JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@unpublished{nie:napac2022-weyd5, author = {Z. Nie and W. An and C. Joshi and F. Li and K.A. Marsh and D. Matteo and F. Morales and W.B. Mori and N. Nambu and S. Patchkovskii and O. Smirnova and F.S. Tsung and Y.P. Wu and C. Zhang}, % author = {Z. Nie and W. An and C. Joshi and F. Li and K.A. Marsh and D. Matteo and others}, % author = {Z. Nie and others}, title = {{Highly Spin-Polarized Multi-GeV Sub-Femtosecond Electron Beams Generated From Single-Species Plasma Photocathodes}}, % booktitle = {Proc. NAPAC'22}, booktitle = {Proc. 5th Int. Particle Accel. Conf. (NAPAC'22)}, language = {english}, intype = {presented at the}, series = {International Particle Accelerator Conference}, number = {5}, venue = {Albuquerque, NM, USA}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {10}, year = {2022}, note = {presented at NAPAC'22 in Albuquerque, NM, USA, unpublished}, abstract = {{High-gradient and high-efficiency acceleration in plasma-based accelerators has been demonstrated, showing its potential as the building block for a future collider operating at the energy frontier of particle physics. However, generating and accelerating the required spin-polarized beams in such a collider using plasma-based accelerators has been a long-standing challenge. Here we show that the passage of a highly relativistic, high-current electron beam through a single-species (ytterbium) vapor excites a nonlinear plasma wake by primarily ionizing the two outer 6s electrons. Further photoionization of the resultant Yb²⁺ ions by a circularly polarized laser injects the 4f14 electrons into this wake generating a highly spin-polarized beam. Combining time-dependent Schrodinger equation simulations with particle-in-cell simulations, we show that a sub-femtosecond, high-current (4 kA) electron beam with up to 56% net spin polarization can be generated and accelerated to 15 GeV in just 41 cm. This relatively simple scheme solves the perplexing problem of producing spin-polarized relativistic electrons in plasma-based accelerators.}}, }