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Since 1961 Janis Research Company has been providing the scientific and technical community with the highest-quality cryogenic equipment for research, characterization, and industrial applications. Over the years, our family of customers has grown to include some of the world's largest corporations and best-known research centers and institutions. The reasons for this record of success are simple: precision engineering and quality manufacturing; ease-of-operation; day-after-day reliability and performance; and a level of service and support unmatched in the industry.

Janis Research recognizes that obtaining a cryogenic system represents a long-term commitment for most scientists; therefore, we are devoted to providing you with the highest level of quality and customer support.  Just a few of the ways we accomplish this are:

  • Sales and service are provided through a worldwide network of trained and knowledgeable representatives.

  • A dedicated Janis Research sales engineer is responsible for each system from conceptual design through post-installation support.

  • A stable workforce draws on decades of combined service, and applies this experience to the assembly of each cryogenic system.

  • Customer approval of the final design drawing is obtained for all customized systems.

  • Records on all systems, modifications and design improvements are meticulously maintained for the reference of any future user.

  • Turnkey systems are supplied by offering a full line of cryogenic accessories.

  • Each system is fully integrated and tested before shipping.

 

PRODUCTS

Overview 

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.

  • Solid or liquid Neon shielded helium cryostats for ADR and superfluid helium experiments.

  • 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!

 

 Product Matrix

  

Accessories and Ancillary Equipment

Janis stocks a full range of accessories and spare parts for all your cryogenic needs. We can supply a complete cryogenic system that is fully integrated and tested, thus avoiding compatibility problems when the system reaches your lab.

Flexible Helium Transfer Lines
Liquid helium transfer lines to suit virtually any laboratory arrangement can be supplied, with standard designs in stock for fast delivery.

Liquid Helium Storage Dewars and Accessories
Storage dewars for liquid helium are available, along with accessories for measuring the liquid level inside the dewar.

Liquid Nitrogen Storage Dewars
Storage dewars for liquid nitrogen are available.

Mechanical Pumping Stations
A range of mechanical pumping stations are available to suit all cryogenic requirements, from small pumps for roughing out vacuum jackets, to large capacity hermetically sealed pumps for pumping on liquid helium. Pumps can be supplied either with or without a liquid nitrogen cold trap.

High Vacuum Pumping Stations
Turbomolecular pumps suitable for pumping vacuum jackets to high vacuum are available. These pumping stations are available with either a mechanical or a dry diaphragm backing pump, and come with a wide range vacuum gauge and other accessories.

Temperature Controllers
Temperature controllers with a wide range of functions, input types and computer interfacing are available and can be selected to match your experimental complexity and budget.

LHe & LN2 Level Indicators
A variety of cryogen level indicators are available. If you do not have a preferred model, Janis will supply the indicator most appropriate for your system.

Cryostat Accessories
Accessories for adapting your new Janis cryostat to your existing laboratory are available, as well as accessories for the maintenance and operation of existing cryostats.  Among the items you will find on this web page are sample holders, sample positioners, windows and greases.

Parts List
Parts (and their re-order numbers) to complement your existing Janis system are available. Items include epoxies, greases, electrical feedthroughs and connectors, ladish equipment, indium wire, special sample holders, heater kit, wire, and cryostat installed wiring

 Custom Engineered Cryogenic Systems

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.

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.

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.

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.

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.

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.

     

Cryogenic Cold Trap with Multiple Independently Controllable Chambers

    

Down Looking Detector Cooling Dewar

    

Adiabatic Demagnetization Refrigerator

 

Ultra High Vacuum (UHV) Compatible Optical Cryostat

 

Ultra High Stability Variable Temperature Cryostat

  
The photo on the right shows an 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 about this latest development in ultra high stability variable temperature cryostat systems.

Liquid Nitrogen Laser Cooling Dewar

 

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.

    

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.

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.

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

  
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.

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)

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

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 

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 

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

 Cryocoolers

 

Janis Research offers a variety of cryocoolers.  Contact a Janis sales engineer for help in selecting the system that is right for your application and budget.  Please click here for more information on the three main differences between Pulse Tube and Gifford-McMahon cryocoolers.

 Ultra Low Temperature Systems

 

Janis Research offers a complete family of ultra low temperature cryogenic products including dilution refrigerators, 3Helium systems, and ADR cryostats. Standard system designs are on hand for review and modification to fit virtually all experimental requirements and constraints.  

To discuss your needs in ultra-low temperatures in more detail, contact Janis today. A list of references is available upon request.

Ultra Low Temperature System Guide

 3HeliumDilution
Refrigerator
Adiabatic
Demagnetization
Refrigerator
Base Temperature (mK)300 - 600*9 - 17*50
Cooling Power at 100 mK (µW)*100 - 550N/A
Top loading sample accessStandard designAvailable as an optionN/A
Sample in liquidStandard designAvailable as an optionN/A
Sample in vacuumStandard designStandard designStandard design
UHV environmentStandard designStandard designN/A
Magnetic field compatibleStandard designStandard designN/A
Insertable systemStandard designStandard designN/A
Mixing chamber with silver heat exchangerN/AStandard designN/A
Silver heat exchangersN/AStandard designN/A

Standard design Standard design   
Available as an option Available as an option
* Depending on model

 Special Values

SPECIAL VALUE model SHI-4-1 optical cryostat system with sample in vacuum as shown in drawing D050306B featuring:

Temperature range: ~4.2 K - 300 K (four radiation shield ports covered)
< 5 K - 300 K (four radiation shield ports open)
Initial cooldown time: 90 minutes to 5 K
Cooling power: 0.1 watt at 4.2 K (2nd stage), 5 watts at 60 K (1st stage) (Bare cold head)
Power requirements: 100, 120, 230, 240 VAC, 1 Phase, 50/60 Hz, 1.2 kW
Compressor size: 385 mm x 529 mm x 610 mm high, 75 kg
Recommended maintenance interval: Cold Head: 10,000 hours, Compressor: 30,000 hours
Orientation: Free (Cooling Capacity Loss: maximum 30%)
(Specifications exclude radiational or experimental heat load, and are rated at 60 Hz)

The system includes:

  • RDK-101D two stage cold head and 3 meter flexlines; 

  • Cold head control cable (6 meter), wrenches, and operating manual;

  • CNA-11C air-cooled compressor with full charge of high-purity helium gas;

  • Cold finger with copper sample mount, 50 ohm control heater and provision for a temperature sensor;

  • 2.13" O.D. Gold plated OFHC Copper optical radiation shield mounted on the first stage;

  • 2.88" O.D. vacuum shroud with a 3.0" square window block and four (4) 1.50" diameter clear view, o-ring sealed, quartz windows;

  • Instrumentation skirt with one (1) 10-pin electrical feedthrough for heater and temperature sensors,
    three (3) blank feedthrough ports, an evacuation valve and a safety pressure relief valve;

  • Gold plated OFHC copper optical sample holder with provision for temperature sensor;

  • One (1) standard curve silicon diode temperature sensor installed at the control heater;

  • Aluminum mounting stand with four (4) support legs.

Lead time: 6 weeks ARO

This system will include a completely new SRDK-101D-A11C cryocooler. The cryostat parts that Janis installs on the RDK-101D cold head have been used as a trade show exhibit have some cosmetic imperfections. However, the system is fully functional and the overall system comes with a standard full 12 month warranty from Janis.

SHI-4-1
 

 

6 month warranty

Click here to download the VNF-XG mechanical drawing.  (54 KB) PDF

Optical liquid nitrogen cryostat with sample in static exchange gas and temperature range ~80 K - 300 K.

Hold time between refills varies from 3 – 6 hours depending on operating conditions.

This unit is excess inventory and includes:

  • 1.0" O.D. sample tube with evacuation valve, and safety pressure relief valve; with 0.75" diameter sample mount, 25 ohm control heater;

  • Outer vacuum shroud with 10-pin electrical feedthrough for heater and sensor wires, evacuation valve, and safety pressure relief valve;

  • 3.25" square window block, five (5) 1.25" diameter clear view o-ring sealed quartz windows;

  • Five (5) 0.63” diameter clear view indium sealed blank ports on the sample tube;

  • Adjustable sample positioner assembly allowing sample rotation and translation with one (1) 8-pin feedthrough for heater and temperature sensor on the sample mount, one (1) 10-pin feedthrough and two (2) blank ports and a sample mount with a 25 ohm heater and a temperature sensor;

  • Gold plated OFHC copper optical sample holder with provision for temperature sensor;

  • One (1) standard curve silicon diode thermometer installed at the control heater.

 VNF-XG

 

This sample positioner is excess inventory and designed to fit a Model STVP-100 cryostat with a sample tube diameter of 1.50”. This is an adjustable sample positioner which allows sample rotation and translation. The crown of the sample positioner includes one (1) 8-pin electrical feedthrough for heater and thermometer wiring, one (1) 10-pin electrical feedthrough, and two (2) blank feedthroughs and connects to the sample tube via a 2.0” ladish flange. The copper sample mount has a 25 ohm wound heater and a standard curve silicon diode thermometer installed. A gold plated OFHC copper optical sample holder is attached to the sample mount.

Please contact your Janis representative to ensure this sample positioner will fit your STVP system.