Alke Meents, Bernd Reime, Nicolas Stuebe, Pontus Fischer, Martin Warmer, Dennis Goeries, Jan Roever, Jan Meyer, Janine Fischer, Anja Burkhardt, Ismo Vartiainen, Petri Karvinen, Christian David
Beamline P11 at PETRA III is dedicated to structural investigations of biological samples. It provides two experimental
stations, one for macromolecular crystallography and one for X-ray microscopy. The microscope will provide full field
Zernike phase contrast and scanning microscopy both in 2D and in tomographic mode. Full field microscopy with a field
of view of 50 x 50 μm2 will allow to generate an overview of the sample and to select regions of interest for later
inspection of the element distribution by X-ray fluorescence and diffraction in scanning mode.
Central part of the microscope is an inhouse developed flexure based x,y,z scanner on top of a rotation stage. The
scanner is operated in closed loop with piezo motors, has a travel range of 4 mm in horizontal and of 3 mm in vertical
direction. With laser interferometers for closed loop operation a positioning accuracy of better than 5 nm is achieved in
all directions. For precise sample rotation an in-vacuum air-bearing has been developed. An open bore in the center of
the air-bearing allows cryogenic sample cooling by a cold He or N2 gas stream.
Different optical elements such as beam defining pinholes, a condensor, zone plates, OSA, phase rings, etc. can be
centered in the beam path by piezomotor driven x,y flexure elements mounted on a rail system which allows further
positioning along the beam path. Different 2D detectors and two fluoresence detectors can be attached to the microscope.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.