Photocathode Laser Development for Superconducting X-Ray Free Electron Lasers at DESY
| Autor: | Li, Chen, Akcaalan, Oender, Frede, Maik, Grosse-Wortmann, Uwe, Hartl, Ingmar, Mohr, Christian, Puncken, Oliver, Seidel, Marcus, Tuennermann, Henrik, Vidoli, Caterina, Winkelmann, Lutz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | [Geneva] : JACoW Publishing, Geneva, Switzerland 3 pp. (2021). doi:10.18429/JACOW-IPAC2021-WEPAB379 12th International Particle Accelerator Conference, IPAC21, Campinas, Brazil, 2021-05-24-2021-05-28 |
| DOI: | 10.3204/pubdb-2021-04280 |
| Popis: | 12th International Particle Accelerator Conference, IPAC2021, Campinas, Brazil, 24 May 2021 - 28 May 2021; [Geneva] : JACoW Publishing, Geneva, Switzerland 3 pp. (2021). doi:10.18429/JACOW-IPAC2021-WEPAB379 Modern X-Ray Free-Electron Lasers (XFEL) are a key tool to enable a variety of scientific research. Those large-scale machines rely on robust and reliable deep ultraviolet (DUV) laser sources to drive electrons from their RF photocathode gun. In this paper we present a new photocathode laser prototype, which offers more flexibility in duration and shape of the 257.5 nm pulses for driving the CsTe Photocathodes of DESY���s superconducting burst-mode FELs. The laser matches the FEL pulse structure, which are 800 ��s bursts at up to 4.5 MHz intraburst-rate with 10 Hz burst-repetition-rate. In a first version the system will offer variable DUV pulse durations, tunable from 1 ps to 20 ps to address different operational regimes of the XFEL. The laser system comprises a high-resolution spectral shaper with the option of generating flat-top DUV pulses for reducing electron-beam emittance at a later version. The laser is constructed in a hybrid Yb:fiber and Yb:YAG architecture. Our prototype delivers 180 uJ pulse energy at 1030 nm and 1 MHz intra-burst rate and we demonstrated conversion of 50��J of the NIR beam to DUV, resulting 11.5��J at 21ps (FWHM) and 6.15 ��J at 1.05 ps (FWHM) pulse duration. Published by JACoW Publishing, Geneva, Switzerland, [Geneva] |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|