JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@inproceedings{petersen:srf2021-wepcav015, author = {T.B. Petersen and G. Chen and M.V. Fisher and M. Kedzie and M.P. Kelly and P. Piot and T. Reid}, % author = {T.B. Petersen and G. Chen and M.V. Fisher and M. Kedzie and M.P. Kelly and P. Piot and others}, % author = {T.B. Petersen and others}, title = {{Refurbishment and Testing of the WiFEL E-Gun at Argonne}}, booktitle = {Proc. SRF'21}, % booktitle = {Proc. 20th International Conference on RF Superconductivity (SRF'21)}, pages = {627--631}, eid = {WEPCAV015}, language = {english}, keywords = {cavity, FEL, gun, electron, cathode}, venue = {East Lansing, MI, USA}, series = {International Conference on RF Superconductivity}, number = {20}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {10}, year = {2022}, issn = {2673-5504}, isbn = {978-3-95450-233-2}, doi = {10.18429/JACoW-SRF2021-WEPCAV015}, url = {https://jacow.org/srf2021/papers/wepcav015.pdf}, abstract = {{We report on the refurbishment and testing of the Wisconsin Free Electron Laser (WiFEL) superconducting radiofrequency electron gun with application as an electron injector for DOE accelerators and as a possible future stand-alone tool for electron microscopy. Initial testing at ANL showed the cavity had a very low quality factor, ~10⁷, later determined to be due to contamination some-time since the initial assembly. Following ultrasonic cleaning, high-pressure water rinsing, reassembly, and cold testing, the e-gun has largely recovered with Q~10⁹ and surface electric fields ~15 MV/m. We intend that WiFEL be available as a testbed for future high brightness sources and, in particular, for testing an SRF gun photocathode loader design; an essential, and as yet, not sufficiently proven technology. We report here on many operationally important properties of a quarter-wave SRF cavity for application as an e-gun, including microphonics, pressure sensitivity, and mechanical tuning. New electromagnetic simulations show that the WiFEL cavity shape and design can be optimized in several respects.}}, }