JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF AU - Biswas, J.P. AU - Cultrera, L. AU - Hawkins, S.D. AU - Kisslinger, K. AU - Klem, J.F. AU - Lee, S.R. AU - Liu, W. AU - Skarita, J. AU - Wang, E. ED - Biedron, Sandra ED - Simakov, Evgenya ED - Milton, Stephen ED - Anisimov, Petr M. ED - Schaa, Volker R.W. TI - Record Quantum Efficiency from Superlattice Photocathode for Spin Polarized Electron Beam Production J2 - Proc. of NAPAC2022, Albuquerque, NM, USA, 07-12 August 2022 CY - Albuquerque, NM, USA T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - Electron sources producing highly spin-polarized electron beams are currently possible only with photocathodes based on GaAs and other III-V semiconductors. GaAs/GaAsP superlattice (SL) photocathodes with a distributed Bragg reflector (DBR) represent the state of the art for the production of spin-polarized electrons. We present results on a SL-DBR GaAs/GaAsP structure designed to leverage strain compensation to achieve simultaneously high QE and spin polarization. These photocathode structures were grown using molecular beam epitaxy and achieved quantum efficiencies exceeding 15% and electron spin polarization of about 75% when illuminated with near bandgap photon energies. PB - JACoW Publishing CP - Geneva, Switzerland SP - 784 EP - 787 KW - electron KW - cathode KW - polarization KW - lattice KW - distributed DA - 2022/10 PY - 2022 SN - 2673-7000 SN - 978-3-95450-232-5 DO - doi:10.18429/JACoW-NAPAC2022-WEPA68 UR - https://jacow.org/napac2022/papers/wepa68.pdf ER -