Micro-focus computed tomography for turbine blade based on all-optical bremsstrahlung source

Guo Bo; Liu Dexiang; Wu Shuanghua; Ma Yue; Hua Jianfei; Lu Wei

doi:10.11884/HPLPB202133.210201

Volume 33 Issue 7

Jul. 2021

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Guo Bo, Liu Dexiang, Wu Shuanghua, et al. Micro-focus computed tomography for turbine blade based on all-optical bremsstrahlung source[J]. High Power Laser and Particle Beams, 2021, 33: 074001. doi: 10.11884/HPLPB202133.210201

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Micro-focus computed tomography for turbine blade based on all-optical bremsstrahlung source

doi: 10.11884/HPLPB202133.210201

Guo Bo^1
,,
Liu Dexiang¹,
Wu Shuanghua¹,
Ma Yue²,
Hua Jianfei¹,
Lu Wei^{1
,
,}

1.
Department of Engineering Physics, Tsinghua University, Beijing 100084, China
2.
Technology Transfer and Industrialization Center, Beijing Academy of Quantum Information Sciences, Beijing 100193, China

Received Date: 2021-05-25
Rev Recd Date: 2021-07-05

Available Online: 2021-07-13

Publish Date: 2021-07-15

Abstract

Abstract

Computed tomography is a major technique for nondestructive detection of internal defects of dense materials and large-size devices. It is widely used in material science, railway, aerospace, national defense, military industry and other industries. At present, conventional high-energy industrial computed tomography system uses the X-ray source based on traditional thermionic RF electron gun, which can only provide millimeter source size, thus limiting its imaging spatial resolution. A high-energy micro-focus X-ray source is the key means to realize high-resolution high-energy industry computed tomography. As an emerging accelerator technology, the laser wakefield accelerator is a promising candidate for the micro-focus high-energy industrial computed tomography. This article reports experimental results of a micro-focus X-ray source based on laser wakefield acceleration and a computed tomography for a turbine blade. Using a 20 TW Ti: sapphire laser system, an electron beam with a charge of (140±44) pC is generated through ionization-induced injection, and then an all-optical bremsstrahlung X-ray source with an accumulated source size of 25 μm is obtained by using a 1.5 mm tungsten target. Using this source, a preliminary compressed-sensing-based computed tomography for a turbine blade is performed.

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References

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