The Cryogen-free Measurement System. CryoAdvance, Inc.

The cryostat CryoMagn 5-40-17 with superconducting magnet up to 17 T at 4.2 K is a magnified modification of the CryoMagn 1-40-12. The cryostat has larger reservoirs for cryogenic liquids, and the highest maximum field in comparison with other solenoids of the CryoMagn family. The applications are the studies of the superconductivity, the Hall effect, magneto-optics and others. The built-in liquid helium level gauge and removable liquid helium transfer line provide the helium level monitoring and filling services.

The specific feature of this model is that the superconducting solenoid consists of a number of sections connected and fitted serially by the same current from the power supply. The inner sections of solenoid are made from the multifilament wire based on the Nb₃Sn superconductor.

The outer part of solenoid is made from the multifilament wire based on the NbTi superconductor. Special insulating fiberglass cloth covers the wire. The annealing of the assembled solenoid at 700 °C for about 100 hours improves the mechanical and electrical properties of used materials. The attachable copper or HTSC current leads maintain relatively low helium consumption. The resistor/diode protection circuit secures the safety use of the superconducting solenoid. Special circuit secures the transition time elongation to avoid a damage of the cryostat during occasional transition to the normal state. As an option, we supply a superconducting switch to maintain the superconducting short-cut regime, as well as the electrical power supply for solenoid.

Central field at 4.2 K, T

17

Homogeneity in a 10 mm sphere near the center of solenoid

10^-3

Maximum sweep rate, T·sec^-1

0.01

Maximum current, A

400

Solenoid bore, mm

30

Helium reservoir capacity, L

60

Nitrogen reservoir capacity, L

40

Liquid helium consumption during cooling to 4.2 K, L

80

Liquid helium consumption during operation, L/hour

0.4

Liquid helium consumption with removed current leads, L/hour

0.2

Cryostat overall height, mm

1520

Cryostat diameter, mm

450

Total weight of cryostat, kg

330

Complete system

1. CryoMagn 5-40-17 cryostat.

2. Built-in helium level sensor.

3. Electronic unit for level monitoring.

4. Variable length liquid helium transfer line.

Optionally

1. Variable temperature insert INMAGN-115-1.2-He4 for temperature 1.2 - 300 K.

2. Temperature controller tSTAT310 with Manostat.

3. Variable temperature insert INMAGN-112-03-He3 for temperature 0.3 - 1.4 K.

4. Sample holder.

Additional equipment

1. Liquid nitrogen level indicator.

2. Liquid nitrogen and helium storage vessels.

3. Additional sample holders.

Key benefits

• Extremely low helium consumption.

• High reliability.

• Competitive price.