VarioxAC-TL Cryofree® cryostat with integral variable temperature insert

• Operating temperature range : 5 K to 200 K. 300 K option available
• Sample cooled in a static exchange gas.
• Temperature stability : +/- 2.5 % using Oxford Instruments ITC controller (measured over a 10 minute period)
• Exchange gas in the IVC (sample space) during operation 50 mbar at RT.
• Sample space : 35 mm diameter
• Heat exchanger fitted with a heater and clibrated Cernox sensor.

• Optical access
• Cryostat fitted with pulse tube cooler
• Flexible lines
• Compressor

• Neutron scattering and beamline experiments

The VarioxAC-TL is ideal for applications such as neutron scattering experiments where the cryostat is situated at a remote beamline experimental station. Thanks to its Cryofree technology, the user does not need to access the experimental area to top up with liquid helium.

• Quality control

We have shipped a system which is used for low temperature FT-IR analysis of single crystal silicon. At low temperatures, the number of free carriers becomes very small and the IR spectrum of the sample exhibits a series of absorption bands that are characteristic of each impurities. Also the carbon can be measured at lower concentrations because the two-phonon band transmission is increased by a factor of two allowing greater throughput to the detector that results in an increased signal to noise ratio.

Photo of the system cam be seen in the Images tab on this page.

VarioxAC-TL Top loading Cryogen-free optical cryostat. the picture on the right shows the cryostat integrated in a Bruker Vertex 80v spectrometer in a customer laboratory in China.