MML incorporates two labs where we share equipment and expertise, one run by KTH Nanostructure Physics (Haviland, Korenivski), the other run by SU Experimental Condensed Matter Physics (Krasnov, Rhyd).  These labs contain measurement equipment for electronic measurement of small samples from room temperature to 10 mK, in magnetic fields up to 8 Tesla, and at frequencies up to 50 GHz.  Some of the major equipment are:

Cryogenic Equipment

  • 17 Tesla cryogen-free system
  • 3He cryostat with optical access   reaching 5 Tesla
  • cryogen-free cryostat reaching 12 K
  • Kelvinox AST minisorb Dilution refrigerator #1 (old AST)
  • Kelvinox AST minisorb Dilution refrigerator #2 (new AST)
  • Heliox sorption pump He3 system
  • Point contact dip-stick continuous flow cryostat
  • General purpose dip-stick continuous flow cryostat
  • General purpose dewar dipstick
  • 120 liter liquid He vessel with 2T magnet (fits all cryostats)
  • 120 liter liquid He vessel with 5T magnet (small bore, fits continuous flow dipsticks)
  • 350 liter liquid He vessel with 2T magnet (fits all cryostats)
  • 50 Liter low loss liquid He vessel with 8T magnet (small bore, fits continuous flow dipsticks)

High Frequency Measurement  Equipment

  • Agilent 50GHz Network Analyzer
  • Agilent 20 GHz sweep signal source
  • Agilent 3 GHz network analyzer
  • HP digital sampling oscilloscope (20 GHz Analog BW, Time Domain Reflectometry)
  • Tektronics digital oscilloscope (5 GS/sec, 1GHz Analog BW)
  • Agilent digital oscilloscope (5 GS/sec, 1GHz Analog BW)
  • Agilent digital oscilloscope (20 GS/sec, 5GHz Analog BW)
  • 3 Cryogenic low noise amplifiers, Miteq APS series (2-4 GHz, 4-8 GHz, 8-12 GHz, all ca. 30dB gain)
  • Homebuilt very low noise spectrum analyzer based on cryogenic amps, mixers, DAC card
  • Mixers, Circulators, power splitters / combiners, pulse gereators,  etc.

General purpose Measurement  Equipment

  • Several computers with Labview Software and Digital Acquisition cards
  • 3 Stanford DSP Lockin Amplifiers, 0.01Hz to 100 kHz
  • Large number of multimeters, Waveform Geneatores,  and other GPIB interface measurement equipment
  • LS340 temperature controllers (2)
  • LS332 temperature controller
  • KE6221/2182A ac + dc precision current source and nano-voltmeter (2)
  • SR830 lock-in amplifiers (2)
  • Cryogenics MPS (Magnet power supply)
  • SR560 Preamplifier
  • DS345 Frequency generator
  • TTi frequency generator
  • TTi DC power supply
  • KE2700 multimeter & scanner
  • Digital oscilloscope
  • Turbo pump
  • PCI-6251, PCI-6259 M-series DAQ card from National Instruments (1 each)
  • Home-built preamplifiers
  • Tunable THz source with chopper
  • THz detector
  • THz lenses and polarization filters

PXI system

For control and measurements, we have a state-of-the-art, real-time PXI system   from National Instruments for high-speed and high-resolution data acquisition. This versatile system will enable unique electric, thermal, calorimetric, and magnetic measurements. In particular, the system includes:

  • PXI-8196: embedded real-time controller
  • PXI-5422: 200 MS/s, 16 bit waveform generator, up to 2 GHz random interleaved
  • PXI-4461: 24 bit, 204.8 kS/s analog inputs (2), analog outputs (2)
  • PXI-4462: 24 bit, 204.8 kS/s analog inputs (4)
  • PXI-5922: 24 bit flex, 500 kS/s to 15 MS/s analog input
  • PXI-5122: 100 MS/s, 14 bit analog inputs (2), 256 Mb/ch
  • PXI-7831R: FPGA (1MGates, 40 MHz base clock), integrated with digital i/o (24 ch), 200 kS/s, analog inputs (8 ch, 200 kS/s, 16 bit), analog outputs (8 ch, 500 kS/s, 16 bit)
  • PXI-6251: M-series, 16 bit, 1.5 MS/s, digital i/o (24 ch), analog inputs (8), analog outputs (2)
The system is be combined with low-noise and/or transformer preamplifiers to yield nV-level resolution.

Measurement software

The instrumentation is integrated by means of a LabVIEW-based measurement program for automated measurements. The system currently supports:

  • VISA, GPIB, and serial communication with connected instruments
  • Waveform generation, sampling & analysis
  • Communication with the PXI system cards
  • Communication with front panel of the FPGA
  • Remote access of the 17 T magnet computer controller