Products
JDry Series Cryogen Free Dilution Refrigerators
Overview
Janis Research offers cryogen free dilution refrigerators. The JDry series provide convenient and affordable cooling of samples and devices at ultra low temperatures.
Standard Configuration
The Janis JDry series provides convenient and affordable cooling of samples and devices to temperatures ~10 mK, with cooling power greater than 400 µW at 100 mK. The system uses a pulse-tube mechanical cryocooler, eliminating the need for liquid cryogens. Based on the modular Janis JDR technology, the JDry series brings a new level of simplicity and reliability to research applications requiring mK temperatures.
Standard Features
- Standard pulse-tube pre-cooling to 3 K – no cryogens required
- Manually actuated mechanical heat-switch
- Mixture condensing with built-in JT stage at pressure <1 bar absolute – no compressor required
- Standard JDR CORE installed into standard vacuum enclosure
- Resistive temperature sensors installed on all stages with proper wiring and heat-anchoring, including Janis
- Resistive Sensor (JRS1000) calibrated down to 10 mK
- Automated gas handling system (GHS2) with oil-free pumps, electromagnetic valves, cRIO controller, color touch-panel and integrated LSCI 370S Resistance Bridge
- 32 shielded manganin wires in twisted pairs, installed and thermally anchored for experimental applications
- Optimized 3He-4He mixture included
Options
- Various models of vapor-shielded helium dewars, including superefficient
- Top- or bottom-loading superconducting magnets, including vector and split-magnets
- Helium-cooled or cryogen-free superconducting magnets
- Automated heat-switch with step-motor driver
- Manual Gas Handling Systems GHS1
- Oil-free pumps, including Roots and turbo models
- Normal and superconducting RF wires in shielded twisted pairs down to mixing chamber
- High frequency (up to 40 GHz) cables down to mixing chamber
- Sample-into-vacuum delivery manipulators
- Self-calibrating CMN and FPD thermometry down to 7 mK with read-out
- Remote motor
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Specifications
| Model Name | Guaranteed Base Temperature | Guaranteed Cooling Power at 100 mK |
| Model JDry-100 | 20 mK | 100 micro-watt |
| Model JDry-250 | 12 mK | 200 micro-watt |
| Model JDry-500 | 10 mK | 400 micro-watt |
| Model JDry-750 | 9 mK | 500 micro-watt |
Chart of Model JDry-100 Cooling Power
Chart of Model JDry-500 Cooling Power
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Other Configurations
Janis Research has designed many custom cryogen free dilution refrigerator systems. Some custom options include:
- Systems with wide range of tilting angles in 70° span
- Design can include large optical windows up to 200 mm in diameter
- Cryoperm and superconducting magnetic fields
Model JDry-100-ASTRA
Cryogen free dilution refrigerator for cosmic microwave background studies.
Model JDry-500-TLSV
Top-loading cryogen free dilution refrigerator system with sample in vacuum. Sample base temperature of 20 mK - 40 mK depending on the wires and coaxial cables installed on the sample mount.
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