ST-100 optical cryostat

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.

Standard configuration

ST-100 SuperTran Continuous Flow Sample In Vacuum Cryostat drawing

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

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

Typical applications:

Contact us today!

Janis — a Lake Shore Company
ST-100 optical cryostat

ST-100 specifications

Temperature range~2 K to 500 K (>700 K optional)
Initial cooldown time15 min
Nominal temperature stability (with controller)50 mK or less
Orientationany position (with increased helium consumption)
System weight (without transfer line)10 lb (4.6 kg)
Cryogen consumption on cooldown0.4 L LHe (325 to 4.2 K)
0.1 L LN2 (325 to 77 K)
Nominal cryogen consumption rate0.6 L/h LHe (5 K)
0.1 L/h LN2 (100 K)
NOTE: Specifications do not include optical or experimental heat loads and assume vertical orientation.
Specifications may change depending on the length of the transfer line flexible section.

Typical Cryogen Consumption of Optical SuperTran Cryostats

SuperTran LHe consumption rate

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


Optional configurations

Photoluminescence of InGaAs/GaAs quantum dots using the HORIBA Scientific photoluminescence (PL) system with Janis cryostat

ST-100 config Photoluminescence of InGaAsGaAs Quantum Dots

Special ST-100 SuperTran with rotatable vacuum shroud for matrix isolation

ST-100 Matrix Isolation

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.ST-100 Special top ST-100 Special

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 in 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.Conflat flange to Ladish flange adaptor

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 in into each side of the window block. In cases where 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 models VPF-100, VPF-800, ST-100, CCS-150, CCS-100/202, CCS-100/204, and SHI-4-2.Window Block with Countersunk Screw Holes

Modified window block

These photos show a standard ST-100 with a specially modified window block. Two of the windows are our standard 1.63 in diameter clear view fused quartz. The other two windows are a special 2.63 in 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 use an optional large window using a different window block.) Contact for more information.Modified Window Block Modified Window Block close-up Modified Window Block close-up sample area