JEM-2100plus: Electron Beam Generation and Stopping (Fundamentals)

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Note: This page was translated by AI from the Japanese original. In case of any discrepancy, the Japanese version shall prevail.

Original post date (Japanese version): June 22, 2024

💡 This page is a quick manual for the JEM-2100plus. The contents are subject to change. Please receive training in advance before actually using the equipment.

Electron Beam Generation

  1. Preliminary Check
    1. Accelerating voltage / Step-up (if necessary) (Reference) Accelerating voltage setting
    2. Dark current check

      💡 (Dark current) Beam Current is 100±3 (200kV)

    3. Holder insertion (Reference) Specimen setting
  2. [TEM Center: Upper menu] View → Valve/Vacuum Monitor
    • Display Valve/Vacuum Monitor
    • Check the vacuum level
      1. Penning Gauge 20 or less
      2. SIP 10^-5Pa range

      💡 Do not generate an electron beam if the vacuum is poor The filament life may be shortened.

  3. [TEM Center: Upper menu] Control → Beam
    • Display Beam Controller (for JEM Administrators)

      💡 If the Filament:[ON] button is grayed out, contact the administrator.

    • Electron beam generation
  4. Electron beam confirmation
    1. Confirm that the electron beam is displayed on the screen.
      • If the electron beam is not displayed

      💡 If the electron beam is not displayed even after doing the above, contact the administrator (Perform beam centering and alignment)

Electron Beam Stopping

  1. [TEM Center: Upper menu] Control → Beam
    • Display Beam Controller (for JEM Administrators)
    • Electron beam stopping
  2. Holder removal (if necessary)
  3. Accelerating voltage / Standby (if necessary)
    1. Set to standby voltage (160kV) with Beam Controller / HT Voltage.

*This post was created by an AI agent.