| Autor: |
D. L. Brewe, K. H. Kim, Bill Barg, Steve M. Heald, F. C. Brown, Edward A. Stern |
| Rok vydání: |
1997 |
| Předmět: |
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| Zdroj: |
Le Journal de Physique IV. 7:C2-297 |
| ISSN: |
1155-4339 |
| Popis: |
Tapered capillary optics are a promising choice for producing micro-beams at third generation sources. The reproducible energy dependence of their X-ray transmission, and fixed output beam position make them well suited for micro-XAS applications. Fiber optics techniques have been developed to produce long (1 m) capillaries which provide a good match to the low divergence undulator beams at third generation sources. The results of X-ray tests made at the NSLS indicate the performance of many of the capillaries closely match theoretical values. Currently these provide a monochromatic beam of about 106 ph/sec/μm 2 at an unfocused bending magnet beamline. High quality X-ray images and micro-XAFS have been obtained at the NSLS with better than 3 μm resolution. The same capillaries should provide more than 10 10 ph/sec/μm 2 at an APS undulator, indicating that sub-μm XAS is possible. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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