2T/5T Two-Axis Cryogen Free Superconducting Vector Magnet With Variable Temperature Space

11th European Conference on Applied Superconductivity

Demikhov, E.I.^1,2 ; Demikhov, T.E.^1,2 ; Kostrov, E.A.^1,2 ; Lysenko, V.V.^1,2 ; Piskunov, N.A.^1,2

Lebedev Physics Institute of RAS, Leninskiy prospekt 53, k8, Moscow

119991, Russia^1

RTI, Cryomagnetic Systems, Leninskiy prospekt 53, k8, Moscow

119333, Russia^2

关键词: Conduction cooled;    High temperature;    Horizontal axis;    Magnetic system;    Niobium-titanium;    Sample holders;    Sample temperature;    Variable temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/3/032027/pdf
DOI  :  10.1088/1742-6596/507/3/032027

来源: IOP

【 摘 要 】

A conduction cooled 2T / 5T superconducting vector magnetic system with a variable temperature space was developed and tested. The system is based on a commercial two-stage 4 K Gifford-McMahon cryocooler with the cooling power of 1.5 W at 4.2 K. The cool down time of the magnet from room temperature to 3.2 K is 17 hours. The system provides sample temperature range of 6.0-300 K. The clear diameter of variable temperature space is 39 mm. A 5 T solenoid generates magnetic field in the vertical axis and a 2 T split coil generates field in the horizontal axis. The magnets are made of niobium-titanium wire wound on a copper former. A PC controlled rotary drive is applied to rotate a sample holder around the vertical axis. Thus the measured sample can be exposed to the magnetic field in any desired direction. A helium gas gap heat switch is used as a controllable thermal link between the variable temperature space and the 2nd stage to avoid overheating of the magnet at high temperatures of the sample. The system design, manufacturing and test results are presented.