Bibliographic Details
| Title: |
Highly spin-polarized multi-GeV electron beams generated by single-species plasma photocathodes |
| Authors: |
Nie, Zan, Li, Fei, Morales, Felipe, Patchkovskii, Serguei, Smirnova, Olga, An, Weiming, Zhang, Chaojie, Wu, Yipeng, Nambu, Noa, Matteo, Daniel, Marsh, Kenneth A., Tsung, Frank, Mori, Warren B., Joshi, Chan |
| Publication Year: |
2022 |
| Subject Terms: |
Physics - Plasma Physics, Physics - Accelerator Physics, Physics - Atomic Physics, Physics - Optics |
| More Details: |
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.
Comment: 3 figures |
| Document Type: |
Working Paper |
| Access URL: |
http://arxiv.org/abs/2206.09017 |
| Accession Number: |
edsarx.2206.09017 |
| Database: |
arXiv |
