4 Kelvin Closed Cycle Refrigerator Systems from Janis and SHI
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4 Kelvin Closed Cycle Refrigerator Systems from Janis and SHI

Janis

Sample in Vacuum - SHI-4 Series

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.

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.

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)

Specifications

 

SHI-4-2

SHI-4-5

SHI-4

SHI-4-15

Temperature Range

<4 K* to 300 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 @ 60 Hz
<150 Minutes
to 5 K @ 50 Hz

~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.