Beam Parameters
FACET-II was commissioned 2020 - 2021. The first full year of User programs with 10 GeV compressed electron beams is began in the fall of 2021 and ran until August 2022.
| Electron Beam | |
|---|---|
| Beam Type | e- |
| Beam energy (GeV) | 10 |
| Repetition Rate (Hz) (range) | 10 1-30 |
| Bunch Charge (nC) (range) | 2 0.5-3 |
| Bunch Length (σ, µm) (range) | 20 1-100 |
| Beam Spot size (σ, µm) (range) | 30 5-200 |
Facility staff can work with users to develop beam configurations that match their needs.
Three configurations are currently planned, designed to serve the priority experiments at FACET-II.
1. Single Bunch, high Ipk: Ipk 50-300kA , β* x,y=0.1-1m
2. 2-bunch: 1.5/0.5 nC, 30/15 | 20/10 kA, dz=150 μm, β* x,y=5-50cm
3. Single Bunch, high E, low δE, low aberrations: E=13GeV, σz=100μm, β* x,y=10m
A presentation at the 2019 Science Workshop provides more information.
The first configuration (single bunch, high I peak) will be developed in the fall of 2021 for experiment time in 2022. The second configuration (2-bunch) will be developed subsequently for experiment time later in 2022.
