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{konomi:srf2023-tuptb069,
author = {T.K. Konomi and C. Adolphsen and S. Gatzmaga and W. Hartung and M.P. Kelly and S.H. Kim and J.W. Lewellen and S.J. Miller and D.G. Morris and P. Murcek and T.B. Petersen and K. Saito and J. Smedley and A.T. Taylor and R. Xiang and L. Xiao and T. Xu and Z.Y. Yin},
% author = {T.K. Konomi and C. Adolphsen and S. Gatzmaga and W. Hartung and M.P. Kelly and S.H. Kim and others},
% author = {T.K. Konomi and others},
title = {{Design and Tests of a Cathode Stalk for the LCLS-II-HE Low Emittance Injector SRF Gun}},
% booktitle = {Proc. SRF'23},
booktitle = {Proc. 21th Int. Conf. RF Supercond. (SRF'23)},
pages = {589--592},
eid = {TUPTB069},
language = {english},
keywords = {cathode, gun, SRF, emittance, operation},
venue = {Grand Rapids, MI, USA},
series = {International Conference on RF Superconductivity},
number = {21},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {09},
year = {2023},
issn = {2673-5504},
isbn = {978-3-95450-234-9},
doi = {10.18429/JACoW-SRF2023-TUPTB069},
url = {https://jacow.org/srf2023/papers/tuptb069.pdf},
abstract = {{A SRF gun can operate CW with a high gradient and ultra-low vacuum for high-quantum efficiency, low MTE photocathodes, useful features for delivery of high-brightness, high-repetition-rate beams. For these reasons, an SRF gun based photoinjector was chosen for a proposed Low Emittance Injector addition to the LCLS-II-HE facility, which will operate CW with bunch rates up to 1 MHz. For this injector, a prototype 185.7 MHz QWR gun is being developed in a collaborative effort among FRIB, HZDR, ANL and SLAC, with the goal of achieving a photocathode gradient of at least 30 MV/m. The photocathode is held by a coaxial fixture (cathode stalk) for thermal isolation from the cavity body. The system must allow for precise alignment of the photocathode, particle-free photocathode exchange, cryogenic (55-70 K) or warm (273-300 K) photocathode operating temperatures, and DC biasing to inhibit multipacting. A prototype cathode stalk has been built and bench tests are underway to validate the design. Measurements include RF power dissipation, DC bias hold-off, multipacting suppression and heat transfer effectiveness. This paper describes the cathode stalk design and the test results.}},
}