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Omniplex: CS204F-FMX-19N

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Omniplex: CS204SF-FMX-19N Closed Cycle Top Loading Sample in Vapor Cryostat for magnetic  property testing, such as vibrating sample magnetometry experiments
Low Vibration Adaptation for the FMX-19 Sample in Vapor Cryostats.  Rubber Bellows Decouple the Sample from the Cold Head Vibrations

The Omniplex: CS204F-FMX-19N is a top loading, non-optical cryostat designed for magnetic property testing, such as Hall Effect, vibrating sample magnetometry (VSM) and Faraday balance experiments. An ARS-manufactured DE-204 cryocooler provides this system’s high cooling power and fast cooldown. The helium vapor it uses is particularly effective at uniformly cooling nonconductive samples.

Download CS204F-FMX-19N Data Sheet

Like all of ARS’ Omniplex systems, the CS204F-FMX-19N has adjustable radiation baffles to optimize sample temperatures, plus features that allow for quick sample change without having to shut down the cryocooler and fast initial cooldown (90 min to 20 K).

The CS204F-FMX-19N cryostat comes in a variety of sample tube diameters and lengths, so it is well suited for electrical and magnetic studies. A variety of options allow this system to be customized to fit the researcher's needs. Available options include custom tail pieces (sample space), load-lock gate valves and low vibration interfaces. We also offer a VSM adapter for VSM experiments. The sample stick can use any of the standard ARS sample holders and receive a second set of temperature control instrumentation for fine tuning of the sample temperature.

Click here to see all Advanced Research Systems sample in vapor cryostats.

Applications
  • Vibrating sample magnetometry (VSM)
  • Faraday balance
  • Resistivity
  • AC susceptibility experiments
  • Hall probe experiments
  • Non-optical
Features
  • Cryogen free GM cooler
  • Top loading sample in vapor
  • Fast sample change
  • VSM adapter option
  • Welded stainless steel construction
  • Multiple tail piece adaptations
  • Fully customizable
Typical Configuration
  • Cold head (DE-204AF)
  • Compressor (ARS-4HW)
  • 2 helium hoses
  • Omniplex, sample in vapor vacuum chamber
  • Tail piece
  • OFHC copper radiation shield
  • Instrumentation for temperature measurement and control:
    • 10 pin hermetic feedthrough
    • 50 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 hermetic feedthrough
    • 4 copper wires
  • Sample holder for electrical experiments
  • Temperature controller
Options and Upgrades
  • Thinned aluminum tailpiece for neutron diffraction
  • Soft rubber bellows for low sample vibrations (see secondary image)
  • VSM adapter
  • Load-lock gate valve
  • 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
  • High temperature interface
  • Very high temperature interface
  • Second set of temperature control instrumentation for fine temperature control at the sample
  • Custom temperature sensor configuration (please contact our sales staff)
  • Custom wiring configurations (please contact our sales staff)
  • 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-204SF 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-204AFcold 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-204PF 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 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.

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*F-FMX-19N can accept all but our largest sample holders. Like all of our cold fingers, the Omniplex Sample Stick 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.

Omniplex: FMX-19N Specifications

Cooling Technology-
  DE-204 Closed Cycle Cryocooler
  Refrigeration Type Pneumatically Driven Gifford-McMahon Cycle
  Liquid Cryogen Usage None, Cryogen Free
Temperature*-
  DE-204AF < 10 K - 350 K
Interface temperature may be 1-2K higher
  DE-202SF < 4.2 K - 350 K
Interface temperature may be 1-2K higher
  DE-202PF < 5.5 K - 350 K
Interface temperature may be 1-2K higher
  With 800 K Interface (Base Temp + 2 K) - 800 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 50, 36, 24 mm (1.94, 1.44, 0.94 in)
Depending on selected sample tube
  Height 38 - 164 mm (1.5 - 6.46 in) Variable
  Sample Holder Attachment 1/4-28 screw
  Sample Holder View our Sample Holder Collection
Optical Access-
  Window Ports N/A
  Diameter N/A
  Clear view N/A
  #/F N/A
  Window Material View our Wide Selection of Window Materials
Temperature Instrumentation and Control (Standard)-
  Heater 1 - 50 ohm Thermofoil Heater Anchored on Cold Tip
  Control Sensor 1 - Curve Matched Silicon Diode
  Sample Sensor 1 - Calibrated Silicon Diode
Optional Second set of Control instrumentation on Sample Stick
  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 Stainless Steel Chamber
Customizable Tailpiece
  Length 185 mm (7.25in), At the Tailpiece
  Diameter 64, 50.8, 38 mm (2.5, 2, 1.5 in) (at the sample space)
  Width 64, 50.8, 38 mm (2.5, 2, 1.5 in) (at the sample space)
Radiation Shield-
  Material OFHC Copper, Nickel Plated
  Attachment Bolt-on
  Optical Access N/A(customer specified)
Cryostat Footprint-
  Overall Length 705 mm (27.8in)
  Motor Housing Diameter 114 mm (4.5 in)
  Rotational clearance Contact our Sales Staff

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
CS204*F-FMX-19N Sample in Vapor Top Loading Closed Cycle Cryostat Drawing

CS204*I-FMX-19N
Omniplex, Non-Optical

CS204*F-FMX-19N Sample in Vapor Top Loading Closed Cycle Cryostat for Neutron Science Drawing

CS204*I-FMX-19N
Thinned Wall for Neutron Scattering

Omniplex, FMX-19 Sample Stick Drawing

SH-19-1.0
Omniplex Sample Stick

ARS-4HW Compressor

ARS-4HW
Compressor

Click on the images for full size.
CS210SF-DMX-19-NS Sample In Vapor Cryostat with Thinned Aluminum Tailpiece for Neutron Scattering.

CS210SE-DMX-19-N