Measurement of Cu-Doped Be Gradient Steps in Sputtered Be Capsules

Cook, B

Lawrence Livermore National Laboratory

关键词: Copper;    37 Inorganic, Organic, Physical And Analytical Chemistry;    36 Materials Science;    71 Classical And Quantum Mechanics, General Physics;    Design;   

DOI  :  10.2172/892788
RP-ID  :  UCRL-TR-203445
RP-ID  :  W-7405-ENG-48
RP-ID  :  892788

美国|英语

来源: UNT Digital Library

【 摘 要 】

The purpose of this memo is to lay the groundwork for non-destructively determining the position and ultimately the concentration of Cu gradient steps in sputtered Be capsules (or Ge steps in CH capsules) by ''simple'' radiography. A second personal objective was for me to learn something about radiography, and for that reason this memo may be more detailed than necessary. Steve Haan has suggested a design for Be capsules that makes use of a gradient of Cu-doping in a sputtered Be shell. The capsule for a 300 eV design is shown in Figure 1. The question that this memo wants to address is whether the copper concentration boundaries (and ultimately the concentration itself) can be seen and measured with our radiography system. I will focus only on the relative opacities, and not get into the practicalities of film reading, lateral resolution and the like. I will assume a monochromatic 8 keV source; clearly there are other sources and filters that can be used, as well as the fact that the source is not monochromatic. So given all these approximations lets proceed.