lipix

CPX-VF probe station specifications

Sample cooling assembly 

Type:1 + 3-stage split flow cryostat (sample + magnet + 2 radiation shields); dual exhaust ports with independent flow control of sample and magnet
Radiation shielding:Magnet radiation shield; main radiation shield with top viewport surrounds sample; outer second (partial) radiation shield
Cooling source:Liquid helium (LHe)
  

Magnetic field

 
Magnet type:Superconducting solenoid
Field orientation:Vertical (perpendicular to the sample plane)
Field control:Current control
Field capability:±25 kOe (±2.5 T)
Field homogeneity:0.5% over 10 mm diameter; 1.0% over 25 mm diameter
Landed probe tip movement:<5 µm full field ramp

Temperature1

Base temperature Control range Configuration
4.3 K4.4 K to 420 KUp to 6 probe arms installed
1.9 K2 K to 420 Kwith PS-LT option
1Base temperature assumes heat load for probes thermally anchored as listed in probing section

Control stability

Sample stage temperature Helium stability
Base temperature (no heater control)±15 mK
<10 K±50 mK
10 K to 100 K±20 mK
101 K to 250 K±15 mK
251 K to 350 K±15 mK
351 K to 420 K±50 mK

Vacuum

 Standard TPS-FRG PS-HV-CPX option
Pump down time30 min
(to reach <1 × 10-3 Torr)		10 min
(to reach <1 × 10-3 Torr)
Room temperature<5 × 10-4 Torr<5 × 10-6 Torr
Helium base temperature<1 × 10-5 Torr<5 × 10-7 Torr
Maximum temperature<5 × 10-5 Torr<5 × 10-7 Torr

Cycle time (LHe):

4 h
Vacuum pump down:0.5 h
Station cooldown:2 h
Station warmup:1.5 h

Vibration at sample

 Standard PS-PVIS option
X axis<300 nm (11.8 µin)<30 nm (1.18 µin)
Y axis
Z axis

Sample

 
Maximum sample size:51 mm (2 in) diameter
Sample backside optical access:Not an option
Sample rotation:±5° in-plane rotation

Probing configurations

 
Maximum probes:6
Probe arm sensor:Included for monitoring probe temperature
Cooled probe mounts:<20 K with sample at base temperature
Probe mount:Thermally anchored to magnet 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 (1.00 in) diameter circle

Cryogen consumption2

Room to base temperature (total):15 to 20 liquid L helium
Helium at 5 K:1 to 2 liquid L/h
2Assumes maximum number of probe arms installed

Station details

Temperature equipment

Sample stage sensor/heater power:CX-1050-CU-HT-1.4M calibrated Cernox/50 W
Magnet stage sensor/heater power:CX-1030-CU calibrated Cernox/100 W
Radiation shield sensor/heater power:DT-670C-CU silicon diode/100 W
2nd radiation shield sensor/heater power:DT-670C-CU silicon diode/50 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:Large bore helium/nitrogen transfer line with flow control 12.7 mm (0.5 in) top port withdrawal
  

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 instrument console)
  

Vacuum chamber

Material:Electroless nickel-plated aluminum
Overall size:280 mm (11 in) outer diameter × 343 mm (13.5 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 (two ports)
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:194 mm (7.6 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:Not required
3-phase power:Not required
Cooling water:Not required
  

Approval:

All instruments CE marked


 

Back to the CPX-VF overview

Sample holders

Probing configurations

Vision system

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