Micro-XAS Using Tapered Capillary Concentrating Optics

S. M. Heald, D. L. Brewe, B. Barg, K. H. Kim, F. C. Brown, E. A. Stern

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


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/μm2 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 1010 ph/sec/μm2 at an APS undulator, indicating that sub-μm XAS is possible.

Original languageEnglish
Pages (from-to)C2-297-C2-301
JournalJournal De Physique. IV : JP
Issue number2 Part 1
StatePublished - 1997
Externally publishedYes


Dive into the research topics of 'Micro-XAS Using Tapered Capillary Concentrating Optics'. Together they form a unique fingerprint.

Cite this