'Journal of Accelerator Conferences Website' (JACoW) is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
| Title | Controlled Degradation of a Ag Photocathode by Exposure to Multiple Gases | |
| Authors |
|
|
| Abstract | The search for high performance photocathode electron sources is a priority in the accelerator science community. The surface characteristics of a photocathode define many important factors of the photoemission process including the work function, the intrinsic emittance and the quantum efficiency of the photocathode. These factors in turn define the ultimate electron beam quality, which is measurable as normalised emittance, brightness and energy spread. Strategies for improving these parameters vary, but understanding and influencing the relevant cathode surface physics which underpin these attributes is a primary focus for the community*. We present performance data under illumination at 266 nm for Ag (100) single-crystal cathode and a Ag polycrystalline cathode after progressive exposure to O₂, CO₂, CO and N₂ using our TESS** instrument both at room and cryogenic temperatures. Crucially the data shows the effect of progressive degradation*** in the photocathode performance as a consequence of exposure to controlled levels of O₂ and that exposing an oxidized Ag surface to CO can drive partial QE recovery. | |
| Footnotes & References | *K.L. Jensen; Appl. Phys. Lett. 89, 224103 (2006); **L.B. Jones et al.; Proc. FEL ’13, TUPPS033, 290-293; ***N. Chanlek et al.; J. Phys. D: Appl. Phys. (2014) 47, 055110; |
|
| Funding | STFC Doctoral Training Studentship | |
| Paper | download THPOPT034.PDF [0.719 MB / 4 pages] | |
| Cite | download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote | |
| Conference | IPAC2022 | |
| Series | International Particle Accelerator Conference (13th) | |
| Location | Bangkok, Thailand | |
| Date | 12-17 June 2022 | |
| Publisher | JACoW Publishing, Geneva, Switzerland | |
| Editorial Board | Frank Zimmermann (CERN, Meyrin, Switzerland); Hitoshi Tanaka (RIKEN, Hyogo, Japan); Porntip Sudmuang (SRLI, Nakhon, Thailand); Prapong Klysubun (SRLI, Nakhon, Thailand); Prapaiwan Sunwong (SRLI, Nakhon, Thailand); Thakonwat Chanwattana (SRLI, Nakhon, Thailand); Christine Petit-Jean-Genaz (CERN, Meyrin, Switzerland); Volker R.W. Schaa (GSI, Darmstadt, Germany) | |
| Online ISBN | 978-3-95450-227-1 | |
| Online ISSN | 2673-5490 | |
| Received | 07 June 2022 | |
| Revised | 10 June 2022 | |
| Accepted | 14 June 2022 | |
| Issue Date | 10 July 2022 | |
| DOI | doi:10.18429/JACoW-IPAC2022-THPOPT034 | |
| Pages | 2657-2660 | |
| Copyright |
|
