STVP-100-FTIR cryostat for FTIR spectroscopy

Optical continuous flow cryostats for FTIR applications. These cryostats are similar to our standard model STVP-100 cryostats, but with the modifications for integrating the cryostat with your spectrometer system.

Standard configuration

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 standard STVP-100 sample positioner has 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 infrared (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)
Base plate or mounting flange to interface with a customer-owned spectrometer

STVP-100-FTIR specifications

Sample environment	Liquid or flowing vapor
Temperature range	<2 to 325 K
Initial cooldown time	15 min
Temperature stability (with controller)	50 mK or less
Orientation	Vertical for <4.5 K
System weight (less transfer line)	Approximately 15 lb
Cryogen consumption (cooldown)	0.5 L LHe from 325 K to 4.2 K
Cryogen consumption (operation)	1.1 L/h at 5 K with LHe
NOTE: Specifications do not include parasitic or experimental heat loads.

Optional configurations

Special Model STVP-100-2-FTIR

Manually controlled precision linear manipulator for vertical positioning of samples with 2 in travel
Drum dial indicator for rotation of sample positioner along the vertical axis
Indium-sealed cold windows (PPN and ZnSe)

STVP-100-FTIR with mounting flange designed for use in a Bomem FTIR spectrometer

This cryostat was designed for use in a Bomem FTIR spectrometer. It has ZnSe outer windows in one axis and polyethylene windows in the other axis. The user requested a precision sample positioner with a special compact three-position sample holder and a manual precision linear/rotary manipulator.