Home > Lake Shore Products > Cryogenic Probe Stations > Model HFTTP4 Cryogenic Probe Station Technical Specifications

Model HFTTP4 Cryogenic Probe Station

Specifications

Magnetic Field

Maximum field

10 k0e (1 T)

Temperature

Operating temperature range—all probe types	2 K to 400 K

Temperature control (heaters)
Cold head stage	50 W
Magnet stage	100 W
Two radiation shields	100 W and 50 W
Probe arm	Measurement only

Probe Arm Adjustments

Travel
X axis	51 mm (2 in)
Y axis	25 mm (1 in)
Z axis	18 mm (0.7 in)

Translation resolution
X axis	20 µm
Y and Z axes	10 µm
Theta planarization^*	±5°

^*Included with microwave probes

Frequency Range

ZN50 DC/RF probe frequency range
Tungsten with cryogenic coax cable	0 to 50 MHz^*
Tungsten with semirigid coax cable	0 to 1 GHz^*†
Paliney 7 with cryogenic coax cable	0 to 50 MHz^*
Paliney 7 with semirigid coax cable	0 to 1 GHz^*†
BeCu with cryogenic coax cable	0 to 50 MHz^*
BeCu with semirigid coax cable	0 to 1 GHz^*†

GSG microwave probe frequency range
Low frequency with K connector	0 to 40 GHz^*
Mid frequency with 2.4 mm connector	0 to 50 GHz^*
High frequency with 1.8 mm connector	0 to 67 GHz^*
Click here for probe & cable features

^*Selectable equipment
^†S21 > -10 dB up to 1 Ghz, except for a (-40 dB) spike between 400 MHz and 800 MHz depending on probe model and placement; S11 < -3 dB up to 1 GHz

Optical

Optical viewport—located on top lids	Ø54 mm (2.1 in) outer window and Ø51 mm (2 in) inner window
Outer, clear fused quartz	99% IR transmittance
Inner	IR absorbing with narrow band visible light transmittance

Optical resolution—monoscope
7:1 zoom	9 µm
12.5:1 zoom	5 µm^*
16:1 zoom	4 µm^*

^*Selectable equipment

Sample Holder (Chuck)

Maximum sample size—overall	Up to Ø25 mm (1 in)
SH-1.00-G, Grounded chuck	Up to Ø25 mm (1 in) and 400 K
SH-1.00-I, Isolated chuck	Up to Ø25 mm (1 in) and 400 K^*
SH-1.00-C, Coaxial chuck	Up to Ø25 mm (1 in) and 400 K^*
SH-1.00-T, Triaxial chuck	Up to Ø25 mm (1 in) and 400 K^*
Click here to select a sample chuck (holder)

^*Selectable equipment

Standard Equipment

Superconducting magnet	10 k0e (1 T), horizontal field, split pair

Superconducting magnet power supply	Lake Shore Model 625
Output type	Bipolar, 4-quadrant, DC current source
Current	±60 A
Voltage	±5 V

Open cycle multi-stage refrigerator	4.2 K to 400 K
Cold head stage temperature sensor	Lake Shore Model CX-1030-SD-HT-4M calibrated Cernox^TM RTD
Cold head stage heater	50 W
Magnet stage temperature sensor	Lake Shore Model CX-1030-SD-HT-4M calibrated Cernox^TM RTD
Magnet stage heater	100 W

Cooled radiation shield and cooled IR-absorbing window above the sample
Two radiation shield temperature sensors	Lake Shore Model DT-670C-CU silicon diode
Two radiation shield heaters	100 W and 50 W
Removable top lid with viewport	Ø51 mm (2 in) window

Temprature controllers	One Lake Shore Model 340 with 3462 expansion card, one Model 332S, and one Model 142 200 W (2-channels, 100 W each) power supply (independent regulation of cold head stage, magnet stage, radiation shield, and probe arm temperature monitoring)

Vacuum chamber Diameter	25.4 cm (10 in)
Removable top lid with clear fused quartz viewport	Ø54 mm (2.1 in) window
Probe ports	4 equally spaced surround the sample thermal radiation shield

Machined aluminum base plate	53.3 cm²(21 in²)

Vibration isolation table	Low vibration, non-magnetic stand, PVC construction with sand weighted legs and brass fittings

Four XYZ precision micro-manipulated probing stages

Probe arms, thermal radiation shields, stainless steel welded bellows, and feedthrough ports

One probe mount includes a platinum temperature sensor installed and wired to a 6-pin feedthrough

Grounded sample holder	SH-1.00-G, accomodates up to a Ø25 mm (1 in) sample with a Ø25 mm (1 in) probe area

Optics Zoom 70 monoscope	7:1 zoom with 9 µm resolution
Color CCD camera
Swing arm	Optics can be manipulated to view any part of the sample or wafer, and can be retracted and swung away to allow access to the top of the vacuum chamber for sample exchange
Video monitor	High resolution, 17-inch
Sample illumination	Coaxial via fiber optic or ring light from an adjustable light source and power supply (must specify sample illumination at time of order) NOTE: Coaxial illumination is recommended for highly reflective materials

High efficiency helium transfer line with foot valve for precise flow regulation

Basic tools, spares, and cleaning kit

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