EQUIPMENT

Accelerator Mass Spectrometry

1 MV AMS

AMS Specification

Accelerator

  • Maker/Model: HVEE/4110Bo-AMS-3
  • Type: Tandetron
  • Terminal voltage: 1 MV
  • Maximum charging current : 150 uA
  • SF6 insulation
  • Ar stripper

Ion source

  • Model: SO-110-50 Cesium sputter type negative ion source
  • Multiple cathods: Carrousel with 50 sample holders
  • Maximum beam current: 150 uA (solid target), 10 uA (gas target)
  • Extraction voltage: 35 kV

Injector magnet and bouncer

  • 90 degree, R = 300 mm, ME/z2 = 9.8 amuㆍMeV
  • Bouncer frequency: 100 Hz
  • Maxumum bouncing voltage: 3 kV
  • Rising time: 100 us
  • Water cooling type

Analyzing magnet

  • 90 degree, R = 850 mm, ME/z2 = 63 amuㆍMeV
  • Water cooling type

High resolution detection system

  • Electrostatic analyzer (ESA) : 120 degree, R = 650 mm, ±60 kV
  • 12C measurement: a fixed Faraday cup
  • 13C or other isotope measurement: a movable Faraday cup
  • Rare isotope measurement: ΔE-E detector with 70 nm Si3N4 entrance window
  • Detector gas: Isobutane (8.4 mbar)

Supplementaries

Reduction System

  • 24 line automatic reduction system
  • Typical yield: >90%
  • Typical reduction time: 160 min
  • Base Vacuum: 1 x 10-6 torr
  • Cooling: cooled alcohol (-50°C) with a cooling machine
  • Computer control

10 Line Carbonate Treatment System

  • Conversion of carbonate samples to CO2
  • Typical conversion time: 3 hours
  • Water trap: alcohol cooled by refrigerator of -70°C
  • Base Vacuum: 1 x 10-6 torr
  • Applicable to air sample after simple modification

Fume Hood for chemical process

  • Acid-Alkali-Acid treatment
  • Applied samples: Wood and soil
  • Teflon coated
  • Heating plates

  • Sand blaster for sample surface cleaning

  • Microscope

  • Refrigerator for sample conservation

  • Centrifuge

  • Ultra-sonic cleaners

  • Water purification system