VTI with integral magnet mounting
The Variable Temperature Insert (or VTI) is a useful tool for studying material samples in a magnetic field at varying temperatures. The basic VTI consists of a cylindrical tubular structure that is inserted into the bore of a superconducting magnet. A sample is mounted onto a removable rod placed inside the VTI. The cylindrical structure separates the sample from the surrounding liquid helium environment. The temperature of the sample can be varied by flowing cold helium liquid or vapor through a throttle valve or by direct heating from an integrated heater. A cryogenic temperature controller can be supplied with the VTI.
The VTI can be separate from the magnet for installation in a bottom-loading dewar or the magnet can be mounted onto the VTI. In this configuration, the VTI structure acts as an integrated support stand incorporating the magnet mount, current leads, liquid level instrumentation, fill and vent ports, and pressure relief valves.