Lensless x-ray imaging with tabletop sources

sandberg_fig3.jpg This week’s item is the PRL paper by Sandberg et al., “Lensless Diffractive Imaging Using Tabletop Coherent High-Harmonic Soft-X-Ray Beams” Phys. Rev. Lett. 99, 098103 (2007).

It is essentially a collaboration between JILA/Colorado groups of Henry Kapteyn and Margaret Murnane specializing in coherent soft x-ray tabletop sources, and John Miao’s UCLA group which specializes in lensless imaging, as well as folks from LBNL. The fact that these are very “soft” x-rays – wavelengths of 29 nm means that the spatial resolution is still rather limited (on the order of 100-200nm), compared to synchrotron sources such as ALS or APS, but on the flip side they can do measurements in their in-house lab, instead of relying on scarce synchrotron beamtime, which is a huge benefit. Traditional x-ray sources such as rotating anode and fixed tube can typically operate in hard x-ray range (8keV and higher), but the energy is also fixed and the sources are very incoherent.

I am looking forward to the times when the tabletop sources can become cheap and commonplace enough for other groups to do their characterization using these and other coherent x-ray scattering probes.

Advertisements
This entry was posted in coherent, tabletop, xray. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s