Stimulated Raman Adiabatic Passage for Improved Performance of a Cold Atom Electron and Ion Source
| Autor: | Sparkes, B. M., Murphy, D., Taylor, R. J., Speirs, R. W., McCulloch, A. J., Scholten, R. E. |
|---|---|
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 94, 023404 (2016) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.94.023404 |
| Popis: | We implement high-efficiency coherent excitation to a Rydberg state using stimulated Raman adiabatic passage in a cold atom electron and ion source. We achieve an efficiency of 60% averaged over the laser excitation volume with a peak efficiency of 82%, a 1.6 times improvement relative to incoherent pulsed-laser excitation. Using pulsed electric field ionization of the Rydberg atoms we create electron bunches with durations of 250 ps. High-efficiency excitation will increase source brightness, crucial for ultrafast electron diffraction experiments, and coherent excitation to high-lying Rydberg states could allow for the reduction of internal bunch heating and the creation of a high-speed single ion source. Comment: 9 pages, 6 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|