Mr. Qiang Wang Profile

Qiang Wang

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 4 December 2024 Paper

Laser interferometric quadrature phase method for tokamak wall surface vibration measurements

Ang Li, Yuanbo Li, Qiang Wang, Ding Wu, Chunlei Feng, Hongbin Ding

Proceedings Volume 13283, 132832X (2024) https://doi.org/10.1117/12.3036980

KEYWORDS: Vibration, Vibrometry, Laser interferometry, Beam splitters, Photodiodes, Phase shifts, Signal processing

Read Abstract +

In order to realize the in-situ diagnosis of the surface morphology of Plasma-Facing materials (PFMs) in advanced superconducting tokamaks, such EAST, Dalian University of Technology has developed the Speckle Interference Experiment Platform (DUT-SIEP). In order to ensure high resolution, DUT-SIEP introduces a vibration-sensitive time phase-shifting technique. The influence of environmental vibration leads to a decrease in the accuracy of surface topography measurement for PFMs. Therefore, it is very important to in-situ characterize the vibrational parameters of tokamak device for vibrational disturbance compensation in PFMs surface topography measurement. To this issue, we propose an approach based on Laser Interferometric Quadrature Phase (LIQP) method for measurement of vibrational parameters of tokamak wall for improving the accuracy of surface topography measurement by compensating the phase error introduced by vibration disturbance. The vibration measurement is performed by obtaining two vibrational interferometric signals with phase difference due to the difference of the distance from two photodiodes to the beam splitter mirror, and correcting them to two signals with orthogonal phase difference by the least squares method. By using the inverse tangent calculation and phase unwrapping of the two orthogonal signals, the displacement of the vibrating target is reconstructed in real time. In order to simulate the actual working conditions of the EAST tokamak device, the amplitude and frequency measurements of different vibrations are carried out under the experimental conditions of a three-meter far field. The experimental results demonstrate the potential application of this method in the in situ measurement vibrational parameters of tokamak devices.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years