IPAC'23 - Student Poster Session Guide

IPAC’23 / STUDENT POSTER SESSION GUIDE 33 Student Poster Session SUPM056 On chip photonics integrated photocathodes Alimohammed Kachwala (Arizona State University) . Hyun Uk Chae, Ragib Ahsan, Rehan Kapadia (University of Southern California), Oksana Chubenko, Pallavi Saha, Siddharth Karkare (Arizona State University). Integrating the advances made in photonics with that of the photocathodes can result in the development of photonics integrated cathodes that can result in the development of next gen- eration electron sources for various accelerator applications. In such photocathodes, light can be directed using waveguides and other photonic components on the substrate underneath a thin (<100 nm) photoemissive film to generate electron emission from specific locations at sub-micron scales and at specific times at 100 femtosecond scales along with triggering novel photoemission mechanisms resulting in brighter electron beams and enabling unprecedented spatio-temporal shaping of the emitted electrons. In this work we have demonstrated photo- emission confined in the transverse direction using a nanofabricated Si3N4 waveguide under- neath a 40nm thick cesiated GaAs photoemissive film and <10 nm thick cesium antimonide photoemissive film. This work demonstrates a proof of principle feasibility of such photonics integrated photocathodes and paves the way to integrate the advances in the field of photonics and nanofabrication with photocathodes to develop next generation high brightness electron sources for various accelerator applications. SUPM057 Phase Space Measurements of an Electron Beam Using The ASU Cryocooled 200 kV DC Electron Gun Carlos Sarabia Cardenas, Gevork Gevorkyan (Arizona State University) . Siddharth Karkare (Arizona State University). The cryocooled DC electron gun at Arizona State University (ASU) is the first electron gun built to implement single-crystal, ordered surface and epitaxially grown photocathodes to produce cold and dense electron beams at the source. These high brightness electron sources are extremely desirable for ultrafast electron applications such as Xray Free Electron Lasers (XFELs), Ultra- fast Electron Diffraction/Microscopy (UED/UEM), and electron-ion colliders. Electron beams are produced from a cryogenically cooled photocathode using a tunable wavelength LASER to emit electrons close to the photoemission threshold. The full four-dimensional transverse phase space of the electron beam can be measured by a single pinhole scan technique, allowing us to directly calculate the transverse emittance in both dimensions. In this contribution we report and discuss the beamline setup and first measurement results. SUPM058 Demonstration of transverse stability in an alternating symmetry planar dielectric structure Gerard Andonian, James Rosenzweig, Nathan Majernik, Walter Lynn (University of California, Los Angeles) , John Power (Argonne National Laboratory), Seongyeol Kim (European Organization for Nu- clear Research).