High resolution liquid helium optical cryostat: MicrostatHires2

Layout and dimensions

Windows

• A wide range of window materials can be fitted to the MicrostatHiRes2 - see the 'Windows for optical cryostats guide' in Downloads And Links
• A 0.5 mm thick Spectrosil B quartz window with 10 mm clear access is fitted as standard. We also offer an option for a 25 mm access diameter window with a thickness of 1.5 mm
• Transmission experiments use an alternative bottom flange with a second window fitted and a transmission sample holder
• Additional or replacement window flanges available via the Oxford Instruments Direct - Cryospares® on-line catalogue

Pump options

• A simple GF4 oil-free vane pump is supplied for operation to 3.2 K
• Lower temperatures to 2.7 K use an EPS40 single-stage rotary pump

Magnetic field options

• The MicrostatHiRes2 can also be fitted/retrofitted with a pillar for easy integration in a room temperature bore superconducting magnet or an electromagnet (see Images); the standard cap and the pillar are interchangeable
• For an integrated 5 T magnetic field solution see the MicrostatMO2

The MicrostatHiRes2 optical cryostat works on a continuous flow principle using an oil-free pump to draw liquid helium from a storage vessel along a transfer tube to the heat exchanger ("pull mode"). Temperature control is achieved by a combination of automatic or manual helium flow control and power dissipated in an electrical heater, regulated using a temperature controller.

The cryostat can also be used in "push mode", in that case the flow of liquid helium is generated by pressurising the storage dewar. The advantage is that the need for a gas flow pump is removed, eliminating the vibration and noise generated by the pump and reducing system cost.

NEW Transfer tube - It plays an important part in the overall helium consumption and base temperature capability of helium cooled cryostat. 

Oxford Instruments Low Loss Transfer tubes (LLT) use the cold gas exiting the cryostat to cool the shields surrounding the incoming liquid within the trasfer tube.  As a result, the consumption of our cryostats is the lowest on the market, dramatically reducing your running costs.

We can also offer an extra flexible transfer tube for those with restricted space in their labs.  Please note that as this does not use the gas cooled mechanism, helium consumption will be higher that for the LLT range.  However it will be well suited to those who need lightweight and more flexible transfer tube.

NEW Gas flow controller - The new VC-U gas flow controller now includes the nitrogen and helium flow meters as standard.

NEW Intelligent cryogenic environment controller - Easy monitoring and control of the sample stage.  The MercuryiTC controller combines several instruments into one allowing temperature control at the heat exchanger and glas flow control as well as an extra sensor channel for thermometry measurement directly at the sample stage.  Everything can be accessed through touch screen front panel and remotely via Labview compatible Oxsoft IDK software.

Example MicrostatHe2: You can control the temperature with a sensor and heater at the heat exchanger, monitor and control the gas flow, AND have an extra sensor channel to measure sample temperature.

NEW Magnet power supply - Best in class stability performance and optimised for accuracy and low noise. 

New Oxsoft IDK instrument development kit software - With the new Oxsoft IDK, you have new levels of control.  You can design remote control and configuration programs and integrate your system into your preferred experiment control architecture.