Similar in operation to the standard SuperTran-VP (STVP-100) cryostats, the STVP-100-FTIR includes a multiple position sample holder and a mounting flange to allow integration with a spectrometer. The sample is cooled by flowing vapor, and is therefore an ideal choice for studying materials that are difficult to cool by conduction.

The drawing below shows a standard STVP-100 sample positioner with coarse translation and rotation. If more precise translation and/or rotation is required, a linear manipulator may be mounted on the sample positioner for more accurate positioning. The drawing illustrates typical Fourier Transform Infra-Red (FTIR) windows, which may be altered to suit the specific application. The sample tube diameter may also be specified.

Standard STVP-100-FTIR features include:

• Sample in flowing vapor
• Multiple position sample holder
• Adjustable position sample positioner allowing sample rotation and translation
• Silicon diode temperature sensors on sample mount and vaporizer
• Mounting flange to fit spectrometer
• High efficiency cryogen transfer line
• Indium sealed, strain-relieved, cold windows
• Liquid helium cooling

Options include:

• Manually controlled precision linear and/or rotary manipulators
• Remotely controlled linear manipulator and/or rotary stage
• IR window materials, wedged or plane parallel
• Range of sample tube sizes available
• Liquid nitrogen cooling
• Electrical access to the sample
• A complete system solution including temperature controllers, pumping systems and storage dewars
• Isothermal zone sample tube (provides uniform sample temperature and enhanced operation with LN₂)

System Specifications	STVP-100-FTIR
Sample Environment	Liquid or flowing vapor
Temperature Range	< 2 - 300 K
Initial Cooldown Time	15 minutes
Temperature Stability (with controller)	50 mK or less
Orientation	Vertical for <4.5 K
System Weight (less transfer line)	Approx. 15 lbs.
Cryogen Consumption (cooldown)	0.5 liters LHe from 325 - 4.2 K
Cryogen Consumption (operation)	1.1 L/hr at 5 K w/LHe
Note: Specifications do not include parasitic or experimental heat loads.

 

• Manually controlled precision linear manipulator for vertical positioning of samples with 2" travel.
• Drum dial indicator for rotation of sample positioner along the vertical axis.
• Base plate (to interface with Thermo-Nicolet x700 spectrometer)
• Indium sealed cold windows (PPN and ZnSe)