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Related Experiment Video

Updated: Apr 18, 2026

A Protocol for Real-time 3D Single Particle Tracking
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Note: O-ring stack system for electron gun alignment.

In-Yong Park1, Boklae Cho1, Cheolsu Han1

  • 1Korea Research Institute of Standards and Science (KRISS), Daejeon 305-340, South Korea.

The Review of Scientific Instruments
|February 2, 2015
PubMed
Summary
This summary is machine-generated.

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We developed a novel vacuum alignment method using O-rings for electron guns. This technique precisely adjusts beam direction and source position, crucial for charged particle instruments.

Area of Science:

  • Vacuum Technology
  • Particle Optics
  • Mechanical Engineering

Background:

  • Accurate alignment of electron guns is critical for performance in various scientific instruments.
  • Traditional alignment methods can be complex and time-consuming, especially under vacuum conditions.

Purpose of the Study:

  • To present a reliable and adaptable method for aligning electron guns within a vacuum environment.
  • To demonstrate precise control over beam direction and source position using a novel O-ring based system.

Main Methods:

  • Utilizing a stack of rubber O-rings to control height differences for precise beam tilting along two axes.
  • Implementing adjustments in three orthogonal directions to shift the electron source position.
  • Conducting alignment within a vacuum condition.

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Main Results:

  • Achieved precise beam tilting angles of ±2.55° along two axes.
  • Demonstrated linear shifts of ±2 mm along the x and y axes using ten stacked O-rings.
  • Validated the reliability of the O-ring based alignment system.

Conclusions:

  • The O-ring based method offers a simple yet effective solution for electron gun alignment in vacuum.
  • This technique is adaptable for other charged particle gun alignments and flange adjustments in vacuum systems.
  • The findings have potential applications in enhancing electrical insulation between vacuum flanges.