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Related Concept Videos

Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

985
One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
985
Plastic Deformation in Circular Shafts01:20

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When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
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Investigating the Potential of Singly Curved Thin Piezoelectric Transducers for Energy Harvesting and Structural Health Monitoring
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Published on: November 14, 2025

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Atom shutter using bender piezoactuator.

Huidong Kim1, Won-Kyu Lee1, Dai-Hyuk Yu1

  • 1Center for Time and Frequency, Korea Research Institute of Standards and Science, Daejeon 34113, South Korea.

The Review of Scientific Instruments
|March 3, 2017
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Summary
This summary is machine-generated.

A novel piezoelectric atom shutter precisely controls atomic beams. This durable device offers fast, stable operation, achieving millions of cycles in vacuum and atmospheric conditions.

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Area of Science:

  • Atomic Physics
  • Mechanical Engineering
  • Materials Science

Background:

  • Precise manipulation of atomic beams is crucial for various scientific applications.
  • Existing atom shutter technologies may face limitations in speed, stability, or operational lifetime.
  • The development of robust and efficient atom manipulation tools is an ongoing research area.

Purpose of the Study:

  • To develop and characterize a novel flag-type atom shutter.
  • To utilize a bender piezoelectric actuator for driving the shutter mechanism.
  • To evaluate the shutter's performance in terms of speed, stability, and operational lifetime, particularly in ultra-high vacuum environments.

Main Methods:

  • Designed a flag-type atom shutter incorporating a rotating lever mechanism.
  • Employed a bender piezoelectric actuator for precise control of the shutter's movement.
  • Tested shutter speed, mechanical vibrations, cycle-to-cycle stability, and long-term operational lifetime under vacuum and atmospheric conditions.

Main Results:

  • The shutter achieved a shutter time of 13 ms with minimal mechanical vibrations.
  • Demonstrated high short-term (0.03 ms) and long-term (0.02 ms) shutter time stability.
  • Reached operational lifetimes of 2.0 × 106 cycles in ultra-high vacuum and 2.6 × 107 cycles in atmosphere, showing compatibility with low vacuum levels (10-7 Pa).

Conclusions:

  • The developed piezoelectric atom shutter provides a fast, stable, and durable solution for atomic beam manipulation.
  • The device exhibits excellent performance and longevity, suitable for demanding ultra-high vacuum applications.
  • This technology offers a promising advancement for experiments requiring precise control of atomic particle flows.