Name: Kety Mayelin Jimenez Tejeda
Home Institution: UNIPD
Host Institution: RWTH
Cohort: 2015

Project Title

Design, Development and characterization of thin film filters for high brilliance sources in the UV-X-ray Spectral range


High brilliance sources such as synchrotron and Free Electron Laser (FEL) are very important nowadays due to their multiples application in the development of science and technology. One strong requirement on the beam delivered by these sources besides brilliance, coherence and bandwidth is often related to the spectral purity; in fact, the beam can be the superposition of various harmonics.  The rejection of high harmonics or diffuse light in order to improve the quality of the beam can be achieved by suitable optical systems acting as band pass filters.


Since materials present high absorption in the EUV spectral range, the selection of devices acting as filters in order to select suitable spectral bandwidth or reject harmonics is quite challenging. This project will be focused in the searching for potential materials, design, fabrication and characterization of self-standing transmittance thin films filters between 4-20 nm and 20-100nm spectral range, which correspond to intervals into the Extreme Ultraviolet and soft- x ray spectra Region, to be inserted along Synchrotron and Free Electron Laser (FEL) transport optics.

Some properties like fragility, resistance against oxidation and carbonation of the films and resistance to the high power of these light sources have to be taken in consideration.



Miss Kety Jimenez has graduated from Universidad Autonoma de Santo Domingo in Dominican Republic, with a Bachelor degree in Physics, in 2010. She earned her M.Sc. degree also in Physics from University of Puerto Rico, Rio Piedras Campus, 2013. She worked as a research assistant in the University of Puerto Rico Humacao Campus for her master thesis on Atomic Force Microscope Grain Size Analysis and Surface Shearing effects on PVDF(Tr-FE) Ferroelectric surface. Project funded by the Department of Defense of United States; Results were published in Ferroelectric, 2015.

She returned to her country to work as Teaching assistant at the Physics Department at the Universidad Autonoma de Santo Domingo. Miss. Jimenez joined EXTATIC Erasmus Mundus Joint Doctorate program in October 2015. Her project title is “Design, Development and characterization of thin film filters for high brilliance sources in the UV-X-ray Spectral range”.