Inspection of the diamond-turned surfaces used for mounting an array of eight x-ray reflection gratings
This paper describes the use of a T-base diamond-turning machine as a measuring machine for inspecting the positional accuracy of the diamond-tuned surfaces of four attachment rails--parts that resemble precision step gauges. The attachment rails provide the precision mounting surfaces for a prototype array of eight X-ray reflection gratings for the European Space Agency`s (ESA) X-ray Multi-Mirror project (XMM). Each rail is 4.5 in. long with a cross-section of less than 0.1 in{sup 2}, and has eight protruding bosses spaced approximately 0.5 in. apart (Figure 1). A diamond-turned feature on each boss provides a mounting surface for one of the four corners of a grating. These surfaces are 0.018 in. high by 0.1 in. wide, and have a 12 in. cylindrical radius with an axis parallel to the boss protrusion (Figure 2). Together, the four rails provide eight sets of four coplanar points for mounting the gratings (Figure 3). Note that the gratings are not parallel to each other; they sweep through a 12 mrad angle from the first to eighth grating. To accommodate this fanned array, the normal directions (denoted by arrows in Figure 1) of the mounting surfaces on the bosses, at the rail centerline, also sweep through a 12 mrad angle from the first to eighth boss.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10191324
- Report Number(s):
- UCRL-JC-115215; CONF-9311102-1; ON: DE93040845
- Resource Relation:
- Conference: American Society for Precision Engineering (ASPE) conference,Seattle, WA (United States),7-12 Nov 1993; Other Information: PBD: Nov 1993
- Country of Publication:
- United States
- Language:
- English
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