Products

4 Kelvin Closed Cycle Refrigerator Systems from Janis and SHI

Sample in Vacuum - SHI-4 Series

Overview

Click button below to enlarge view of SHI-4-5 4 Kelvin closed cycle refrigerator from Janis Research and Sumitomo (SHI).  This particular model SHI-4-5 has an extra 10-pin feedthrough (optional).  Reference 16884.

Janis SHI-4 series cryostats are among the most versatile systems available for laboratory sample cooling. They are equipped with interchangeable optics, and include provisions for a wide variety of electrical connectors. Tapped holes on the vacuum shroud and a sturdy mounting flange provide for convenient mounting in any orientation.

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Standard Configuration

Click image to enlarge view of SHI-4-2 0.2 Watt at 4.2 K closed cycle refrigerator from Janis Research and Sumitomo, SHI, cryocooler, cryogenics

Click on image to enlarge view of SHI-4-5 4 K Cryocooler from Janis Research, closed cycle refrigerators.  This particular model SHI-4-5 has an extra 10-pin feedthrough (optional).  Reference 16884

Click image to enlarge view of SHI-4 1 Watt Optical 4 K Cryocooler from Janis Research, closed cycle refrigerators

Click image to enlarge view of SHI-4-15 4 Kelvin closed cycle refrigerator system from Janis Research, cryogenic equipment, Sumitomo, SHI

SHI-4-2
0.2 Watt 4 K Optical Cryocooler

SHI-4-5
0.5 Watt 4 K Optical Cryocooler

SHI-4
1 Watt Optical 4 K Cryocooler

SHI-4-15
1.5 Watt Optical 4 K Cryocooler

Click on image to enlarge view of SHI-4T-1 non optical 0.1 Watt at 4.2 K closed cycle refrigerator with sample in vacuum from Janis Research.  Sumitomo model RDK-101D coldhead.

Click image to enlarge view of SHI-4T-800 K high temperature 4 Kelvin cryocooler from Janis Research, cryogenic equipment

Click image to enlarge view of SHI-4ST-1 sub-compact non-optical 4 Kelvin cryocooler, Janis Research, closed cycle refrigerators, Sumitomo, SHI, cryogenic equipment

Click image to enlarge view of SHI-4XG-5 Low Vibration Interface 4 K Cryocooler from Janis Research, closed cycle refrigerators

SHI-4T-1 Non-Optical 4 K Cryocooler with Optional Mounting Stand

SHI-4T with Optional 800 K High Temperature Stage

SHI-4ST-1 Sub-compact, Non-optical 4 K Cryocooler

SHI-4XG-5 Low Vibration Interface 4 K Cryocooler

Click image to enlarge view of SHI-4T-4 non-optical 4 K cryocooler from Janis Research
SHI-4T-4 Non-optical 4 K Cryocooler

Janis SHI-4 series cryostats are among the most versatile systems available for laboratory sample cooling. They are equipped with interchangeable optics, and include provisions for a wide variety of electrical connectors. Tapped holes on the vacuum shroud and a sturdy mounting flange provide for convenient mounting in any orientation.

Our Special Values page has one SHI-4-1 unit available. Click here for more details.

Click button to enlarge view of mechanical drawing for the SHI-4 series 4 Kelvin closed cycle refrigerator systems (Models SHI-4, SHI-4-15, SHI-4-5) from Janis Research, cryogenic equipmentEnlarge

Standard Optical (SHI-4-x) Configuration Mechanical Drawing
(Models SHI-4, SHI-4-15, SHI-4-5)

Click button below to enlarge view of mechanical drawing of model SHI-4-1 closed cycle refrigerator with sample in vacuum, 0.1 W at 4.2 K, from Janis Research.  Contact our sales engineers for the updated SHI-4-2 mechanical drawing, cryocooler, cryogenic research equipmentEnlarge

Model SHI-4-1 Standard Optical Cryocooler Mechanical Drawing

Click button below to enlarge view of mechanical drawing for low vibration interface (SHI-4XG-x) configuration on 4 Kelvin closed cycle refrigerator systems from Janis ResearchEnlarge

Low Vibration Interface (SHI-4XG-x) Configuration Mechanical Drawing
shows dimensions for the 0.5 W model. Other models are also available.

These cryostats are designed for measurements to 325 K, and optional configurations permit operation to 500 K or 800 K (with special thermometry).

Optimized for experiments requiring optical access to the sample, these systems include the following components:

  • Optical vacuum shroud and radiation shield
  • Four o-ring sealed quartz windows
  • Gold-plated OFHC copper sample holder
  • 10-pin electrical feedthrough, with three spare electrical access ports
  • Evacuation valve and safety pressure relief valve
  • Silicon diode thermometer and control heater
  • Easily removable window block with o-ring seal located just above the windows (SHI-4-2 and SHI-4-5 systems only)

Available options:

  • Additional electrical feedthroughs (BNC, SMA, multipin, and others)
  • Rotatable vacuum shroud
  • Rotation and positioning stages
  • Matrix isolation configuration
  • Fifth window port
  • Radiation shield windows
  • Specially modified window block with larger window as an option (SHI-4-x)
  • IR and other window materials
  • Custom designed vacuum shroud
  • 500 K & 800 K high temperature systems available on most models (800 K with special thermometry)
  • Non-optical configurations
  • Compact vacuum shroud (for use with electromagnets)
  • Large sample volume configurations

Standard models include:
("x" indicates the cooling power of the refrigerator)

  • SHI-4-x (Optical)
  • SHI-4T-x (Non-optical)
  • SHI-4S-x (Sub-compact)
  • SHI-4XG-x (Low vibration interface) 
  • CCR4-MMP (Cryogen-free probe station)

Click here to contact Janis today!

Specifications

(including radiational heat load)

  SHI-4-2 SHI-4-5 SHI-4 SHI-4-15
Temperature Range <5 K* to 325 K <4.5 K to 325 K <4 K to 325 K <4 K to 325 K
Initial Cooldown Time <120 Minutes
to 5 K
~70 Minutes
to 4.5 K
60 Minutes to 4 K 60 Minutes to 4 K
Cold Head
Cooling Power
0.13 W @ 4.2 K
(50 Hz)
0.2 W @ 4.2 K 
(60 Hz)
0.5 W @ 4.2 K 1 W @ 4.2 K 1.5 W @ 4.2 K
Cryostat Weight 36 lbs. 53 lbs. 62 lbs. 63 lbs.
Compressor Cooling Air or Water Water Air or Water Air or Water
* With four open radiation shield ports, f1 view angle.

NOTE: 500 K and 800 K versions available on most models.

Other Configurations

Special designs include:

Click image to enlarge view of special SHI-4-1 with large cold plate on the 2nd stage and cooled radiation shield windows.  Reference 15189.Click image to enlarge view of large cold plate on SHI-4-1.  Reference 15189.

Special SHI-4-1 with Very Large Cold Plate on 2nd Stage and Cooled Radiation Shield Windows
This system also has six semi-rigid cables connected from hermetic 2.92 mm feedthroughs on the instrumentation flange to the cold plate.

Click photo to enlarge view of model SHI-4H-1 high temperature 4 K closed cycle refrigerator system.Click on photo to enlarge view of model SHI-4H-1 high temperature 4 K cryocooler system.

SHI-4H-1
This model SHI-4H-1 is a high temperature (500 K) system built on a RDK-101D cold head. Show with optional mounting stand with a black anodize finish.

Click image to view enlarge photo of SHI-4R 1W 4 K cryocooler with rotatable vacuum shroud from Janis Research, closed cycle refrigerators, cryogenic equipment

SHI-4R 4 K Cryocooler with rotatable vacuum shroud
A 1W @ 4.2 K system is shown.  You can see another Model SHI-4R-1 on our Matrix Isolation page.

Click on image to enlarge view of 4 Kelvin closed cycle refrigerator with two-axis optical alignment, Janis Research, cryogenic equipment, Sumitomo, SHIClick image to enlarge view of close up of 4 Kelvin closed cycle refrigerator with two-axis optical alignment motion stages from Janis Research

4 K Closed Cycle Refrigerator with Two-Axis Optical Alignment
Janis Research Company is proud to announce rotation and positioning stages for our 4 K closed cycle sample in vacuum cryostat systems. Rotation about the cryostat access has ~0.5° resolution and a range of ±360° about the cryostat axis and rotation is only limited by the helium flexlines and electrical cables. Rotation off the cryostat access has a resolution of <0.2° and a full range of ±90° of motion. The system comes with four radiation shield windows and reaches a sample base temperature of ~4K. This system is ideal when fine optical alignment is required for experimental samples. Click on the photos below for a larger view. Click here to download a mechanical drawing of this system. (PDF 101 KB)

Click image to enlarge view of special SHI-4-5-UHV system from Janis Research, cryogenic equipment, closed cycle refrigerators, cryocoolers

Special SHI-4-15-UHV
Special 1.5 Watt system with an 8" conflat tee for an instrumentation skirt. The customer will install this system on a UHV chamber (although the system itself is not truly UHV compatible).

Click photo to enlarge view of bare RDK-415D2B cold head for high vacuum.

Special SHI-4-15-UHV
The photo shows a bare model RDK-415D2B cold head with a non-rotatable 8" CF flange and a heater block on the 2nd stage with a temperature sensor and two cartridge heaters. The system is designed to mount directly onto a user-supplied UHV chamber. This is not a "true UHV" system because baking temperature is limited to 60 degrees C; it is designed for high vacuum conditions.

Click on photo to enlarge view of special model SHI-4XG-15-UHV ultra high vacuum system that can be baked out to 500 K with exchange gas vibration isolation.  This customer plans to use the system in scanning probe microscope measurements.

Special SHI-4XG-15-UHV
This special SHI-4XG-15-UHV is a true ultra high vacuum (UHV) system that can be baked out to 500 K with exchange gas vibration isolation. This particular customer plans to use this system in scanning probe microscopy measurements. With this special system's radiation shield window configuration, it has a base temperature of 3 K.

Click image to enlarge view of UHV vibration-isolated 4 Kelvin closed cycle refrigerator system.  Reference 16120Click image to enlarge view of bottom window on UHV vibration-isolated 4 Kelvin closed cycle refrigerator system.  Reference 16120

Special SHI-4XG-15-UHV with Bottom Window
Ultra high vacuum vibration-isolated 4 Kelvin closed cycle refrigerator system

Click photo to enlarge view of SHI-4-15 with a conflat flange and heat exchangers on the 1st and 2nd stages for cooling Hydrogen gas.

Special 1.5 W System for Cooling Hydrogen Gas
Special Model SHI-4-15 with a conflat flange and heat exchangers on the 1st and 2nd stages for cooling Hydrogen gas. The end user will install this cryocooler in an existing vacuum chamber and make his own connections to his Hydrogen inlet and outlet lines.

Click photo to enlarge view of special SHI-4-15-UHV with coils wrapped around the first and second stages for cooling gas from room temperature to approximately 4 Kelvin.  These systems are used in Ion trap measurements. Reference 16221

Special 1.5 W @ 4.2 K System with Coils Wrapped around the 1st and 2nd Stages for Cooling Gas from Room Temperature to ~ 4 K
This special model SHI-4-15-UHV was used in Ion trap measurements. Janis Research provided the coldhead with the cooling coils and an instrumentation skirt. The second stage has a heater and temperatures sensor to make it a fully variable temperature system. The customer connected the cooling coils to their room temperature gas supply with the other end going into the ion trap.
Similar systems could be used in other applications to condense any gas into liquid.

Click photo to enlarge view of special SHI-4-15 with Cooled Radiation Shield Windows for operation below 3Kelvin.Click photo to enlarge close up view of cooled radiation shield windows on a special SHI-4-15 1.5 watt at 4.2 Kelvin cryocooler with an expected base temperature of 3 Kelvin.

SHI-4-15 with Cooled Radiation Shield Windows for Operation Below 3 K (Typical)
This model SHI-4-15 has optional cooled radiation shield windows. The base temperature of this 1.5 Watt at 4.2 K system is expected to reach 3 K.

Click photo to enlarge view of special RDK-415D with a conflat flange and copper tubes wrapped around each stage for cooling a gas to 4 K or less.

Special RDK-415D Coldhead
The photo shows a special RDK-415D cold head with a conflat flange and some copper tubes wrapped around each stage for cooling a gas to 4 K or less.

Click photo to enlarge view of standard window block with countersunk screw holes.  This particular photo shows a VPF-800, reference 16480, that was installed in the sample compartment of a spectrometer.  The sample compartment is rather small and standard pan-head screws on the window block would not have allowed the system to fit in the small space, thus countersunk screw holes were used to allow for flat head screws.

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” to each side of the window block. In cases were 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 model VPF-100, VPF-800, ST-100, CCS-150, CCS-100/202, CCS-100/204 and SHI-4-2.

Click image to enlarge view of specially modified window block with two standard diameter windows and two large diameter windows. Reference 17240Click image to enlarge view of specially modified window block with two standard diameter windows and two large diameter windows. Reference 17240

Modified Window Block
The photos show a standard optical cryostat with a specially modified window block. Two of the windows are our standard 1.63" diameter clear view fused Quartz. The other two windows are a special 2.63" diameter clear view fused Quartz. This window block can be used as an option on many other systems such as ST-100, 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 an use an optional large window using a different window block.) Contact sales@janis.com for more information.

Click image to enlarge view of PTSHI-4-5 with optional rotating stand.  Reference 17296

Optional Rotating Stand for 4 K and 10 K Cryocooler Systems
This model PTSHI-4-5 features an optional rotating stand that allows the user to flip the entire cryostat upside-down. This is convenient for changing samples. The cryostat itself is rather heavy and it doesn't have any flat surface that will allow it to rest upside-down by itself. Without this rotating stand, gaining access to the sample area would be very difficult and inconvenient. This particular stand is designed to hold the cryostat 50mm above the surface of an optical table but could be designed to hold the cryostat at any height specified by the customer. This stand can be used for 4 K and 10 K Cryocooler systems. Contact sales@janis.com for more information.

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