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
• Type of measurable elements: 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
• Inlet types: filament sample turret with single and double filament options, optional preheat system
• Mass range : 3-280 amu
• 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)
• Signal stability, relative standard deviation : ±30 ppm over 30 minutes
• 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