| 摘要 |
<p>A micro-channel plate for use in focusing X-rays or particles of equivalent wavelengths comprises a radially packed array of square pores (12). For focussing parallel rays, a micro-channel plate consisting of two, square-pore, spherically slumped radially packed micro-channel plate elements (14,15) of different radii of curvature and overlying one another, forming for example a concavo-convex compound plate, is capable of providing a greater effective area at high X-ray energies. <IMAGE></p> |
