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Liquid Flow Probe Station: PS-L

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  • Specifications
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Overview image of the CS204*F-PS-2-4 Closed Cycle Cryogenic Probe Station
A top down view of the sample space in the ARS manufactured CS204*F-PS-2-4 Micromanipulated Closed Cycle Cryogenic Probe station Zooming incrementally into the maximum resolution of the system

The ARS PS-L Flow Cryostat Probe Station uses Liquid Helium or Liquid Nitrogen as the cooling agent to reach cryogenic temperatures of ~4 K or ~77 K depending upon the cryogen used.

The core of the system is the same for both the Liquid and Closed Cycle Probe Stations, which enables the Flow Cryostat to be removed from this system and replaced with a Closed Cycle (cryogen-free) configuration at a later point, if your needs change.

Download PS-L Data Sheet

ARS manufactures both the Helitran Helium transfer system and the probe station. This integrated approach ensures consistent performance and also facilitates diagnostics and service of the integrated system.

Contact us today for a personalized quotation for an ARS Liquid Flow Probe Station.

  • Magnetic properties
  • DC, RF properties
  • Microwave properties
  • MEMS
  • Nanoscale electronics
  • Superconductivity
  • Electrical and optical properties of nano circuits
  • Quantum dots and wires
  • Non-destructive device testing
  • 4 K - 400 K temperature range with liquid helium
  • 77 K - 400 K temperature range with liquid nitrogen
  • 2 in. test area
  • 2.75 in. clear view top window
  • Up to 6 micro-manipulated probe arms
  • 2 additional accessory ports
  • Thermally anchored triaxial single tip probe holders with
    replaceable tungsten tips
  • 1 µm sensitivity precision actuators
  • High stability spring-loaded linear motion stages
  • All stainless steel vacuum enclosure for low vacuum and
    fast pumping times
  • 7:1 zoom microscope with ring light
  • Super soft copper braids transmit maximum cooling power and minimal vibrations to cold stage
  • Elastomeric isolators on table for high frequency vibration dampening
  • Soft air mount feet for high shock and low frequency vibration dampening
  • Heated radiation shield for faster sample change
  • Cryogen free
  • Fully customizable
Typical Configuration
  • Liquid Flow Cryostat
  • Transfer Line - Standard 6’ (8’ or 10’ options)
  • Flow Meter Panels
  • 10” Diameter Stainless Steel Vacuum Chamber with 6 Micromanipulated Probe Ports and 2 Spare NW 80 Accessory Ports Mounted on an Anodized Aluminum Table Top with Extruded Aluminum Support System.
  • 8” Diameter Nickel Plated OFHC Copper Radiation Shield
  • 2.25” Diameter Grounded Sample Holder made out of OFHC Copper.
  • DC, Microwave, or Fiber Optic Probes
  • 4 Sensors and 2 Heaters for temperature control and monitoring
  • Lakeshore LS336 (4) Channel Temperature Controller with interconnecting cable to the cryostat.
  • 7:1 Zoom Microscope with <2 micron resolution and coaxial or ring light. Includes a High Resolution 24” Wide Screen LCD Display and a light source for the microscope
Options and Upgrades

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.

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 large clear view vacuum shroud window and radiation shield optical ports allows for a large cone of optical access 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.

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.

Liquid Flow Probe Station Specifications

Cooling Technology
  LT-3 Liquid Flow Cryostat
  Liquid Cryogen Usage Liquid Helium or Liquid Nitrogen
  Liquid Helium ~4 K - 400 K*
  Liquid Nitrogen ~77 K - 400 K*
  Stability 0.1 K
  * 500K and 800K options also available
Cooldown Time
  ~ 5 K ~ 30-45 minutes
Probe Arms
  GSG Microwave Tungsten with Coaxial or Triaxial Cable
(custom tips available)
  DC/Low Frequency Contact ARS for Custom Microwave Probe Solutions
  Fiber Optic Contact ARS for Custom Fiber-Optic Probe Solutions
Vibration Isolation Table
  Vibration Level < 1 µm (With Cryocooler Running)
  Table Top Height 765 mm (30.1 in.)
  Table Top Width 927 mm ( 36 in.)
  Vertical Travel (Z-axis) 737 mm (29 in.)
7:1 GigE Microscope with Zoom Lens*
  Field Of View 4.2 - 0.61 mm
  Working distance 89 mm
  Numerical Aperture (N.A.) 0.024 - 0.08
  Highest Resolution 1 µm
  Magnification Final magnification depends on the monitor size
  Image Size 1280 x 1024 pixels
  Camera Output USB-2.0
  Frame rate 25 fps
  Accessories Ring Light Boom Stand USAF 1951 Test target

Liquid Flow Probe Station

Click on the images for full size.

Continuous flow probe station with leastomeric vibration isolators. This design features manual and motorized capabilities.