Specifications

Sample cooling assembly

Type:3-stage (sample + magnet + radiation shield)
Radiation shielding:Magnet radiation shield; main radiation shield with top viewport surrounds sample
Cooling source:2-stage closed cycle refrigerator (CCR) with 1 W cooling power at 4.2 K
  
Magnetic field
Magnet type:Superconducting solenoid
Field of orientation:Vertical (perpendicular to the sample plane)
Field control:Current control
Field capability:±25 kOe (±2.5 T) maximum
Field homogeneity:0.5% over 10 mm diameter; 1.0% over 25 mm diameter
Landed probe tip movement:<5 µm full field ramp

Temperature1

Magnetic fieldTemperature rangeConfiguration
±2.5 T10 KUp to 6 probe arms installed
±2 T11 K to 400 K
±1 T401 K to 500 K

Control stability

Sample stage temperatureStability
Base temperature (no heater control)Not specified
<10 K±50 mK
10 K to 100 K±10 mK
101 K to 250 K±10 mK
251 K to 350 K±10 mK
351 K to 500 K±10 mK

 Standard TPS-FRGPS-HV-CPX option
Pump down time90 min (to reach <1 × 10-3 Torr)30 min (to reach <1 × 10-3 Torr)
Room temperature<5 × 10-4 Torr<5 × 10-6 Torr
Base temperature<1 × 10-5 Torr<5 × 10-7 Torr
Maximum temperature<1 × 10-5 Torr<5 × 10-7 Torr

Cycle time:8.5 h
Pump down:1.5 h
Station cooldown:5 h
Station warmup:2 h

Vibration at sample:<1 µm

Sample 
Maximum sample size:51 mm (2 in) diameter
Sample backside optical access:Not an option
Sample rotation:Not an option

Probing configurations 
Maximum probes:6
Probe arm sensor:Included for monitoring probe temperature
Cooled probe mounts:<50 K with sample at base temperature
Probe mount:Thermally anchored to radiation shield
Probe arm:Thermally anchored to radiation shield
DC/RF probes and DC/RF flexible probes:Electrical isolation >100 GΩ for low leakage measurements
Microwave probes:Frequency range DC up to 67 GHz for RF measurements
Fiber optic probes:Available for electro-optical measurements
Probe landing:All probes can land at single point in a 25.4 mm (1 in) diameter circle

Cryogen consumption
Room to base temperature (total):Not required
Helium at 5 K:Not required
1Base temperature assumes heat load for probes thermally anchored as listed in probing section

Station details

Temperature equipment
Sample stage sensor/heater power:TG-120-CU-HT calibrated GaAs/50 W
Magnet stage sensor/heater power:CX-1030-CU calibrated Cernox/100 W
Radiation shield sensor/heater power:DT-670C-CU silicon diode/50 W
CCR 2nd stage sensor/heater power:DT-670A-CU silicon diode/no active control
CCR 1st stage sensor/heater power:DT-670C-CU silicon diode/100 W
Probe arm:DT-670C-SD silicon diode (on one probe arm)/no active control
Electronics console::
Temperature controllers:Two Model 336s
Magnet power supply:Model 625
Helium transfer line:Not required
  
Included sample holder:Removable SH-1.25-G, 31.8 mm (1.25 in) maximum sample size, grounded
  
Station footprint:800 mm (31.5 in) width × 670 mm (26.4 in) depth
(does not include console or CCR compressor)
  
Vacuum chamber
Material:Electroless nickel-plated aluminum
Overall size:280 mm (11 in) outer diameter × 270 mm (10.6 in) tall
Chamber access:229 mm (9 in) diameter opening
Viewport:63.5 mm (2.50 in) diameter fused quartz
Viewing area:54.0 mm (2.13 in) diameter
Pump port:NW 40 with included vacuum isolation valve
Gauge port:NW 25
Gas port:0.25 in NPT with valve
Over pressure safety:3.5 kPa (0.5 psi) pressure relief valve
  
Radiation shielding
Material:Electroless nickel-plated aluminum
Sample access:203 mm (8 in) diameter lid
Viewport:50 mm (1.97 in) diameter IR absorbing window
Viewing area:50 mm (1.97 in) diameter
  
Vision system
  
Included kits
Tool kit:Included tools for standard operation
Spares kit:Included kit for common consumable items
Probe starter kit:ZN50R-25-W (qty 2), ZN50R-25-BECU (qty 2), and
ZN50R-CVT-25-W (qty 2) for training
  
Utilities
1-phase voltage:100/120/220/240 VAC (+5%, -10%), 50/60 Hz
1-phase power: 2 kVA recommended
3-phase voltage (CCR):200 VAC (50/60 Hz) or 380/400/415 VAC 50 Hz or 480 VAC 60 Hz
3-phase power (CCR):6.6 to 6.9 kW at 50 Hz; 7.5 to 7.8 kW at 60 Hz
Cooling water power dissipation (CCR):8.5 kW max; 6.9 kW steady state at 50 Hz; 9.0 kW max; 7.8 kW steady state at 60 Hz
  
Approval:All instruments CE marked
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