Janis Research, cryogenics, cryostats

4 Kelvin
Closed Cycle Refrigerator Systems
from Janis and SHI

Sumitomo (SHI) 4 K Refrigerator

RDK-408D2

1 Watt @ 4.2 K

These systems provide 1.0 Watt of cooling at a temperature of 4.2 K at the second stage, and can reach a minimum temperature of 3 K (with no parasitic or experimental heat loads).  Compact water- or air-cooled compressors and 6-meter long flexible gas lines complete the refrigerator package. (Please see our Compressors page for more information.) Designs incorporating both refrigerator and cryostat are available for a variety of applications.

Characteristics: Applications:
Refrigeration Capacity 1 W @ 4.2 K Superconducting Magnet Cooling
Orientation Independent Cryogenic Property Measurements
Push-button Operation   Cryopumps  
Cryogenic Shield Cooling
Helium Recondensing
Laboratory Cryostats  

COLD HEAD MODEL RDK-408D2

Specifications  
Refrigeration Cycle   Modified Gifford-McMahon
Refrigeration Capacity   50/60 Hz        1st stage:    40/50 W @ 43 K 
(Vertical Position)                      2nd stage:  1.0 W @ 4.2 K
Orientation Any - Capacity Loss:  Max 15%
Weight  Approximately 18 kg
Dimension 180W x 294L x 557H (mm)
Maintenance Interval 10,000 hours
Compatible Compressor Unit Model CSA-71A
  F-50L
  F-50H

Specifications subject to change without notice.

Please click here to download the RDK-408D2 drawing and typical load map (252 KB). 

The downloaded file will be in PDF format which is viewable and printable with Acrobat Reader, a free plug-in utility from Adobe.  To download the free acrobat plug-in software click here.

 

Table of Contents

Pages
Introduction 1
Sample in Vacuum Systems (SHI-4 series) 2, 3
Sample in Static Exchange Gas Systems (SHI-950 series) 4, 5
Application-specific Models - Neutron Scattering 6
Application-specific Models - Mössbauer Spectroscopy (SHI-850 series) 7, 8
Application-specific Models - Micro-manipulated Probe Station (CCR4-MMP series) 9
Application-specific Models - FTIR Optical Spectroscopy: Low Vibration Pulse Tube (PT-950-FTIR) 10
Custom Engineered and Specialized 4 K Closed Cycle Cryostat Systems 11
0.1 Watt @ 4.2 K Refrigerator from SHI (RDK-101D) 12, 13
0.4 Watt @ 4.2 K Refrigerator from SHI (RDK-305D) 14, 15
0.5 Watt @ 4.2 K Refrigerator from SHI (RDK-205D) 16, 17
1 Watt @ 4.2 K Refrigerator from SHI (RDK-408D2) 18
1.5 Watt @ 4.2 K Refrigerator from SHI (RDK-415D) 19
6 K Cryocooler from SHI (RDK-408S) 20, 21
0.1 Watt Compressor Unit from SHI (CNA-11) 22
0.4 Watt Compressor Units from SHI (CNA-31C, CNA-31D) 23
0.5 Watt Compressor Units from SHI (CKW-21) 24
1 Watt & 1.5 Watt Compressor Units from SHI (CSA-71 & F-50) 25
Pulse Tube Refrigerators 26
 
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