Cryostat Low Temperatures and High Magnetic Field Optical Research Platform

Overview

The platform is a highly integrated cryogenic system combining extremely low temperatures, strong magnetic fields and flexible optical testing capabilities. It provides a large sample space and can integrate a multi-axis cryogenic piezoelectric stage and in-situ electrical test leads to support a broad range of low-temperature optical and time-resolved measurements.

Technical parameters

• Temperature
  • Temperature range: 1.7 K to 350 K
  • Temperature stability: ±0.2% (temperature < 20 K); ±0.02% (temperature > 20 K)
• Magnetic field
  • Magnet type: Conical split-coil superconducting magnet
  • Magnetic field direction: Vertical
  • Magnetic field strength: ±7T
  • Magnetic field uniformity region: ±0.3% (3 cm spherical region)
  • Field sweep rate: 0–7T ≤ 30 minutes
• Vibration
  • Sample stage vibration: ±20 nm
• Sample space
  • Sample space: 89 mm diameter, 88 mm height
• Optical window
  • Top optical window: 1 × 50 mm diameter, 44 mm clear aperture
  • Side optical windows: 7 × 40 mm diameter, 26 mm clear aperture
• Optical path angle
  • Top optical window (sample at magnet center): 70° full angular range
  • Top optical window (sample 13 mm above center): 90° full angular range
  • Standard distance between top window and sample: 15 mm
  • Side optical window: 13° full angular range (sample at the magnet center)
• Electrical channels
  • DC channel: 16 DC lines
  • High-frequency channel: 4 × 20 GHz high-frequency lines
  • Expansion channel: Supports up to 80 cables

Characteristics / Technical specifications

• Integrated cryostat combining low temperature and strong magnetic field for optical measurements
• Large sample volume compatible with multi-axis cryogenic piezo stage and in-situ electrical leads
• Multi-directional optical access: one top window, seven side windows and a bottom window for flexible optical geometries
• Designed for MOKE, TR-MOKE, low-temperature Raman spectroscopy, photoluminescence, ultrafast laser pumping and terahertz time-domain spectroscopy