Dilution refrigerator with magnet

Trade name
Triton 200
Technical description

The 3He/4He dilution refrigerator operating in a closed cycle allows reaching and stabilizing temperatures in the range from 10 mK to 30 K. Cooling power at 100 mK is 200 μW, and at 20 mK is 4 μW. The integrated superconducting magnet allows to generate the magnetic field up to 14 T.

The unique system of sample exchange allows to change the sample at a temperature of 10 K. Thus, the time needed to replace and cool the sample to 100 mK is 72 hours.

The refrigerator is equipped with 2 bundles of 12 pairs of wires for DC current measurements. One bundle is made of constantan and the other one (superconducting) is made of Cu/NbTi. There are also 8 coaxial cables allowing to perform AC measurements up to 500 MHz.

The temperature measurement is carried out using the RuO2 thermometers calibrated in temperature range from 50 mK up to 30 K. An accurate measurement at temperatures < 50 mK is possible by using a CMN reference thermometer and a superconducting cascade thermometer SRD1000.

Basic parameters: The minimum temperature:  < 10 mK. Cooling power at 100 mK: 200 μW. Cooling power at 20 mK: 4 μW. Sample exchange time: 72h. Number of available DC cables: 24 (constantan or Cu/NbTi). Number of available AC lines: 8 coaxial cables up to 500 MHz.

Conditions for providing infrastructure

Equipment is available in accordance with the Regulations for the Use of ACMiN's Research Infrastructure. (https://acmin.agh.edu.pl/acmin/dokumenty/)

Type of accreditation / certificate:
Not applicable
Access type
External
Research capabilities
  1. Measurements of electronic transport, Hall effect and magneto resistances can be performed using both DC and AC techniques. The measurement is performed in the temperature or magnetic field sweep mode.
  2. The measurement of specific heat takes place at a constant pressure Cp by a relaxation method measurement that combines high accuracy of measurement with uncomplicated analysis techniques.

 

Last update date
Aug. 30, 2023, 12:47 p.m.
Year of commissioning
2013
Measurement capabilities

Measurement parameters of electric transport:

  • Sample size: 5 x 8 x 3 mm (w x l x h).
  • IMAX: 10 mA.
  • Voltage drop: 100 nV  –  10 V.
  • 50 mK < T < 30 K.
  • 0 T < B < 14 T.

Measurement parameters of specific heat:

  • Sample size: 5 x 3 x 1 mm (w x l x h).
  • 50 mK < T < 30 K.
  • 0 T < B < 14 T.
Photos
Triton
Triton