CRX-6.5K Specifications

Sample cooling assembly

Type: 2-stage (sample + radiation shield)
Radiation shielding: Radiation shield with top viewport surrounds sample
Cooling source: 2-stage closed cycle refrigerator (CCR) with 3 W cooling power at 10 K
Magnetic field: Ring magnet kit


Base temperature Control range Configuration
8 K 8.5 K to 350 K 2 probe arms installed
9 K 9.5 K to 350 K 4 probe arms installed
10 K 10.5 K to 350 K 6 probe arms installed
20 K 20 K to 675 K with PS-HTSTAGE option

1Base temperature assumes heat load for probes thermally anchored as listed in probing section

Control stability

Sample stage temperature Stability
Base temperature (no heater control) Not specified
<10 K ±25 mK
11 K to 350 K ±10 mK
351 K to 675 K ±50 mK


Room temperature: <5 × 10-4 Torr
Base temperature: <1 × 10-5 Torr
Maximum temperature: <5 × 10-5 Torr

Cycle time:

6.25 h
Pump down: 0.5 h
Station cooldown: 3.5 h
Station warmup: 2.25 h

Vibration at sample:

<2 µm


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: <20 K with sample at base temperature
Probe mount: Thermally anchored to sample stage
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

Station details

Temperature equipment

Sample stage sensor/heater power: DT-670-CU-HT calibrated silicon diode/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/50 W installed but not actively monitored
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
Temperature controller: Model 336
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:

654 mm (25.8 in) width × 676 mm (26.6 in) depth
(does not include CCR compressor)

Vacuum chamber

Material: Electroless nickel-plated aluminum
Overall size: 203 mm (8 in) outer diameter × 132 mm (5.2 in) tall
Chamber access: 152 mm (6 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 25 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: 132 mm (5.2 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


1-phase voltage: 100/120/220/240 VAC (+5%, -10%), 50/60 Hz
1-phase power: 1.5 kVA recommended
1-phase voltage (CCR): 208/230 V (+5%), 60 Hz or 200/230/240 (+5%), 50 Hz (2 pole, 3 wire single phase plus ground, 20 A)
1-phase power (CCR): 3.0 kW, 15.5 A full load at 208 V, 60 Hz; 2.6 kW, 13 A full load at 200 V, 50 Hz
Cooling water power dissipation (CCR): 3.2 kW 50/60 Hz — see list of available recirculating chillers


Back to the CRX-6.5K overview

Probing configurations

Vision system

Recirculating chillers