HERMES is developing a new soft X-ray microscopy approach (Ptychography) that enables to reach ultimate spatial resolution well bellow 10nm. The resolution in standard X-ray microscopes is limited by the focusing element, e.g. Fresnel Zone Plates (FZP), and stays in the range of 20 nm for highly efficient zone plates. Diffraction imaging techniques with the use of coherent X-ray radiation potentially can achieve wavelength-limited resolution solving so-called “phase problem”. During the last years with steadily increasing computing power, which is necessary for the iterative image reconstructions, these methods became highly efficient for high-resolution imaging. Ptychography is the combination of diffraction imaging and scanning transmission microscopy that provides images of extended sample areas utilizing iterative reconstruction algorithm, which gives phase and amplitude information from the studied specimens. The main purpose of this postdoctoral position is the realization of ptychographic imaging on the samples with different scattering power, as well as the investigation and improvement of the microscopic potential of this method in detailed comparison with conventional STXM imaging.
The PostDoc position will be open starting from the first half of 2019. The successful candidate will be in charge of the development, implementation and commissioning of the Ptychography setup on HERMES beamline under the supervision of the beamline responsible. Once the setup validated, the candidate will participate in supporting external users of the Ptychography setup (both academic and industrial) in order to meet the anticipated increased demand. This involves both operating the Ptychography setup and data processing.
Once the Ptychography setup validated the successful candidate will be in charge of the development of high-resolution XMCD Ptychography measurements for studying nanomagnetic materials in close collaborations with our beamline partners:
Beside of this, the candidate will also participate to the general operation of the beamline. He/she will take part to the users support program as well as in the beamline preparation, development and maintenance.
Finally the candidate may propose their own research topic compatible with the techniques proposed by the beamline and the scientific themes addressed.
The candidate should hold a Ph.D. or equivalent degree in Physics, Chemistry, Materials Science or a related discipline. Previous experience in a synchrotron radiation center will be much more appreciated.
The following aspects will be considered with the greatest attention: