CRX-EM-HF 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 1 W cooling power at 4.2 K

Magnetic field

Magnet type: Electromagnet
Field of orientation: Horizontal (parallel to the sample plane)
Field control: Hall probe installed in station for closed loop control
Field capability: ±6 kOe (±0.6 T)
Field homogeneity: 0.6% over 10 mm diameter; 2.6% over 25 mm diameter
Landed probe tip movement: <5 µm full field ramp


Base temperature Control range Configuration
8 K 10 K to 400 K Up to 4 probe arms installed

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 ±50 mK
10 K to 100 K ±20 mK
101 K to 250 K ±20 mK
251 K to 350 K ±20 mK
351 K to 400 K ±50 mK

  Standard TPS-FRG
Pump down time 30 min (to reach <1 × 10-3 Torr)
Room temperature <5 × 10-4 Torr
Base temperature <1 × 10-5 Torr
Maximum temperature <5 × 10-4 Torr

Cycle time:

4.5 h
Pump down: 0.5 h
Station cooldown: 2.25 h
Station warmup: 1.75 h

Vibration at sample:

<1 µm


Maximum sample size: 25.4 mm (1 in) diameter
Sample backside optical access: Not an option
Sample rotation: Optional 360° rotation stage (PS-360-EMPX)

Probing configurations

Maximum probes: 4 (see orientation diagram)
Adjacent probe proximity: Due to the orientation of the probe arms, adjacent probes have minimum landing distance. Contact Lake Shore for additional information.
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

CRX-EM-HF probes are aligned at 30 degree angles

Station details

Temperature equipment

Sample stage sensor/heater power: CX-1050-CU-HT-1.4M/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
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
Gaussmeter: Model 475
Magnet power supply: Model 643
Helium transfer line: Not required
Removable SH-1.00-G-EM, 25.4 mm (1 in) maximum sample size, grounded

Station footprint:

911 mm (36 in) width × 660 mm (26 in) depth (does not include console or CCR compressor)

Vacuum chamber

Material: Electroless nickel-plated aluminum
Overall size: 191 mm (7.5 in) × 340 mm (13.4 in) × 213 mm (8.4 in) tall
Chamber access: 133.4 mm (5.25 in) × 243.2 mm (9.58 in) 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: 59 mm (2.3 in) × 157 mm (6.2 in)
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: 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
3-phase voltage (EM): 200/208, 220/230, 380, 400/415 VAC (±10%), 50/60 Hz
3-phase power (EM): 5.5 kVA max, 50/60 Hz
Cooling water power dissipation (EM): 5 kW max, 50/60 Hz
Total system cooling water power dissipation: 12.75 kW max at 50 Hz, 13.25 kW max at 60 Hz — see list of available recirculating chillers


Back to the CRXEM-HF overview

Probing configurations

Vision system

Recirculating chillers