Janis Research, cryogenics, cryostats

ST-500 Microscopy Cryostat

ST-500 Microscopy continuous flow cryostat, Janis Research, cryogenics. Click here to view image larger.

The Janis ST-500 continuous flow cryostat has been specially designed for use in microscopy, imaging, and high spatial resolution photoluminescence.  The combination of low thermal-expansion support structure and internal vibration isolation results in nanometer scale vibration and drift levels.  The cryostat geometry offers a short working distance (for use with high magnification optics), and permits mounting on common microscope stages and translators.

STANDARD CONFIGURATION

The ST-500 system includes a flexible high-efficiency variable flow cryogen transfer line.  This line delivers liquid helium or liquid nitrogen to a two-stage heat exchanger and sample mount. 
The ST-500 is portable, easily mounted in a variety of configurations, and can be used both in transmission and reflection geometries.

Other configurations include:

Please click here to view the ST-500 Microscopy Cryostat (standard configuration)
Mechanical Drawing.

Options include:

Contact us to find out how easy it is to afford one of these systems!

Standard ST-500 Specifications

Temperature range (continuous)

3.5 - 475 K (standard) 
Initial cooldown time 10 K (LHe):          25 minutes
  80 K (LN2):          30 minutes
Cryogen usage during cooldown to 4.2 K 1 L LHe
  0.3 L LN2
Temperature stability <50 mK
(with temperature controller)  
Weight  7 lbs. (3.2 kg)
(not including transfer line)  
Nominal cryogen usage LHe @ 5 K:          ~1.1 L/hr
  LN2 @ 80 K:        ~0.1 L/hr
Nominal vibrational amplitude†, ‡ ±15 nm 
Positional drift‡ ±10 nm in 5 minutes

 

±60 nm in 30 minutes

† Vibrational amplitude measured while on isolated optical table.  
   Results may vary depending on experimental conditions. 
‡ Data courtesy of B. B. Goldberg and M. S. Unlu, Departments of Physics,
   ECE and Photonics Center, Boston University.

Close up of ST-500 sample mount area. Aperture size and sample distance are customer selectable. Janis Research, cryogenics. Click here to view image larger.

Close up of sample mount area.
Aperture size and sample distance are customer selectable.

 

Long Term Drift Data

ST-500 long term drift data from University of Oxford, Janis Research, cryogenics

Data taken by K.H. Lee (University of Oxford)

The Taylor group at University of Oxford has performed some characterization of the ST-500 cryostat drift. The characterization is based on the tracking of a single QD over time, and test results indicate a typical positional drift of about 2 nm/min.

Reference: K. H. Lee, et al, "Registration of single quantum dots using cryogenic laser photolithography" Appl. Phys. Lett., 88, 193106, 2006.

 

Displacement Chart

ST-500 Displacement Chart from Boston University, Janis Research, cryogenics
Displacement Chart data courtesy of B. B. Goldberg and M. S. Unlu, Departments of Physics, ECE and Photonics Center, Boston University.
OTHER CONFIGURATIONS

Low-profile ST-500-LN microscopy cryostat. Click on photo for larger view.COMPACT AND ULTRA-COMPACT CONFIGURATIONS
Compact and ultra-compact designs are also available if space restrictions do not allow the use of the ST-500.  Click here for details on the ST-300-MS SuperTran cryostat and click here for details on the low-profile ST-500-LN microscopy cryostat.
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Special Diamond Anvil Cell (Diacell (R) CryoDAC-ST configured for use with the Janis ST-500 microscopy cryostat is available from easyLAB Technologies Ltd. Click on photo for larger view. CryogenicsOPTIONS FOR MICRO-SPECTROSCOPY TECHNIQUES
Special Diamond Anvil Cell (Diacell® CryoDAC-ST) configured for use with the
ST-500 is available from easyLab Technologies Ltd.  Click here for details.
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Close up of ST-500 with attocube stages. Click photo for larger view.NANO-POSITIONING STAGES FROM ATTOCUBE
Nano-positioning stages can be installed on the ST-500 microscope cryostats for a number of short working distance applications.  Because this design uses a standard ST-500 cryostat as a base, existing cryostats may be upgraded to the special attocube configuration.  Contact Janis for more information.
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Microscopy cryostat, Model ST-500 with sample extension for magnetic measurements. Janis Research, cryogenics. Click here to view image larger.SAMPLE EXTENSION FOR MAGNETIC MEASUREMENTS
Using the same proven cryostat design as the regular ST-500 cryostat, the ST-500 for magnetic measurements features an extended sample mount for use inside the bore of a magnet.  This extended sample mount may be purchased separately, or with a set of permanent magnets for measurements in fields of up to 0.5 T.  A set consists of up to five interchangeable magnets: the full set allows measurements in discrete steps of 0.1 T.  Existing ST-500 cryostats may be upgraded by simply ordering the special sample holder, vacuum shroud top plate and radiation shield cover.  Click here for more information.
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Special ST-500 with O-ring Sealed Top and Bottom Windows and Break Out Box, Janis Research, microscopy cryostat, cryogenics. Click here to view image larger.BREAKOUT BOX ACCESSORY FOR ELECTRICAL MEASUREMENTS
For customers requiring multiple feedthroughs for electrical measurements, Janis can build a breakout box.  The photo shown illustrates a special ST-500 with O-ring sealed top and bottom windows and breakout box.
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ST-500-UHV cryostat for microscopy with a UHV sample environment. Click photo for larger view.ULTRA HIGH VACUUM CONFIGURATIONS
ST-500-UHV cryostat for microscopy with a UHV sample environment
This continuous flow cryostat includes the same low base temperature of 3.8 K and heat exchanger design as the standard ST-500, with its low thermal drift of about
2 nm/min, and a helium consumption rate of about 1.1 L/h.  The cryostat is bakeable to 450 K and is equipped with a viewpoint configured for short working-distance measurements.  Depending on the window thickness, that distance can be as short as 1 mm; different window materials are available to suit  the required transmission range.  The cryostat design can be modified to accept internal nano-positioning stages for X-Y-Z motion.  The ST-500-UHV can be used with liquid helium or liquid nitrogen and will operate in any orientation.  Click here for more information.
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Model 6F-CF-ST-500 superconducting magnet microscopy system from Janis Research. Cryogenics.SUPERCONDUCTING MAGNET FOR HIGH RESOLUTION MICROSCOPY
Designed to operate with a Janis high stability microscopy cryostat, this system allows microscopy measurements to be performed in fields of up to 6 T.  The system comes with X-Y-Z translation stages for sample scanning and focusing, and is designed for magneto-optical imaging at helium temperatures.  Click here for details.
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Model ST-500-4LF-0-TX micro-manipulated probe station for microscopy from Janis Research. Cryogenics.MICRO-MANIPULATED CRYOGENIC & VACUUM PROBE SYSTEMS FOR CHIPS, WAFERS AND DEVICE TESTING
The Janis ST-500 series probe stations are high performance research instruments designed to provide affordable vacuum and cryogenic probing of wafers and devices.  The proven ST-500 cryostat is the platform for these probe stations, and includes low vibration technology (originally designed for high spatial resolution optical microscopy) to provide outstanding sample positional stability.  Researchers around the world are using these systems to conduct research in a wide variety of fields, including MEMS, nanoscale electronics, superconductivity, ferroelectrics, material sciences, and optics.  Click here for details.
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Table of Contents

Page
Introduction 1, 2
ST-100 Cryostat Systems 3, 4
ST-100-FTIR Cryostat Systems 5
ST-170 ESR Systems 6
ST-200 Tubular Systems 7
ST-200-NMR Tubular Systems 8
ST-300/300T Compact Systems 9, 10
ST-300-MS Compact Systems for Microscopy   11, 12
ST-400 Ultra High Vacuum Systems 13
ST-500 Microscopy Cryostat

14, 15
ST-500-LN Microscopy Cryostat

16, 17

Basic System Specifications

18

Options & Accessories

19

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