Center for Bright Beams Post-doctoral Research Associate
Project – Development of ultra-bright photocathode materials
Background and Description –
The Center for Bright Beams (CBB) is a multi-institutional NSF funded Science and Technology Center based at Cornell University with the goal of developing orders of magnitude brighter electron beams that will transform various electron beam applications such as Free Electron Lasers and Ultrafast Electron Microscopes. For such applications, the brightness of electron beams (phase space charge density) is limited by the source of electrons (the photo-emitter) . Thin semiconducting films of alkali-antimonides are the brightest known photoemitters to-date. However, the process of photoemission from such thin films is poorly understood.
The goal of this project is to perform in-situ optical, electronic and surface characterizations of alkali-antimonide thin films to investigate their electronic and surface properties and utilize the information to develop a detailed understanding of the photoemission process in such thin films. While being located at Arizona State University in Tempe, the successful candidate is expected to work collaboratively with researchers at various CBB participating institutes including Cornell University, UCLA and the Lawrence Berkeley National Lab to develop and use in-situ optical, electronic and surface characterization techniques to study various brightness diluting effects related to electron heating and surface non-uniformities in alkali-antimonides and related materials and develop growth techniques which will mitigate these effects pushing the limits of electron beam brightness.
 Advances in bright electron sources, P. Musumeci et al, Nucl. Instrum. Methods Phys. Res. A (2018) https://doi.org/10.1016/j.nima.2018.03.019
A Ph.D. or an equivalent degree in experimental physics, material science, or chemistry is required. The candidate should have a demonstrated track record of effectively communicating research through conference presentations and/or journal papers.
Desired skills and Experience –
Candidates with one or more of the skills below will be preferred:
- · Expertise in UHV surface science techniques.
- · Experience in optical, electrical and/or surface characterization of materials and thin films.
- · Epitaxial thin film growth.
- · Demonstrated ability of successfully working in a group.
Applications should be submitted above in one complete attachment. Please include a cover letter, a CV, a publication list, and a detailed summary of research experience and interests, and 3 references. For information about the position, contact the selection committee chair Prof. Siddharth Karkare, Department of Physics, Arizona State University via email at firstname.lastname@example.org.
The ideal start date will be 1st October, however, there a couple of months of flexibility can be accommodated. The posting will remain open until a suitable candidate has been selected.