Precision Engineering and Nanopositioning Team
Bonding of the MLL Optics and Novel Positioning Techniques Using MEMS Technology
Emergence of the ultrabrilliant synchrotron sources and recent advances in the development of efficient x-ray focusing optics stimulated significant efforts aimed to generate and use x-ray nanobeams in many areas of science and technology. Advanced beamline, such as HXN, is commissioned and delivers cutting edge imaging results with unprecedented spatial resolution utilizing MLL nanofocusing optics. Alignment of two 1D MLL optic is a complex procedure which involves eight degrees of motion and requires nm-scale resolution and nm-scale long-term stability. To push the resolution even further and achieve 5 nm and below focal spot size we are targeting novel approach to achieve nanofocusing. We are developing a pre-aligned, bonded 2D MLL optics to minimize a number of motions needed for positioning of MLLs with respect to the sample. This approach will scale down the size of the next generation microscope itself and in combination with optics development, will provide a route for imaging experiments with spatial resolution of 5 nm and below.
Sample Manipulation Apparatus for Serial Protein Crystallography at Full Flux
The flux density of the MX beamlines at the NSLS-II surpasses the flux density of comparable beamlines around the world by orders of magnitude. The dramatic performance improvement offers great opportunities for scientific studies however the expected lifetime of samples falls into the ms range. In collaboration with the FMX team (link to FMX) we are developing a novel, ultra-high-speed, high precision goniometer system to support scanning serial protein crystallography measurements and benefit from the flux density of the NSLS-II. The system will enable up to 5 Hz rotational speeds with simultaneous scanning frequencies on the order of 100 Hz, making it the fastest sample manipulation apparatus in the protein crystallography community.
Development of the TXM System for FXI Beamline
FXI beamline is currently under construction, and it targets tomographic imaging of various samples with the spatial resolution of 30 nm in 3D. The endstation is being developed in-house and will utilize some of the optical components available from a previous TXM microscope. The concept of a high stability microscope, which utilizes previous design experiences acquired during various projects, has been developed. In collaboration with the FXI team (link to FXI beamline) detailed layout, some prototyping and testing are being carried out.
Development of a Test Microscope for Kinoform Lenses
Kinoform lenses have been proposed and developed as an alternative way to provide x-ray focusing. In collaboration with the ISR scientists (link to Ken at ISR) a prototype instrument suitable for testing and focusing experiments utilizing kinoform lenses is being constructed. Nm-scale positioning along with the interferometric control are being implemented to enhance performance of the developed system.
