Overview

Click button below to enlarge photo of ST-100 optical cryostat from Janis Research, cryogenic equipment

Optical continuous flow cryostat suitable for a wide range of applications: the window material and geometry can be specified to allow spectroscopy with excitation energies from gamma rays through to the far infrared.

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Standard Configuration

Designed for experiments requiring optical access to the sample, the Janis Research ST-100 includes the following components:

Click button below to enlarge view of mechanical drawing of Janis Research model ST-100 SuperTran continuous flow cryostat with sample in vacuum, Janis Research, cryogenic research equipmentEnlarge

ST-100 Optical Cryostat Mechanical Drawing

  • Optical vacuum shroud
  • Optical radiation shield
  • Four (4) 1.625" clear view quartz windows
  • Optical sample holder
  • One (1) 10-pin electrical feedthrough
  • Three (3) blank feedthrough ports
  • Temperature sensor
  • 6' superinsulated cryogen transfer line
  • System test

Typical Applications:

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Specifications

Specification SuperTran
(Sample in Vacuum)
Temperature Range <2-325 K (500 K, >700 K optional)
Initial Cooldown Time 15 minutes
Nominal Temperature Stability (with controller) 50 mK or less
Orientation any position (with increased helium consumption)
System Weight (without transfer line) 10 lbs (4.6 kg)
Cryogen Consumption on Cooldown 0.4L LHe (325 - 4.2 K)
0.1L LN2 (325 - 77 K)
Nominal Cryogen Consumption Rate

0.5 L/Hr LHe (5 K)
0.1 L/Hr LN2 (100 K)

NOTE: Specifications do not include optical or experimental heat loads and assume vertical orientation.

Typical Cryogen Consumption of Optical SuperTran Cryostats

Click button to enlarge view of SuperTran and SuperTranVP liquid helium consumption rate, Janis Research, cryogenic equipment

 

 

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Other Configurations

Other Optical Configurations:

  • Special window geometry
  • Optional fifth window
  • High temperature (500 K), (700 K)
  • Customized window materials
  • Gas introduction ports
  • Large diameter sample space
  • Sample holder and wiring for DLTS
  • Specially modified window block with large window options
Click image to enlarge view of mechanical drawing of ST-100 with rotatable vacuum shroud for matrix isolation

Special ST-100 SuperTran with Rotatable Vacuum Shroud for Matrix Isolation

Click photo to enlarge view of special ST-100.Click photo to enlarge view of special ST-100

Special ST-100
This special ST-100 has two semi-rigid cables installed from the top flange to the sample area. It has a compact window block with (2) Polyethylene windows and (2) fused quartz windows.

Click image to enlarge view of conflat flange to ladish flange adaptor which allows an ST-100 to be installed on a UHV chamber.

Conflat flange to Ladish flange adaptor
The image shows a conflat flange/ladish flange adaptor that allows an ST-100 to be installed on a UHV chamber with a 2.75" conflat flange. Please note that while this is the easiest way to put an ST-100 onto a UHV chamber, the ST-100 will not be UHV compatible.

Click photo to enlarge view of standard window block with countersunk screw holes.  This particular photo shows a VPF-800, reference 16480, that was installed in the sample compartment of a spectrometer.  The sample compartment is rather small and standard pan-head screws on the window block would not have allowed the system to fit in the small space, thus countersunk screw holes were used to allow for flat head screws.

Standard Window Block with Countersunk Screw Holes Option
Janis Research usually uses pan-head screws on the retainers of window blocks, which add about 0.125” to each side of the window block. In cases were space is an issue, talk to your sales engineer about countersunk screw holes in the retainers so that flathead screws can be used, as shown in this photo. This option can be offered on most window blocks with o-ring sealed windows. The window block shown can be used on our model VPF-100, VPF-800, ST-100, CCS-150, CCS-100/202, CCS-100/204 and SHI-4-2.

Click image to enlarge view of a standard ST-100 cryostat with a specially modified window block.  Two of the windows are our standard diameter clear view fused Quartz and the other two are larger diameter clear view fused Quartz.  This same window block can be used on many other systems as an option. Reference 17240Click image to enlarge view of specially modified window block with two standard diameter windows and two large diameter windows. Reference 17240Click image to enlarge view of specially modified window block with two standard diameter windows and two large diameter windows. Reference 17240

Modified Window Block
The photos show a standard ST-100 with a specially modified window block. Two of the windows are our standard 1.63" diameter clear view fused Quartz. The other two windows are a special 2.63" diameter clear view fused Quartz. This window block can be used as an option on many other systems such as VPF-100, SHI-4-2, SHI-4-5, SHI-4, CCS-150, CCS-450, CCS-100/202 and CCS-100/204. (The CCS-100/204 an use an optional large window using a different window block.) Contact sales@janis.com for more information.

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