Superconducting Magnet Cryogenic Probe Station

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Code

Description

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Cryogenic Probe Station

cryogen-free 2” probe station

• Temperature Range:4.2K-350K 
• Stainless steel Vacuum chamber
• Six (6) probe ports
• one vacuum gauge port
• Rated for vacuum of better than 10^-3 Torr at room temperature if pumped with proper pumping station
•  Seals: buna-n O-rings
• Removable top lid with 63mm or greater viewport to ensure clear viewing of the sample area and all probes
• Gas port with vent for fast venting

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Temperature Control and monitoring

• Multi-channel temperature controller from CTC100 with two automated PID loops. 

1. a. separate temperature control of sample chuck, and radiation shield 
2. b. Stability: < ±50 mK below 100K, : < ±100 mK over the rest of the temperature range

• Install GaAs temperature sensor and 100W heater on the sample stage; Install CerNOx sensors and 100W heaters on superconducting magnets; Install silicon diode sensors and 100W heaters on the radiation screen; Install silicon diode sensors and 100W heaters on the secondary refrigeration platform; One of the needle arms is equipped with a silicon diode sensor
• LabView drivers provided. 

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Digital microscope

• 7:1 manual zoom lens
• Camera tube
• 1X LOWER LENS
• Megapixel color CCD USB2.0 camera
• Sample illumination: coaxial
• Microscope resolution: 4 microns

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Sample Holder

Ground 2” sample stage, gold-plated OFHC copper which can accommodate samples up to 2” diameter

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 Triaxial DC XYZ Manipulated Probe Arms

(6 Triaxial DC Arms)

• 50mm range of motion in X direction, 25mm range of motion in Y direction, 25mm in Z direction with 40TPI resolution (3mm).
• Bellows accommodate full range of motion.  
• DC Probe arms and probe holders   
• Triaxial cabling and feedthroughs. 
• Probes are thermally anchored to the chuck and shield with soft OFC braids. 

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Lab Chiller

• chiller：15KW @25℃
• Nominal cooling capacity: 8KW @ 25 ℃
• Temperature control method: start stop
• Cooling method: Compressor cooling
• Temperature control accuracy: ± 1 ℃ Temperature control range: 5-35 ℃
• Water pump pressure: 0.15-0.5 (Mpa) adjustable water pump flow rate: 5-33 (L/min) adjustable water tank volume: 60L (stainless steel material) refrigerant: R22
• Filtering device: Built in filter, filters large particles above 10 μ m Alarm signals: water level alarm, over temperature alarm
• Indoor unit size: 490 × 610 × 900 (width × depth × height) mm Outdoor unit size: 860 × 350 × 630 (width × depth × height) mm
• Power requirements: 220V, 50Hz
• Comes with 4-meter fluorine copper tube, 4-meter power cord, and 30 meter water pipe as standard with the host
• Inner diameter of water pipe 8mm, 10mm, 12mm, 16mm (choose one of the specifications)

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Molecular Pump Group

• Molecular pump group
• Front stage pump (dry vacuum pump): MVP 015
• Molecular pump interface flange: optional: DN 63/40 (KF/CF/F)
• Molecular pump power supply: 110 V, 50/60 Hz; 230 V, 50/60 Hz
• Pre stage pump pumping speed (50 Hz): 3m3/h
• Extraction speed (N2): 67 l/s
• Weight: 17kg
• Extreme vacuum degree of molecular pump group:<1x10^-7 hPa 

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Superconducting Magnet

Superconducting Solenoid:

• Maximum central magnetic field ± 2.5T
• Magnetic field uniformity: 0.5% center 10mm diameter sphere, 1% center 20mm diameter sphere
• Magnetic field direction: perpendicular to the sample surface
• Magnetic field type: superconducting solenoid
• Magnetic field control: Calibrate the current magnetic field relationship
• Maximum operating current 100A

Magnet Power Supply:

• High stability true bipolar DC power supply, smooth zero crossing current, output current -100A -+100A, voltage ± 5V
• Stability better than 50ppm/h
• Output current voltage four quadrant operation (suitable for electromagnetic inductive loads)
• The communication interface uses RS-232C and GPIB, and the power supply can be controlled through the upper computer software, providing LABVIEW control subroutine

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Low Temperature Probe

• The gold-plated Guard protective layer is connected to the outer shielding wire of the coaxial cable, and cooperates with the three coaxial connectors to form a Guard voltage, realizing the Guard protection function of electrical signal transmission from the external connector of the probe station to the probe. It can cooperate with semiconductor analyzers to test weak signals with a leakage current of less than 100fA
• Needle tip diameter: 1 micron, 5 microns, 10 microns optional

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