Micro-focus computed tomography (CT), which allows the hyperfine structure within objects to be reconstructed, is a powerful nondestructive testing tool in many fields. However, current x-ray sources for micro-focus CT are typically limited by their relatively low photon energy and low flux. An all-optical inverse Compton scattering source (AOCS) based on laser wakefield acceleration can generate intense quasi-monoenergetic x/gamma-ray pulses in the kilo- to megaelectronvolt range with micrometer-level source size, and its potential application for micro-focus CT has become very attractive in recent years because of the rapid progress made in laser wakefield acceleration. Reported here is a successful experimental demonstration of high-fidelity micro-focus CT using an AOCS (∼70 keV) by imaging and reconstructing a test object with complex inner structures. A region-of-interest CT method is adopted to utilize the relatively small field of view of the AOCS to ensure high spatial resolution. This demonstration of AOCS-based region-of-interest micro-focus CT is a key step toward its application in the field of hyperfine nondestructive testing.

中文翻译：

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基于全光逆康普顿散射源的感兴趣区域微焦点计算机断层扫描

微焦点计算机断层扫描 (CT) 可以重建物体内的超精细结构，是许多领域中强大的无损检测工具。然而，目前用于微焦点 CT 的 X 射线源通常受到其相对低的光子能量和低通量的限制。基于激光尾场加速的全光逆康普顿散射源 (AOCS) 可以产生千伏到兆电子伏范围的强准单能 x/伽马射线脉冲，源尺寸为微米级，及其在微聚焦方面的潜在应用近年来，由于激光尾场加速的快速发展，CT 变得非常有吸引力。这里报告了使用 AOCS (∼70 keV) 通过对具有复杂内部结构的测试对象进行成像和重建的高保真微焦点 CT 的成功实验演示。采用感兴趣区域 CT 方法，利用 AOCS 相对较小的视场，以确保高空间分辨率。这种基于 AOCS 的感兴趣区域微焦点 CT 的演示是其在超精细无损检测领域应用的关键一步。