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Optical Cryostat - CS202*I-DMX-1SS

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CS202SI-DMX-1SS
DMX-1SS Optical Block

The CS202*I-DMX-1SS high performance closed cycle cryostat has an all stainless steel vacuum shroud along with a welded stainless steel instrumentation skirt.

This system is capable of achieving vacuum levels of 10-7 Torr with an appropriate vacuum system. The lower vacuum reduces sample surface contamination, such as water molecules, which can be particularly detrimental to IR spectroscopy.

The nickel plated copper radiation shield provides a durable, low emissivity finish, ideal for reducing radiant heat load in low temperature experiments.

The CS202*I-DMX-1SS is powered by our DE-202 series closed cycle cryocooler. This liquid helium-free cryostat uses a pneumatically driven Gifford-McMahon cycle to extract heat from the system.

Download CS202I-DMX-1SS Data Sheet

Applications
  • Optical
  • Electro-optical
  • Raman
  • UV, VIS, IR
  • FTIR
  • Electroluminescence
  • Photoluminescence
  • Resistivity
  • Hall probe experiments
  • Diamond anvil cell
  • Deep-level transient spectroscopy (DLTS)
  • Thermal, electrical and magnetic susceptibility
  • Magneto-optical Kerr effect (MOKE)

Features
  • Cryogen free
  • Welded stainless steel construction for high vacuum
  • Large, clear-view optical windows (1.25 in.)
  • Large sample viewing angle for optical collection (F/.8)
  • Can operate in any orientation
  • Fully customizable
Typical Configuration
  • Cold head (DE-202AI)
  • Compressor (ARS-2HW)
  • 2 helium hoses
  • Welded stainless steel vacuum shroud with 5 window ports for optical and electrical experiments (DMX-1SS)
  • Nickel plated copper radiation shield
  • 2 high purity quartz windows
  • Instrumentation for temperature measurement and control:
    • 10 pin feedthrough
    • 36 ohm thermofoil heater
    • Silicon diode sensor curve matched to (± 0.5 K) for control
    • Calibrated silicon diode sensor (±12 mK) with 4 in. free length for accurate sample measurement
  • Wiring for electrical experiments:
    • 10 pin feedthrough
    • 4 copper wires
  • Sample holder for optical and electrical experiments
  • Temperature controller
Options and Upgrades
  • 4 K cold head (0.1 W @ 4.2 K)
  • 5.5 K cold head (1 W @ 10 K)
  • Turbo upgrade for faster cooldown times
  • 450 K high temperature Interface
  • 800 K high temperature Interface
  • Custom temperature sensor configuration (please contact our sales staff)
  • Custom wiring configurations (please contact our sales staff)
  • Window material upgrades (custom materials available)
  • Sample holder upgrades (custom sample holders available)

The ARS Advantage

4 K, 5.5 K, 10 K Fine-Tuned For Your Temperature Range
A Selection of ARS Manufactured Displex Cold Heads

The DE-202SE cold head is a precision machine carefully tuned to achieve temperatures below 4 K with 0.1 W of cooling power at 4.2 K.

The DE-202AEcold head is a rugged workhorse built with power and durability in mind, achieving temperatures below 9 K with 0.5 W of cooling power at 10 K.

The DE-202PE 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 1 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 36 ohm 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.

Specialized Optics For All Applications
DMX-1AL Optical Block

Window Materials for All Transmission Ranges

High purity quartz is the standard window material for most of our optical cryostats, but we have a wide variety of other window materials available, from near IR materials like CaF2 and KBr to far IR and terrahertz like Ultra High Molecular Wright Polyethylene and Picarin, to Kapton, Mylar and beryllium for x-ray experiments. If you don't see the window material you're looking for, please contact one of our sales representatives.

Optimized for Weak Signal Collection with Minimum Heat Load

The tiered optical access of the 1.25" clear view vacuum shroud window and radiation shield optical ports allows for a large cone of optical access (F/0.8) and at the same time limits the area of exposure to 300 K thermal radiation.

Low Stress Window Mounts

Our window ports are designed to gently cradle the window material, creating a low stress seal that limits optical distortions.

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 CS202*I-DMX-1SS can accept all but our largest sample holders. Like all of our cold fingers, the DE-202 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-2HW compressor that powers the DE-202 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-202 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.

DMX-1SS Specifications

Cooling Technology-
  DE-202 Closed Cycle Cryocooler
  Refrigeration Type Pneumatically Driven Gifford-McMahon Cycle
  Liquid Cryogen Usage None, Cryogen Free
Temperature*-
  DE-202AI < 10 K - 350 K
  DE-202SI < 4.2 K - 350 K
  DE-202PI < 5.5 K - 350 K
  With 800 K Interface (Base Temp + 2 K) - 700 K
  With 450 K Interface (Base Temp + 2 K) - 450 K
  Stability 0.1 K
  *Based on bare cold head with a closed radiation shield, and no additional sources of experimental or parasitic heat load.
Sample space-
  Diameter 36 mm (1.43 in)
  Height 39 mm (1.53 in
  Sample Holder Attachment 1/4-28 screw
  Sample Holder View our Sample Holder Collection
Optical Access-
  Window Ports 5 - 90° Apart
  Diameter 41 mm (1.63 in)
  Clear view 32 mm (1.25 in)
  #/F 0.8
  Window Material View our Wide Selection of Window Materials
Temperature Instrumentation and Control (Standard)-
  Heater 1 - 36ohm Thermofoil Heater Anchored on Cold Tip
  Control Sensor 1 - Curve Matched Silicon Diode
  Sample Sensor 1 - Calibrated Silicon Diode
  Custom Instrumentation Contact ARS for available Options
Instrumentation Access-
  Instrumentation Skirt Welded Stainless
  Pump out Port 1 - NW-25
  Instrumentation Ports 3
  Instrumentation Wiring Contact our sales staff for wiring options
Vacuum Shroud-
  Material Stainless Steel
  Length 338 mm (13.3 in)
  Diameter 70 mm (2.75 in) (at the sample space)
  Width 50.8 mm (2 in) (at the sample space)
Radiation Shield-
  Material Nickel Plated Copper
  Attachment Threaded
  Optical Access 0, 2, or 4(customer specified)
Cryostat Footprint-
  Overall Length 562 mm (22.12 in)
  Motor Housing Diameter 114 mm (4.5 in)
  Rotational clearance 200 mm (8 in) with "G" configuration

Cryocooler Specifications

Cryocooler Model DE-202AI DE-202A(T)I DE-202PI DE-202SI
  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 < 4.2 K < 4.2 K
    Cooling Capacity- 4.2 K - - - - - - 0.1 W 0.08 W
  10 K 0.5 W 0.4 W 0.7 W 0.56 W 1 W 0.8 W 1.2 W 1 W
  20 K 2.5 W 2 W 3.7 W 3 W 2.3 W 1.8 W 2.3 W 1.8 W
  77 K 4 W 3.2 W 6 W 4.8 W 3.5 W 2.8 W 4 W 3.2 W
    Radiation Shield Cooling Capacity 10 W 8 W 15 W 12 W 10 W 8 W 10 W 8 W
       (1st Stage Cooling Capacity at 77 K)                
    Maximum Cylinder Temperature 355 K 355 K 355 K 355 K
    Cooldown Time- 20 K 50 min 60 min 35 min 42 min 60 min 72 min 60 min 72 min
  Base Temperature 70 min 84 min 50 min 60 min 90 min 108 min 90 min 108 min
    Weight Expander 7.1 kg (16 lbs) 7.1 kg (16 lbs) 7.1 kg (16 lbs) 7.1 kg (16 lbs)
Compressor Model ARS-2HW ARS-4HW ARS-2HW ARS-4HW
    Standard Voltage Min 208 V 208 V 208 V 190 V 208 V 190 V 208 V 190 V
  Max 230 V 220 V 230 V 210 V 230 V 210 V 230 V 210 V
    Power Usage Singe Phase 1.3 kW 1.2 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 62 kg (137 lbs) 73 kg (160 lbs) 73 kg (160 lbs) 73 kg (160 lbs)
    Typical Maintenance Cycle 12,000 hours 8,000 hours 12,000 hours 12,000 hours
CS202*I-DMX-1SS Cold Head Drawing

CS202*I-DMX-1SS
Full Cryostat

CS202*I-DMX-1SS Sample Space Drawing

CS202*I-DMX-1SS
Sample Space

ARS-2HW Compressor Drawing

ARS-2HW
Compressor

Click on the images for full size.

CS202SI-DMX-1SS

Premium closed cycle optical cryostat with welded stainless steel vacuum shroud and instrumentation skirt. Shown with compressor and helium hoses.

Courtesy of: Mr. Donghyun Kim

CS202AE-DMX-AL

Installed for micro-photoluminescence experiments, with continuously adjustable sample-to-window distance for short focal length experiments.