ZMS DF-TIMS -01

High-precision double-focusing thermal ionization mass spectrometer (TIMS) with fixed multicollectors and variable dispersion optics.

• Status: Active
• Country: China
• Isotopic: Yes
• Analyte Type / Target Of Analysis: Thermoionizing elements (Sr, Nd, Os, Pb, U, and others)
• Measurable Isotopes/Elements: Lithium to uranium isotopes, including 6Li/7Li, 234U/238U, and other actinides
• Analyzer Type
  : Magnetic Sector MS
• Ion Source Type: Thermal ionization
• Signal Stability / Relative Standard Deviation
  : ±30 ppm over 30 minutes
• Inlet Types: filament sample turret with single and double filament options, optional preheat system
• High Resolution
  : Yes
• Multicollector
  : Yes
• Collectors Qty
  : Up to 15 fixed-position Faraday collectors and up to 4 full-size discrete dynode electron multipliers (SEM)
• Sensitivity
  : High sensitivity; 238U isotopic sensitivity: ≤2 ppm (without RPQ), ≤0.1 ppm (with RPQ lens)
• Abundance Sensitivity
  : ≤0.1 ppm with RPQ lens for uranium isotopes
• Dynamic Range
  : dynamic range from 0 to 50V
• Detection Limits
  : Sub-ppm detection limits
• Precision
  : Internal precision: <0.002% for 238U (U500 standard)
• Detector Type
  : Faraday cups and Secondary Electron Multipliers (SEM) with RPQ lens for improved sensitivity
• Possible Amplifiers
  : 15 amplifiers, noise ≤ 40 μVrms (10¹¹ Ω, 4-second integration time)
• Sample Turret
  : 21-position automated cathode drum
• Geometry Type
  : Nier-Johnson straight geometry with double focusing
• Focusing Type
  : Variable dispersion zoom optics using dual quadrupole lenses
• Magnetic Sector Radius/ Angle
  : Magnetic analyzer radius: 350 mm; 90° deflection
• Electric Sector Radius/ Angle
  : Electrostatic analyzer radius: 250 mm
• Vacuum System
  : Static vacuum system, UHV ≤ 5 × 10^-8 mbar in the ion source, ≤ 5 × 10^-9 mbar in the analyzer Oil-free vacuum system with forevacuum, turbomolecular pump, and nitrogen trap
• Gas Supply: Optional nitrogen bleed system