MI 1201-AT

Retired thermal ionization mass spectrometer. Capable of analyzing isotopes ranging from lithium to transuranic elements.

• Status: Inactive
• Country: Ukraine
• Isotopic: Yes
• Analyte Type / Target Of Analysis: Thermoionizing elements (Sr, Nd, Os, Pb, U, and others)
• Measurable Isotopes/Elements: Uranium isotopes: 234U, 235U, 236U, 238U and others
• Analyzer Type
  : Magnetic Sector MS
• Ion Source Type: Thermal ionization
• Signal Stability / Relative Standard Deviation
  : <0.005% over 20 minutes
• Inlet Types: Sample turret; dual-strip mode for simultaneous sample analysis
• Mass Resolution/ Mass Resolving Power
  : >500 for uranium isotopes (5% valley definition)
• Multicollector
  : Yes
• Collectors Qty
  : Five Faraday collectors with a secondary electron multiplier (SEM)
• Abundance Sensitivity
  : Isotopic sensitivity threshold for uranium <5 ppm (mass 237, Δm = 1)
• Dynamic Range
  : 5 x 10⁵ for Faraday detection; extended to 10⁸ in SEM mixed mode
• Detection Limits
  : Sub-ppm levels for isotopic measurements
• Precision
  : Single-collector mode: <0.01% internal precision; Multi-collector mode: <0.002% internal precision
• Detector Type
  : Faraday cups and secondary electron multiplier (SEM)
• Possible Amplifiers
  : High-stability amplifiers with 10¹¹ Ω resistors
• Sample Turret
  : 22-position turret with motorized or manual adjustment
• Geometry Type
  : Double-focusing sector with a 90° magnetic analyzer
• Focusing Type
  : Stigmatic focusing
• Magnetic Sector Radius/ Angle
  : 200 mm radius; 90° deflection
• Cooling System
  : Air-cooled
• Vacuum System
  : Oil-free system: two charcoal sorption pumps, three ion-getter pumps, and a turbomolecular pump
• Power Specifications: Three-phase 220 V ±10%, 50 Hz; maximum power consumption: 5 kVA
• Environmental Specifications: Temperature: 10–35°C; Humidity: up to 80% at 25°C; Atmospheric pressure: 84.0–106.7 kPa
• Physical Specifications: Analytical unit: 1500 x 1400 x 1500 mm; Operator desk: 1400 x 800 x 800 mm; Total weight: 2500 kg