One-Piece Kumakhov Optics to Achieve Increased Control of X-Ray and Neutron Beams

基于毛细管的光学（Kumakhov光学）控制X射线 和低能中子束的多次反射 在小于临界角的情况下 光学已经证明了 形成会聚或准平行光束的能力。 等 受控束在许多X射线和中子中有应用。 材料分析技术。 虽然目前这一代人 Kumakhov光学可以提供实质性的好处， 约束限制了可实现的传输效率， 能量范围、对准和最小焦斑尺寸 产生的光束。 对于许多材料分析技术， 光束参数影响空间分辨率、检测 限制和测量时间。 将开发新一代库马霍夫光学器件， 改进X射线和中子束控制。 这些光学器件将 作为单件制造。 那些偏离的通道 光子或中子将在整个空间中具有可变的直径， 光学的长度。 第一阶段的工作将包括 X射线透射效率和出射的Carlo模拟 发散与这种结构，和实验测量 一些早期的单件式的X射线透射特性 原型 第二阶段将包括开发和测试全面的 功能一体式光学器件。 这样的光学系统可能 产生X射线或中子焦斑尺寸10 μ m和通道 能量为100 keV的X射线。

Capillary-based optics (Kumakhov optics) control X-ray and low-energy neutron beams by means of multiple reflections at less than the critical angle. Optics have demonstrated the capability to form convergent or quasi-parallel beams. Such controlled beams have applications in many X-ray and neutron material analysis techniques. Although the current generation of Kumakhov optics can provide substantial benefit, assembly constraints limit the achievable transmission efficiency, energy range, alignment, and minimum focal spot size of the resulting beam. For many material analysis techniques these beam parameters affect the spatial resolution, detection limits, and measurement time. A new generation of Kumakhov optics will be developed to improve X-ray and neutron beam control. These optics will be manufactured as a single piece. The channels which deflect the photons or neutrons will have variable diameters over the length of the optic. The Phase I effort will include Monte Carlo simulations of X-ray transmission efficiency and exit divergence with such structures, and experimental measurements of the X-ray transmission properties of a few early one-piece prototypes. Phase II would include development and testing of fully functional one-piece optics. Such optics could potentially produce X-ray or neutron focal spot sizes 10 >m and channel x-rays with energies 100 keV.