Cryogenic refrigerator with optical vector magnet

The OV-CFM system is based on a well-proven modular design incorporating proprietary technology to allow a vector magnet and integrated variable temperature sample space to be operated in a way that allows precise temperature control while varying the magnetic field. The magnet operates dry and no liquid cryogens are required at start up or during operation

Cryogenic magnet system

Cooling for the magnet and Variable Temperature Insert will be provided by cryocooler technology. The magnet will be designed to operate safely at the guaranteed field. Two horizontal through lines of sight are incorporated into the side of the cryostat permitting optical access to the field centre in both x and y. The full set of windows is designed to allow ±10 degree horizontal access in each line of sight.

Reservations & Training
Inventory ID:
ENG-E002
Manufacturer:
Cryogenic Ltd.
Model:
5T-2T-2T
Year Installed:
2021
Category
Characterization
Section
Engineering
Room Number:
L4D36b
Open to External Use?:
No
Operation:
User/Staff Operated
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Features

Magnet model CFM-3D-30-VTI

» Cryocooler » Cryocooler from Sumitomo (twin 1W PT)

» Cooldown to operating temperature » System cooldown to operating temperature <48 hrs (design 36hr)

» Sample Space » Nominally Ø30 mm (29mm clear)

» Optical access » 4-way access in horizontal x-y plane» ±10 degree opening angle » z-cut Quartz as standard » Ø15mm VTI; Ø75mm RT

» Temperature range (static gas VTI) » ≤2 K to 325 K with 15m3/hr pump

» Temperature stability (after stabilisation) » 0.2% of set temperature (0.1% design)

» Maximum singleaxis field @≤4.2 K » 5 T (z) » 2 T (x) » 2 T (y) » 7 T (z) » 2 T (x) » 2 T (x) » 9 T (z) » 2 T(x) » 2 T (x)

» Maximum 3D (4p) dynamic vector @ ≤4.2 K » 1.5 T (1.8T design) ; ≤ 2hr for full rotation

» Central field homogeneity » X-axis: ≤0.5 % over 10 mm dsv (design <0.3%) » Y-axis: ≤0.5 % over 10 mm dsv (design <0.3%) » Z-axis: ≤0.6 % over 10 mm dsv (design <0.5%)

 

Key features » Energise single coil only (for field in X, Y or Z direction only) » Energise two coils simultaneously for 2-d path dependent experiments » Energise three coils simultaneously for 3-d path dependent experiments » Set vector field and vary both vector magnitude and/or vector direction » Set field in one coil (e.g. z-axis) and use other two coils (e.g. y & z axes)