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DE-204 Cryocooler Series

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DE-204*F Closed Cycle Cryocooler
CS204*B True UHV Closed Cycle Cryostat with Vibration Dampening

The DE-204 is our midrange cryocooler. The extra cooling power comes in handy for systems with multiple windows or with a large number of wires. The modest price difference between the DE-202 and the DE-204 also makes the DE-204 a worthwhile investment if you want more options for future expandability and upgrades.

ARS manufactures both the cryocooler and the laboratory interface allowing for seamless trouble-free integration of our laboratory systems.

Download ARS Cryocooler Data Sheet

The DE-204F is just the bare cold head geared towards OEMs and system builders who prefer to build their own custom laboratory interface.

Our DE-204 cryocoolers are typically equipped with an instrumentation skirt, either bolt-on aluminum (DE-204*E) or welded stainless steel (DE-204I), with our unique double o-ring design that allows for easy attachment, alignment, and removal of the vacuum shroud. The instrumentation skirt acts as the interface to the vacuum chamber and environment. This is where you have the vacuum sealing surface along with instrumenation for either electrical, liquid, or gas feedthroughs.

The DE-204E is the economy instrumentation skirt that is bolted to the flat flange of the cryocooler. It has a rubber o-ring that is used as a sealing surface between the cylinder and the base of the skirt. This economy skirt is made out of aluminum and comes equipped with a vacuum pumpout port along with two instrumentation ports. The laboratory skirt interfaces with the vacuum shroud by double o-ring which allows for rotation and alignment under vacuum.

The DE-204I is the high performance instrumentation skirt. This skirt is made out of stainless steel and is welded directly to the cylinder of the cryocooler. This welded, all stainless steel construction allows for a high vacuum sample. Vacuum levels of 10-8 Torr can be achieved with a stainless steel shroud.

The ARS manufactured DE-204B is a true UHV cold head (10-11 Torr) where all of the rubber o-ring seals have been replaced with welded joints and metal seals.

Click here to see more Advanced Research Systems cryocoolers.

Features

  • Cryogen free
  • Displex® pneumatically driven Gifford-McMahon closed cycle cryocooler designed for low sample vibrations
  • Simple efficient design with only 2 moving components for high reliability
  • Easy field maintenance
  • Low life cycle cost
  • Water cooled ARS-4HW compressor for quiet and clean operation

Standard Components

  • Cold head (DE-204AF)
  • Compressor (ARS-4HW)
  • 2 helium hoses

Options and Upgrades

  • 4 K cold head (0.2 W @ 4.2 K)
  • 5.5 K cold head (3 W @ 10 K)
  • Turbo upgrade for faster cooldown times
  • 450 K high temperature interface
  • 800 K high temperature interface

The ARS Advantage

4 K, 6 K, 10 K Fine-Tuned For Your Temperature Range
A Selection of ARS Manufactured Displex Cold Heads

The DE-204SE cold head is a precision machine carefully tuned to achieve temperatures below 4 K with 0.2 W of cooling power at 4.2 K.

The DE-204AE cold head is a rugged workhorse built with power and durability in mind achieving temperatures below 9 K with 2 W of cooling power at 10 K.

The DE-204PE cold head is a hybrid of the the 4 K and 10 K philosophies achieving a balance that exhibits the best of both worlds, with temperatures below 5.5 K and 3 W of cooling power at 10 K.

High Temperature Options
800K Interface Manufactured by ARS

Our high temperature interfaces use a unique combination of mechanical and thermodynamic properties to create a high temperature thermal disconnect between the cold head and the sample space. This allows for heating of the sample space far in excess of the maximum 355 K temperature of our cryocoolers.

450 K The Easy Way

Our 450 K interface is a simple semi-permanent addition to the cold tip that expands the upper sample temperature range by 95 K utilizing most of the same instrumentation as our standard cryocoolers.

800 K - Pouring on the Heat

Our specially designed 800 K interface goes beyond the standard techniques to provide a unique system that maximizes thermal conduction at low temperatures while minimizing heat transfer at high temperatures. Beyond the safe operating temperature of silicon diodes, the standard sensors are replaced with E-type thermocouples and platinum RTDs.

Wired the Right Way - Your Way
Thermally Anchored Sensor Wiring on the DE-202 Cold Tip

Our technicians painstakingly wrap each cold head for optimum thermal anchoring. We offer you the choice of a variety of wiring options, from our standard offerings of single strand copper and low noise coaxial wiring packages to any number of custom wiring configurations.

Typical instrumentation for temperature measurement and control include one 50 thermofoil heater, one curve matched silicon diode for rough temperature control, and one free length calibrated diode for direct attachment to the sample or sample holder for accurate temperature measurement. Silicon diode sensors are favored heavily for most standard applications because of their low cost, durability, and stability, but we do offer a wide variety of other sensors for different applications such as Cernox sensors for high magnetic fields, E-type thermocouples for 4 K-800 K measurements, and platinum RTDs for accurate high temperature measurements.

Our wide selection of wiring and instrumentation is matched by an equally wide selection of temperature controllers from Cryocon, Lake Shore, and Scientific Instruments.

A Sample Holder for Every Measurement
SHOE-1C Sample Holder for Optical and Electrical Experiments

Whether the measurement is optical or electrical in nature, the sample large or small, we have a sample holder for almost any measurement. The CS204 can accept all but our largest sample holders. Like all of our cold fingers, the DE-202*4 has a 1/4-28 threaded hole on the cold tip to mount the sample holder. So even if you do not find what you need from our wide variety of sample holders there is always the option of attaching a custom sample holder.

Water Cooled Compressor For Your Convenience
The ARS-2HW Compressor

The water cooled ARS-4HW compressor that powers the DE-204 Series cold heads has many benefits that are amplified in small laboratory settings. The water cooling redirects heat energy that would otherwise be dumped into the lab by a large cooling fan. The lack of a large cooling fan also dramatically reduces the noise of these compressors (only 60 dBA). Additionaly with minimum air circulation, the air currents and dust are kept to a minimum. The high efficiency heat exchanger results in low water usage and saves space inside the compressor, giving it a small footprint. When water is not available our Coolpac™ remote recirculation system can send cooling water from up to 100 feet away.

Easy Do-It-Yourself Maintenance
DE-202 Disassembled for Service

The ARS DE-204 Closed Cycle Cryocooler operates on a pneumatically driven Gifford-McMahon refrigeration cycle that is both mechanically simple and robust.

12,000-Hour Maintenance Cycle

Over time the internal components of the cold head begin to wear. Eventually the performance of the cold head will decline and some time after 12,000 hours certain internal components need to be replaced or refurbished. With most closed cycle cryocoolers the only option is to send the cold head back to the manufacturer for service.

A Second Option

The simplicity of the ARS pneumatically driven cryocooler allows for another option. Our customers can purchase a service kit for our 10 K and 5.5 K cryocoolers that replaces all of the worn components. This service kit can be ordered ahead of time and reduce down time to a matter of hours instead of weeks.

Cryocooler Specifications

Cryocooler Model DE-204AE DE-204A(T)E DE-204PE DE-204SE
  Frequency 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz
    Base Temperature < 9 K < 9 K < 9 K < 9 K < 5.5 K < 5.5 K < 4 K < 4 K
    Cooling Capacity- 4.2 K - - - - - - 0.2 W 0.16 W
  10 K 2 W 1.6 W 2.7 W 2.2 W 3 W 2.4 W 4 W 3.2 W
  20 K 9 W 7.2 W 12 W 9.6 W 8 W 6.4 W 8 W 6.4 W
  77 K 17 W 14 W 23 W 18.4 W 14 W 11 W 14 W 11 W
    Radiation Shield Cooling Capacity 18 W 14 W 24 W 19 W 18 W 14 W 18 W 14 W
       (1st Stage Cooling Capacity at 77 K)                
    Maximum Cylinder Temperature 355 K 355 K 355 K 355 K
    Cooldown Time- 20K 30 min 36 min 25 min 30 min 40 min 48 min 40 min 48 min
  Base Temperature 60 min 72 min 50 min 60 min 90 min 96 min 90 min 108 min
    Weight Expander 7.7 kg (17 lbs) 7.7 kg (16 lbs) 7.7 kg (16 lbs) 7.1 kg (16 lbs)
Compressor Model ARS-4HW ARS-4HW ARS-4HW ARS-4HW
    Standard Voltage Min 208 V 208 V 208 V 190 V 208 V 208 V 208 V 190 V
  Max 230 V 220 V 230 V 210 V 230 V 220 V 230 V 210 V
    Power Usage Singe Phase 3.6 kW 3.0 kW 3.6 kW 3.0 kW 3.6 kW 3.0 kW 3.6 kW 3.0 kW
    Dimensions: L 483 mm (19 in) 483 mm (19 in) 483 mm (19 in) 483 mm (19 in)
  W 434 mm (17.1 in) 434 mm (17.1 in) 434 mm (17.1 in) 434 mm (17.1 in)
  H 516 mm (20.3 in) 516 mm (20.3 in) 516 mm (20.3 in) 516 mm (20.3 in)
    Weight Compressor 73 kg (137 lbs) 73 kg (160 lbs) 73 kg (137 lbs) 73 kg (160 lbs)
    Typical Maintenance Cycle 12,000 hours 8,000 hours 12,000 hours 12,000 hours

Heat Load Map

DE-204 Cryocooler Family Head Load Map

Vibration Levels

DE-204 Closed Cycle Cryocooler Vibration Levels
DE-204*F Flat Flange Cryocooler

DE-204*F
Flat Flange Cold Head

DE-204*I Closed Cycle Cryocooler with a Welded Stainless Steel Instrumentation Skirt

DE-204*I
Welded Stainless Steel Instrumentation Skirt

DE-204*B True UHV Closed Cycle Cryostat

DE-204*B
True UHV Instrumentation Skirt

Click on the Images for full size


Courtesy of:
Prof. Steve Collins,
Beamline I16 Diamond Light Source


CS202SK-DMX-2D

4 K closed cycle cryostat installed on a Newport Kappa Goniometer for x-ray diffraction experiments. This cryostat was fitted with beryllium domes for 2 pi steradian access.