DMX-20-OM Specifications

Cooling Technology
  DE-204 Closed Cycle Cryocooler
  Refrigeration Type Pneumatically Driven Gifford-McMahon Cycle
Low Vibration Helium Exchange Gas
(Tip down operation only)
  Liquid Cryogen Usage None, Cryogen Free
Temperature*
  DE-204AF < 10 K - 350 K
DMX-20-OM interface adds 4-5K to base temperature
  DE-204SF < 4.2 K - 350 K
DMX-20-OM interface adds 4-5K to base temperature
  DE-204PF < 5.5 K - 350 K
DMX-20-OM interface adds 4-5K to base temperature
  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 19 mm (0.75 in)
7.8 mm (0.31 in) clear view with transmission upgrade
  Height 1.5 - 7 mm (0.059-0.27 in)
Continuously adjustable sample to window distance.
  Sample Holder Attachment 1/4-28 screw
  Sample Holder View our Sample Holder Collection
Optical Access
  Window Ports 1 (2 with transmission option)
  Diameter 25.4 mm (1 in)
  Clear view 23 mm (0.9 in)
  #/F Variable
  Window Material View our Wide Selection of Window Materials
Temperature Instrumentation and Control (Standard)
  Heater 1 - 50ohm 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 Bolt-on, 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 39 mm (1.52 in) sample platter thickness
  Diameter 127 mm (5 in) at the sample platter (at the sample space)
  Width 127 mm (5 in) at the sample platter (at the sample space)
Radiation Shield
  Material OFHC Copper, Nickel plated
  Attachment Bolted
  Optical Access 1 (2 with transmission option) *Customer specified
Cryostat Footprint
  Overall Length 645 mm (25.4 in)
  Motor Housing Diameter 114 mm (4.5 in)
DMX-20 Sample Vibrations
  Independent Mounting 3 - 5 nm
  Direct Soft Mount < 140 nm

DE-204 Cold Head 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)

ARS-4HW Compressor Specfications


Compressor Model ARS-4HW
  Frequency 60 Hz 50 Hz
Standard Voltage Min 208 V 190 V
  Max 230 V 210 V
Transformer Options 10%   220 V, 230 V
  15%   240 V
Power Usage Singe Phase 3.6 kW 3.0 kW
Refrigerant Gas 99.999% helium gas,
pre-charged
Noise Level 60 dBA
Ambient Temperature 12 - 40 C (54-104 F)
Cooling Water Consumption 1.5 L / min (0.4 Gal. / min)
  Temperature 10 - 35 C (50-95 F)
  Connection 3/8 in. Swagelok fitting
Dimensions L 483 mm (19 in)
  W 434 mm (17.1 in)
  H 516 mm (20.3 in)
Weight Compressor 72 kg (160 lbs)
Typical Maintenance Cycle 30,000 hours
Water Recirculation Option CoolPac compatible