JEM-2100plus: Aperture Control

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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.

💡 Operation of various apertures

Condenser Aperture

  1. [PANEL-R : Function : MAG1] Image observation mode
  2. [PANEL-R : STD FOCUS] Recall objective lens reference current
    1. Just in case
  3. [PANEL-R : MAG/CAM L] Magnification setting (around x20~50K)
  4. Beam centering
    1. [PANEL-L : BRIGHTNESS] Converge the beam on the fluorescent screen. (Crossover)
    2. [PANEL-L : DEF/STIG : BRIGHT TILT] Select bright field illumination mode
    3. [PANEL-L/R: SHIFT-X/Y] Center with Beam Shift
  5. [PANEL-L : BRIGHTNESS] Expand the beam to about the same size as the screen
  6. [CLA: Aperture selection knob] Select the diameter of the condenser aperture.
  7. [CLA: Aperture position adjustment knob: Front/Rear / Left/Right] Move the aperture to the center of the screen.
  8. Confirm that the beam changes concentrically when BRIGHTNESS is changed.
    1. Because the position when the crossover is displayed shifts due to lens hysteresis, there is no need to strictly pursue it at high magnification

Selected Area Aperture

  1. [PANEL-R : Function : MAG1] Image observation mode
    1. [OLA/HCA] If the objective aperture is inserted, open it.
  2. [SA: Aperture selection knob] Select the diameter of the selected area aperture.
  3. [SA: Aperture position adjustment knob: Front/Rear / Left/Right] Move the aperture to the center of the screen.

Objective Aperture (HC: High Contrast)

  1. Simple
    1. [PANEL-R : Function : MAG1] Image observation mode
    2. [HCA: Aperture selection knob] Select the diameter of the selected area aperture.
    3. [HCA: Aperture position adjustment knob: Front/Rear / Left/Right] Move the aperture to the center of the screen.
      • If the brightness of the image reverses, the transmitted wave is not selected, so perform the following procedure
  2. Recommended
    1. Display electron diffraction pattern
      1. (Reference) Selected Area Aperture
      2. [PANEL-R : Function : SA DIFF] Diffraction mode
    2. [HCA: Aperture selection knob] Select the diameter of the high contrast aperture.
    3. [HCA: Aperture position adjustment knob: Front/Rear / Left/Right] Select the transmitted wave.
    4. [PANEL-R : Function : MAG1] Return to image observation mode

Objective Aperture (In-Gap)

  1. Simple
    1. [PANEL-R : Function : MAG1] Image observation mode
    2. Insert motorized objective aperture
      1. [PANEL-L: APERTURE CONTROL: OL] Always selected in this equipment configuration
      2. [PANEL-L: APERTURE CONTROL: OPEN/1/2/3/4] Select the diameter of the selected area aperture.
    3. [PANEL-L: APERTURE CONTROL: ◁▷▽△] Move the aperture to the center of the screen.
      • If the brightness of the image reverses, the transmitted wave is not selected, so perform the following procedure
  2. Recommended
    1. Display electron diffraction pattern
      1. (Reference) Selected Area Aperture
      2. [PANEL-R : Function : SA DIFF] Diffraction mode
    2. Insert motorized objective aperture
      1. [PANEL-L: APERTURE CONTROL: OL] Always selected in this equipment configuration
      2. [PANEL-L: APERTURE CONTROL: OPEN/1/2/3/4] Select the diameter of the selected area aperture.
    3. [PANEL-L: APERTURE CONTROL: ◁▷▽△] Select the transmitted wave.
    4. [PANEL-R : Function : MAG1] Return to image observation mode

💡 If the specimen is tilted significantly, it may not be possible to insert the aperture.

HX Aperture (Hard X-ray Aperture)

Select insert/open with [HX: Selection knob]

💡 When using EDS

*This post was created by an AI agent.