Products

Custom Engineered Cryogenic Systems

Overview

R&D 100 award

In addition to our complete line of laboratory cryogenic equipment, Janis Research offers a wide range of award winning custom system design capabilities. With in-house computing facilities, computerized designs and manufacturing capabilities, Janis' experienced physicists and engineers are readily available to discuss your special requirements for any type of cryogenic application

Design Capabilities

In addition to our complete line of laboratory cryogenic equipment, Janis Research offers a wide range of award winning custom system design capabilities. With in-house computing facilities, computerized designs and manufacturing capabilities, Janis' experienced physicists and engineers are readily available to discuss your special requirements for any type of cryogenic application.  Typical examples of custom engineered projects include:

  • Cryogenic Cold Traps with single or multiple chambers for adsorption of noble gases, oxygen, nitrogen, carbon dioxide, water vapor, etc.
  • Ruggedised cryostats designed for space shuttle flights/ micro-gravity experiments and balloon borne cosmic microwave studies.
  • Focal plane array and detector cooling dewars for operation in any orientation.
  • Ultra high vacuum cryostats and superconducting magnet systems for scanning probe, atomic force and scanning tunneling microscopes.
  • Cryostats that operate from liquid helium temperatures to high temperatures (750 K or higher).
  • Custom vibration isolated systems.
  • Tensile testing and high pressure diamond anvil cell cryostats.
  • Dewars designed to ASME code, with complete structural, stress and thermal analysis.

A few examples of such systems are shown on the Custom Configurations tab of this page, with many more new systems under active design and construction. Click here to contact Janis today with your requirement!

Custom Configurations

As a world-wide leader in laboratory cryogenics, Janis has developed many custom cryogenic configurations. Many of these have been refined into a standard product line and are available from inventory.

What about your requirements? Aren't research and standard products contradictory? Your project is special and special equipment is often required.

Janis Research has the track record to back up its claim as the leader in custom cryogenics. Read below to find out about our two NASA Public Service Group Achievement Awards and our R & D 100 Award. The combination of these awards clearly states, in a manner no publicity rhetoric can, that Janis has the capability, the track record, and the will to go beyond the commonplace and provide what others cannot. The Janis Research staff has the experience and the knowledge to help even the most challenging program. Contact Janis to discuss your particular custom cryogenic problem. We will work with you to find the solution.

Click image to enlarge view of cryostat designed for the ARC Argus program, Janis Research, custom engineered cryogenic research equipment

Products for Exo-atmospheric Research and Astronomy
Under the umbrella of the custom cryogenics line, Janis Research has cooperated with NASA on several programs. This cooperation has extended over several areas of interest.

The ARC Argus program, successor to the ATLAS program, investigated the upper atmosphere from a balloon platform. (See photo to the right) Of interest to the program was the tracking of inert tracer molecules for determining direction and speed.

Click on image to enlarge view of Janis Research's NASA Public Service Group Achievement Award for the SIRTF Telescope Test Facility dewar.The Jet Propulsion Laboratory, in cooperation with Janis, produced the first viable test hardware on the SIRTF program. This project involved a mirror test and qualification operating at liquid Helium temperatures. Sponsored by the LTS&E group, Janis received a Public Service Group Achievement Award for this program.

NASA GSFC worked with Janis on the AImS camera testing requirements. Working with UMD and the GSFC Planetary Systems group, Janis developed a test enclosure to mimic the Mars environment for earth-bound terrain testing.

Click image to enlarge view of diagram of CE-FLNS system including cryostat.  capillary electrophoresis-fluorescence spectrometer, R&D 100 Award, Janis Research, Iowa State UniversityClick image to enlarge view of close up of capillary cryostat and incident laser beam, R&D 100 award, Janis Research, Iowa State UniversityR&D 100 award 

Capillary Cooling Cryostat
In 1998, Janis was awarded a R & D 100 Award for the development of a capillary cooling cryostat, allowing the disciplines of FLNS and capillary electrophoresis to be combined for the first time.

Click image to enlarge view of solid neon shielded superfluid helium cryostat for micro gravity studies in the space shuttle environment, custom engineered cryogenic systems, Janis ResearchClick on image to enlarge view of Janis Research's NASA Public Service Group Achievement Award for the Fast Alternative Cryogenic Experiment Testbed (FACET) Cryostat.

Solid Neon Shielded Superfluid Helium Cryostat for Micro Gravity Studies in the Space Shuttle Environment
In 2000, Janis received its second NASA Public Service Group Achievement Award, again from the Jet Propulsion Laboratory. This time it was for Janis' performance on the FACET program, the development of a cryostat to comply with the Shuttle Hitchhiker program and providing a platform for microgravity experimentation. This second PSGAA, for a small company, is without precedent in the history of the JPL program and perhaps in all of NASA.

Click on the image to enlarge view of NASA's high-cooling power test chamber manufactured by Janis Research, custom cryogenic research equipment

High-cooling Power Test Chamber
The chamber shown on the right is designed to provide a cryogenic work environment with an available temperature range of 20 K - 300 K. NASA intends for this chamber to become a multi-purpose instrument, capable of performing a wide variety of experiments. Initially, NASA will use the chamber to test and evaluate the performance of space qualified stepper motors. These motors will be used on rover vehicles in future Moon and Mars missions. The output of the stepper motor will be connected to a dynamometer outside the chamber, and the power, torque and other performance characteristics will be measured at various temperatures.

Click image to enlarge view of cryogenic cold trap with multiple independently controllable chambers, custom engineered cryogenic research equipment, Janis Research

Cryogenic Cold Trap with Multiple Independently Controllable Chambers

Click on image to enlarge view of down-looking detector cooling dewar, custom engineered cryogenic systems, Janis Research. Reference pages 20-23 of Intro to Laboratory Cryogenics booklet.  This MCT down-looking dewar is shown in figure 2.10. 13609

Down Looking Detector Cooling Dewar

Click image to enlarge view of ultra high vacuum (UHV) compatible optical cryostat, custom engineered cryogenic systems from Janis Research

Ultra High Vacuum (UHV) Compatible Optical Cryostat

Click image to enlarge view of ultra high stability variable temperature cryostat from Janis Research, cryogenic research equipment.  Reference 16CNDT 7265

Ultra High Stability Variable Temperature Cryostat
The photo on the right shows a special model 16CNDT ultra high stability variable temperature cryostat offering variable temperatures between 5 K and 325 K, with controllable stable temperatures that maintain a better than 1 mK stability over a ten minute period. The sample may be located either in vacuum or in a cold gas environment (top loading) depending on the application. It is also available with a high field (6 to 17 tesla) superconducting magnet, with or without optical access to the sample. Contact Janis today for more information.

Click image to enlarge view of liquid nitrogen laser cooling dewar from Janis Research, custom cryogenic research equipment

Liquid Nitrogen Laser Cooling Dewar

Click image to enlarge view of special SuperTran for MRI, ULTEM

Cryostat for High-Resolution Magnetic Resonance Imaging
The cryostat to the right was developed for intraoperative magnetic resonance imaging (MRI) by groups at Columbia University, Duke University, and DuPont. These cryostats are used to cool a set of high temperature superconducting (HTSC) radio-frequency receiver coils located near the patient or object to be imaged. 

TSC receiver coils can produce the highest resolution images for the clinician, but place stringent requirements on the cryostat used to cool the coils in order that image quality is preserved. Here a specially-designed, non-magnetic vacuum tail is used to enclose the coils. The mechanical strength of this material under evacuation is critical to proper function as the coils are placed quite close to the inner wall of the vacuum tail. The tail is also translucent and provides the operator with ability to visually position the coils with respect to the patient. The coils are thermally anchored to a non-metallic substrate, and are able to be translated via the precision manipulators at the top of the cryostat (i.e., on the right hand side of the photo). The cryostat is also easy to operate as it employs Janis' SuperTran technology.

Click image to enlarge view of X-ray diffraction vacuum shroud for closed cycle refrigerator, Janis Research.  Ref. 8711, D04-08-02CrevB

X-ray Diffraction Vacuum Shroud for Closed Cycle Refrigerator
Janis has a custom vacuum shroud for X-ray diffraction available for 4 K or 10 K closed cycle refrigerators

Click image to enlarge view of custom engineered system for Atomic Force Microscopy (AFM), Scanning Tunneling Microscopy (STM), Janis Research

Cryostats for Low Temperature System for Atomic Force Microscopy (AFM)/Scanning Tunneling Microscopy (STM)
Shown to the right is a special helium dewar supplied to Seoul National University in South Korea. This unit was to be integrated into a UHV surface analysis system which includes instruments such as an AFM/STM probe. Featuring a modular design, this cryostat required the full complement of Janis' design and manufacturing capabilities—all at a cost far below our competitors.

Click image to enlarge view of Scanning Tunneling Microscopy (STM) superconducting magnet with optical access, Janis Research, cryogenic research equipment, Omicron

Scanning Tunneling Microscopy (STM) Superconducting Magnet System with Optical Access
An 8 T split superconducting magnet system has been designed and built for a Scanning Tunneling Microscope with optical access to the microscope cooling stage. The microscope is top loaded into a UHV space that can be baked out to a temperature of 150 degrees Celsius without affecting the superconducting magnet or the rest of the cryostat. The system offers variable temperatures from below superfluid helium temperatures up to room temperature. Several variations are available on this basic design, enclosing bottom optical access, cryostats for Scanning Near Field Optical Microscopes, Atomic Force Microscopes, etc.

Click image to enlarge view of Model 3TL-STL-XRAY split superconducting magnet with a Rigaku X-ray generator and Theta/Theta wide angle goniometer, Janis Research, custom engineered cryogenic research equipment

Superconducting Magnet System for use with Rigaku X-ray Generator and Theta/Theta Wide Angle Goniometer
Shown to the right is a superconducting magnet system for use with a Rigaku X-ray generator and Theta/Theta Wide Angle Goniometer. The sample is placed in a high magnetic field (0 to 40,000 Gauss) and its temperature can be varied between 2.5 and 300 K. The sample can be introduced into the high field region and located precisely with the aid of a UHV compatible translation stage. Samples can be changed without disturbing or warming up the magnet or the dewar that contains it.

Two side looking windows offer a wide angle X-ray beam path to the sample (traveling in vacuum), allowing access to the incoming and diffracted beams through angles of 0 to 38. The compact design allows the magnet system to fit precisely within the confines of the X-ray generator and goniometer.

The complete system includes heaters, field independent thermometry, an automatic temperature controller and a superconducting magnet power supply for charging and discharging the magnet. A high efficiency helium transfer line is also included for continuous cool down of the sample.

Room-temperature vacuum chamber made from CCS-150 instrumentation skirt.  It has an anti-reflection coated window installed on top, two ten-pin feedthroughs, and a thermocouple vacuum gauge.  Janis Research, cryogenic research equipmentRoom-temperature vacuum chamber made from CCS-150 instrumentation skirt.  Janis Research

Room-temperature Vacuum Chamber
Shown to the right is a room-temperature vacuum chamber made from a CCS-150 instrumentation skirt. It has an anti-reflection coated window installed on top, two ten-pin feedthroughs, and a thermocouple vacuum gauge.  This can be used to make electrical and optical measurements under a vacuum at room temperature.

Detector Cooling Systems Overview
With an extensive range of field-proven designs and a worldwide installation base, Janis Research DCD-series dewars represent the state-of-the-art in detector cooling. Constructed of stainless steel shells for maximum structural and vacuum integrity and, where possible, aluminum components for minimized weight, these systems combine fast cooldown with reliable vacuum-tight operation. Systems are available in both closed and open cycle configurations and are suitable for use in a variety of military, commercial and research applications. Janis Research offers several series of detector cooling dewars, which are listed below.

System assembly and integration is carried out in a cleanroom environment and in accordance with approved quality assurance procedures. A wide selection of options and accessories is available, including: LN2 autofill systems, multi-filter wheel inserts, automatic temperature controllers, the Janis Research MSV-1 00 all metal-sealed valve, complete documentation packages, etc.

Janis can provide complete customized systems, with services ranging from design analysis to prototype development and manufacture of production units.

Typical applications include IR detector arrays, IR cameras, CCD cooling, FTIR spectroscopy, medical imaging and microwave devices.

Click image to enlarge view of model DCD-100 closed cycle detector cooling dewar from Janis ResearchClick image to enlarge view of mechanical drawing for model DCD-100 closed cycle detector cooling system from Janis Research, cryogenics

Detector Cooling Dewar Model DCD-100 Closed Cycle Cooled System
When space or availability constraints make the use of liquid cryogens impractical, a Janis Research DCD-100 series closed cycle system is the solution. Featuring stainless steel construction and fully integrated split Stirling cycle cryocoolers, these systems provide cold finger temperatures as low as 65 K in a compact, rugged and field-proven package. A proprietary Janis Research metal seal cryogenic valve eliminates the need for elastomer seals, thus providing enhanced vacuum hold times and system flexibility. Systems are typically bakeable to 80 ºC -- actual limits are determined by the characteristics of the detector package. All systems are fully tested prior to shipment; test results and complete documentation packages are available.

Custom-sized vacuum shells and refrigerator mounting arrangements are available, as is integration with all commercially available Stirling cycle cryocoolers. Standard elastomer-sealed valves, as well as fixed and demountable pinch-offs may also be used.

Features include:

  • Rugged stainless steel construction ensures structural and vacuum integrity
  • May be configured with any commercially available Stirling cycle cryocooler
  • Available with metal seal valve
  • May be customized to meet a variety of size, weight and performance requirements
  • Operable in any orientation
  • Bakeable to 80 ºC (without detector)
Click image to enlarge view of model DCD-200 liquid nitrogen cooled detector cooling dewar from Janis ResearchClick image to enlarge view of mechanical drawing for model DCD-200 liquid nitrogen cooled detector cooling dewar from Janis Research

Detector Cooling Dewar Model DCD-200 Liquid Nitrogen Cooled System
Open cycle systems are the appropriate choice for vibration-sensitive applications and for those requiring more economical cooling. Utilizing liquid nitrogen (LN2) in either pourfill or autofeed configurations, these systems have no moving parts and, thus, none of the mechanical vibration inherent to closed cycle systems. Cryogen hold times in excess of 8-12 hours are typical - actual hold times will vary with dewar size and heat loads. All system integration is carried out under cleanroom conditions and in accordance with approved quality assurance procedures. All systems are fully tested prior to shipment; test results and complete documentation packages are available.

Features include:

  • Rugged stainless steel construction ensures structural and vacuum integrity
  • Optional multi-filter wheel assembly provides maximum operational flexibility
  • May be configured with a variety of windows, electrical feedthroughs, etc.
  • May be customized to meet a variety of size, weight and performance requirements
Click image to enlarge view of model DCD-300 compact detector cooling dewar from Janis ResearchClick image to enlarge view of mechanical drawing for model DCD-300 compact detector cooling dewar from Janis Research

Detector Cooling Dewar Model DCD-300 Compact System
The DCD-300 series of open cycle LN2-cooled systems features compact size, rugged stainless steel construction and hold times as long as 12 hours in an economical and easy-to-use package. Long the choice for laboratory use, the DCD-300 is adaptable to a variety of commercial applications, including: FTIR spectroscopy, industrial process control, microwave device cooling, etc. A proprietary heat exchange mechanism (not shown in drawing) provides greatly reduced cooldown times and coldfinger temperatures as low as 60 K. An optional autofill system allows unattended operation for extended periods. These compact systems are also available in bottom-looking and nitrogen-shielded LHe configurations.

All system integration is carried out under cleanroom conditions and in accordance with approved quality assurance procedures. All systems are fully tested prior to shipment; test results and complete documentation packages are available.

Features include:

  • Rugged stainless steel construction ensures structural and vacuum integrity
  • Optional autofill system allows unattended operation for extended periods
  • May be configured with a variety of windows, electrical feedthroughs, etc.
  • May be customized to meet a variety of size, weight and performance requirements 
Click image to enlarge view of model DCD-400 rotatable detector cooling dewar from Janis ResearchClick image to enlarge view of mechanical drawing for model DCD-400 rotatable detector cooling dewar from Janis Research

Detector Cooling Dewar Model DCD-400 Rotatable Liquid Nitrogen Cooled System
DCD-400 series dewars are the ideal choice for applications requiring open cycle cooling and maximum orientational flexibility. Equipped with positionable LN2 fill and vent ports, these dewars can operate over a 270º range, including upside down, without loss of performance. A stainless steel outer shell provides durability and an aluminum inner assembly minimizes weight. These systems provide typical hold times of up to 12 hours; actual hold times will vary with dewar size and operational heat loads.

All system integration is carried out under cleanroom conditions and in accordance with approved quality assurance procedures. All systems are fully tested prior to shipment; test results and complete documentation packages are available.

Features include:

  • Rugged stainless steel outer shell ensures structural and vacuum integrity, aluminum inner structure minimizes weight
  • Positionable LN2 fill and vent ports allow operation through a 270º arc without loss of cryogen or cooling performance
  • Positionable LN2 fill and vent ports allow inverted operation without loss of cryogen or cooling performance
  • May be configured with a variety of windows, electrical feedthroughs, etc.
  • May be customized to meet a variety of size, weight and performance requirements 
Click image to enlarge view of customized detector cooling dewar from Janis ResearchClick image to enlarge view of mechanical drawing of customzied liquid nitrogen cooled detector cooling dewar from Janis Research

Detector Cooling Dewar - Other Systems
Janis has designed and manufactured a wide variety of application- specific detector cooling dewars meeting the most difficult of operational specifications, including:

  • A LN2-cooled/autofilling system for use in a lab-based spectrometer
  • A continuous fill LN2 system for use in an industrial FTIR spectroscopy system
  • A vapor-shielded LHe system for industrial R&D applications
  • An FTIR spectroscopy system featuring a unique 8-position, rotatable sample holder

Janis' full range of engineering analysis and design capabilities, combined with extensive cryogenic system fabrication and testing experience, results in optimized system performance. Most DCD-series systems can be modified with respect to size, optical and electrical access, LN2 reservoir size (open cycle systems), vacuum valving, etc... In addition, prototype systems designed to customer-supplied specifications are also available.

Options and Accessories include:

  • Liquid level sensor-based autofill system
  • Storage dewar-based autofeed system
  • Multi-filter wheel assembly
  • Metal seal valves
  • 8-position rotatable sample holder
  • Temperature controllers/thermometry
  • Wide range of window sizes and materials
  • Wide range of electrical feedthroughs
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