space around pulse tube to install the pulse tube clamping.

XLD

Free KF40 to KF25 port (1–3 bundles PhBr, copper and low-ohmic not possible in KF40 to KF25 ports), KF40 (1–4 bundles) or ISO100 port with 3x KF40 adapter set (3x1–4 bundles) for installation. If low-ohmic or copper wires are chosen, please make sure that there is space around pulse tube to install the pulse tube clamping.



https://bluefors.com/products/twisted-pair-wiring/


Twisted Pair Wiring
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