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Hall Effect Cryostat: CS202I-DMX-12

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CS202AI-DMX-12 Hall Effect Cryostat
Close up of the Optical Block on the CS202AI-DMX-12 Hall Effect Cryostat

Designed for Hall Effect measurements, magnetic property testing, magneto-optical and electro-optical measurements, the CS202I-DMX-12 is well suited for applications where the cryostat has to be placed in the narrow gap of an electromagnet and a magnetic field will be applied to the sample.

As always, the challenge in magnet systems is to shrink the vacuum shroud dimensions to fit inside the narrow gap between magnet poles, to maximize the field. ARS has taken that philosophy to heart in this Hall Effect cryostat. The profile of the vacuum shroud has been reduced to fit the cryocooler like a glove and the optical block has been reduced to allow for the smallest pole spacing.

Due to the narrow axial profile of the CS202I-DMX-12 Hall Effect cryostat, the cold finger can reach the center of most magnets without complicated extensions that reduce cooling power and increase base temperature. This allows the Hall Effect measurements to be made at the lowest possible base temperature.

Additionally, special care has been taken with the material choices in the construction of the Hall Effect cryostat. The vacuum shroud on the CS202I-DMX-12 Hall Effect cryostat is aluminum instead of the standard stainless steel and the OFHC copper radiation shield is polished instead of nickel plated. This gives the cryocooler a low magnetic signature, another characteristic essential for Hall Effect experiments.

Download CS202I-DMX-12 Data Sheet

Applications
  • Hall Effect measurements
  • Magnetic susceptibility
  • Electro-optical
  • Magneto-optical
  • UV, VIS, IR
  • Electro and photoluminescence
  • DLTS
  • Resistivity
Features
  • Narrow gap optical block, DMX-12 (1.62 in.), DMX-12B (1.37 in.)
  • No cold tip extension necessary
  • Cryogen free
  • Non-magnetic one-piece aluminum construction
  • Non-magnetic polished OFHC copper radiation shield
  • Large, clear view optical windows (1 in.)
  • Large sample viewing angle for optical collection (F/1)
  • Can operate in any orientation
  • Fully customizable
Typical Configuration
  • Cold head (DE-202AI)
  • Compressor (ARS-4HW)
  • 2 helium hoses
  • Aluminum vacuum shroud for Hall Effect measurements, with 2 window ports (DMX-12)
  • Non-magnetic OFHC copper radiation shield for Hall Effect measurements
  • 2 high purity quartz windows
  • Instrumentation for temperature measurement and control:
    • 10 pin hermetic feedthrough
    • 36 ohm thermofoil heater
    • Silicon diode sensor curve matched to (± 0.5 K) for control
    • Calibrated Cernox sensor (±5 mK at 4.2 K) with 4 in. free length for accurate sample measurement
  • Wiring for electrical experiments:
    • 10 pin hermetic 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). Contains rare earth elements that may hinder extremely sensitive measurements.
  • 6 K cold head (1 W @ 10 K). Contains rare earth elements that may hinder extremely sensitive measurements.
  • Turbo upgrade for faster cooldown times
  • High temperature interface
  • Very high temperature interface. (Not compatible with the RSD-12B radiation shield. Removal of the radiation shield will cause an increase in base temperature.)
  • 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/# = 1) 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*E-DMX-12 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-12 Specifications

Cooling Technology-
  DE-202 Closed Cycle Cryocooler
  Refrigeration Type Pneumatically Driven Gifford-McMahon Cycle
  Liquid Cryogen Usage None, Cryogen Free
Temperature*-
  DE-202AE < 10 K - 350 K
  DE-202SE < 4.2 K - 350 K
  DE-202NE < 6 K - 350 K
  With 800 K Interface (Base Temp + 2 K) - 700 K
Not Compatible with RSD-12B Radiation Shield
  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 DMX-12 28.4 mm (1.12 in),
DMX-12B 27.18 mm (1.07 in)
  Height 30 mm (1.18 in
  Sample Holder Attachment 1/4-28 screw
  Sample Holder View our Sample Holder Collection
Optical Access-
  Window Ports 4 - 90° Apart
  Diameter 38mm (1.5 in)
  Clear view 25 mm (1 in)
  #/F 1
  Window Material View our Wide Selection of Window Materials
Temperature Instrumentation and Control (Standard)-
  Heater 1 - 36 ohm Thermofoil Heater Anchored on Cold Tip
  Control Sensor 1 - Curve Matched Silicon Diode
  Sample Sensor 1 - Calibrated Cernox Sensor
  Custom Instrumentation Contact ARS for available Options
Instrumentation Access-
  Instrumentation Skirt Welded Stainless Steel
  Pump out Port 1 - NW-25
  Instrumentation Ports 2
  Instrumentation Wiring Contact our sales staff for wiring options
Vacuum Shroud-
  Material Aluminum
  Length 324 mm (12.75 in)
  Diameter 70 mm (2.75 in) (at the sample space)
  Width DMX-12 41.1 mm (1.62 in)
DMX-12B 34.8 mm (1.37 in) (at the sample space)
Radiation Shield-
  Material Polished OFHC Copper
  Attachment Threaded
  Optical Access 0, 2, or 4(customer specified)
Cryostat Footprint-
  Overall Length 547 mm (21.53 in)
  Motor Housing Diameter 114 mm (4.5 in)
  Rotational clearance 200 mm (8 in) with "G" configuration

Cryocooler Specifications

Cryocooler Model DE-202AE DE-202A(T)E DE-202PE DE-202SE
  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
Hall Effect Cryostat: DMX-12 Vacuum Shroud Drawing

DMX-12
Hall Effect Cryostat Vacuum Shroud

Hall Effect Cryostat: DMX-12 Sample Space Drawing

CS202*E-DMX-12
Hall Effect Cryostat Sample Space

ARS-2HW Compressor Drawing

ARS-2HW
Compressor

Click on the images for full size.