One of the advantages of dry dilution refriegrators over wet dilution refrigerators is that there is more space available for customer wiring. The Triton offers 3 line of sight ports for high frequency coaxial lines or other custom services and 3 non-line of sight ports giving access for a variety of flexible wiring options.

 

Non-line of sight services

  • 24 way DC looms – Constantan or Cu/NbTi twisted pairs
  • S1 flexible coaxial lines – for use up to 500 MHz
  • Thermal clamping at PT1, PT2, Still, 100 mK and mixing chamber
  • Current leads for superconducting magnets
  • Wiring to suit commercially available nano-positioning devices
  • Custom services and optical fibres available

Line of sight services

The three line of sight ports available for high frequency coaxial lines or other custom services can be configured as two off KF40 and one off KF50 vacuum fittings, fully termintated for high frequency applications or blanked for customer fittings. In addition, a 65 mm central access LOS port is available for top loading sample access.

  • UT85 semi-rigid coaxial lines
  • Stainless steel inner / stainless steel outer conductor with PTFE insulation (UT85-SS-SS)
  • Beryllium Copper inner / stainless steel outer conductor with PTFE insulation (UT85-B-SS)
  • Niobium inner / Niobium outer conductor with PTFE insulation (UT85-Nb-Nb) from Still to mixing chamber
  • Heatsinking at PT1, PT2, Still, 100 mK and mixing chamber
  • SMA termination for frequencies up to 18 GHz
  • SK termination for frequencies up to 40 GHz
  • 20, 10, 6 dB attenuators at PT1, PT2 and Still plates available
  • Optional noise thermometry
  • Custom services and optical fibres available

Weak phonon-electron interactions at low temperatures make electron system cooling problematic in many applications. Fast pulse sequences for signal control is necessary in many areas of modern physics with corresponding high bandwidth wiring required. When working in the GHz frequency range, it is important to filter background blackbody radiation in the lines before it reaches the sample. Working with many of our customers, we have developed extensive high frequency wiring options with signal attenuation and heatsinking, to minimise electron temperatures on the sample or device.

  • Semi-rigid coaxial cables with frequency ranges up to 40 GHz
  • Heatsinking of outer conductor at all thermal plates
  • Heatsinking of inner conductor and filtering of blackbody radiation using attenuators
Dr Ziad Melhem of Oxford Instruments NanoScience will be giving a talk at MIT on the enabling technologies, require… https://t.co/MDz2SojzYv
5:21 PM - 16 Feb 18
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