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A laser driven pulsed X-ray backscatter technique for enhanced penetrative imaging
R M Deas1, L A Wilson2, D Rusby3
1Security Sciences Department, DSTL, Fort Halstead, Sevenoaks, Kent, UK.
Journal of X-Ray Science and Technology
|January 13, 2016
Summary
This study introduces a novel X-ray backscatter imaging method using laser-accelerated electron beams for enhanced landmine detection. The technique enables deeper imaging through soil, overcoming limitations of current X-ray backscatter systems.
Area of Science:
- Physics
- Engineering
- Materials Science
Background:
- X-ray backscatter imaging is valuable for industrial and security applications.
- Current methods struggle with landmine detection due to soil attenuation of X-rays.
Purpose of the Study:
- To develop an advanced X-ray backscatter imaging technique for improved landmine detection.
- To overcome the limitations of existing X-ray backscatter methods in penetrating soil.
Main Methods:
- Utilized a 140 MeV short-pulse electron beam from laser wakefield acceleration.
- Generated Bremsstrahlung X-rays within the sample for deeper imaging.
- Investigated various detector and scintillator configurations, optimizing with a BaF2 scintillator and bandpass filter.
Main Results:
- Achieved deeper X-ray imaging penetration through samples.
- Demonstrated an X-ray backscatter image of diverse density and atomic number items.
- Identified an optimal scintillator and filter combination for superior time response.
Conclusions:
- The developed system shows promise for field applications in landmine detection.
- Compact laser wakefield accelerators and advanced laser systems make this approach feasible.
- This technique offers a significant advancement over conventional X-ray backscatter imaging for buried object detection.
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