TTPX Specifications

Sample cooling assembly

Type: 2-stage flow cryostat (sample + radiation shield)
Radiation shielding: Radiation shield with top viewport surrounds sample
Cooling source: Liquid helium (LHe) or liquid nitrogen (LN2)

Magnetic field:

Ring magnet kit


Base temperature Control range Configuration
4.3 K 4.4 K to 475 K 2 probe arms installed
4.325 K 4.4 K to 475 K 4 probe arms installed
4.35 K 4.4 K to 475 K 6 probe arms installed
3.2 K 3.3 K to 475 K with PS-LT option
20 K 20 K to 675 K with PS-HTSTAGE option

Control stability

Sample stage temperature Helium stability Nitrogen stability
Base temperature (no heater control) ±15 mK ±20 mK
<10 K ±50 mK
10 K to 100 K ±20 mK ±50 mK
101 K to 250 K ±15 mK ±50 mK
251 K to 350 K ±15 mK ±100 mK
351 K to 475 K ±50 mK ±100 mK
476 K to 675 K ±50 mK ±100 mK


  Standard TPS-FRG
Pump down time 15 min
(to reach <1 × 10-3 Torr)
Room temperature <5 × 10-4 Torr
Helium base temperature <1 × 10-5 Torr
Maximum temperature <5 × 10-3 Torr

Cycle time (LHe):

2 h
Vacuum pump down: 15 min
Station cooldown: 45 min
Station warmup: 60 min

Vibration at sample

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


Maximum sample size: 51 mm (2 in) diameter
Sample backside optical access: 5 mm (0.2 in) diameter
Sample rotation: Not an option

Probing configurations

Maximum probes: 6
Probe arm sensor: Included for monitoring probe temperature
Cooled probe mounts: <35 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
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 consumption

Room to base temperature (total): 3.5 liquid L helium; 2.5 liquid L nitrogen
Helium at 5 K: 3 liquid L/h
Nitrogen at 80 K: <0.5 liquid L/h

Station details

Temperature equipment

Sample stage sensor/heater power: DT-670-CU-HT calibrated silicon diode/50 W
Radiation shield 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: 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:

654 mm (25.8 in) width × 676 mm (26.6 in) depth

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: Not an option
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: 122 mm (4.8 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


1-phase voltage: 100/120/220/240 VAC (+5%, -10%), 50/60 Hz
1-phase power: 1.7 kVA recommended
3-phase voltage: Not required
3-phase power: Not required
Cooling water: Not required


Back to the TTPX overview

Probing configurations

Vision system