52 citations · 166 across the 12 of their papers we have counts for
15 papers
Continuous-Wave Operation at 30 MV/m of a Superconducting Radio-Frequency Gun Cryomodule with an Exchangeable Cathode Plug
T. Konomi, T. Xu, Y. Choi +30
A prototype 185.7 MHz superconducting radio-frequency (SRF) electron gun cryomodule has been developed for the proposed LCLS-II-HE Low Emittance Injector at SLAC. It has an in-situ…
Multipacting Processing in Cryomodules For LCLS-II And LCLS-II-HE
A. Cravatta, T. Arkan, D. Bafia +12
Multipacting (MP) is a phenomenon which can affect stability in particle accelerators and limit performance in superconducting radio frequency cavities. In the TESLA shaped, 1.3 GH…
Evaluation of predictive correlation between flux expulsion and grain growth for superconducting radio frequency cavities
Zu Hawn Sung, Paulina Kulyavtsev, Martina Martinello +3
A series of experiments were carried out in an effort to develop a simple method for predicting magnetic flux expulsion behavior of high purity niobium used to fabricate supercondu…
Narrow bandwidth active noise control for microphonics rejection in superconducting cavities at LCLS-II
Andrea Bellandi, Julien Branlard, Jorge Diaz Cruz +9
LCLS-II is an X-Ray Free Electron Laser (XFEL) commissioned in 2022, being the first Continuous Wave (CW) hard XFEL in the world to come into operation. To accelerate the electron…
Key directions for research and development of superconducting radio frequency cavities
S. Belomestnykh, S. Posen, D. Bafia +53
Radio frequency superconductivity is a cornerstone technology for many future HEP particle accelerators and experiments from colliders to proton drivers for neutrino facilities to…
Plasma Processing for In-Situ Field Emission Mitigation of Superconducting Radiofrequency (SRF) Cryomodules
M. Martinello, P. Berrutti, B. Giaccone +14
Field emission (FE) is one of the main limiting factors of superconducting radio-frequency (SRF) cavities operating in accelerators and it occurs whenever contaminants, like dust,…
Plasma Cleaning of LCLS-II-HE verification cryomodule cavities
Bianca Giaccone, Paolo Berrutti, Martina Martinello +14
Plasma cleaning is a technique that can be applied in superconducting radio-frequency (SRF) cavities in situ in cryomodules in order to decrease their level of field emission. We d…
LCLS-II-HE verification cryomodule high gradient performance and quench behavior
S. Posen, A. Cravatta, M. Checchin +43
An 8-cavity, 1.3 GHz, LCLS-II-HE cryomodule was assembled and tested at Fermilab to verify performance before the start of production. Its cavities were processed with a novel nitr…
Field emission mitigation studies in LCLS-II cavities via in situ plasma processing
Bianca Giaccone, Martina Martinello, Paolo Berrutti +7
Field emission is one of the factors that can limit the performance of superconducting radio frequency cavities. In order to reduce possible field emission in LCLS-II (Linac Cohere…
Low RF power plasma ignition and detection for in-situ cleaning of 1.3 GHz 9-cell cavities
P. Berrutti, B. Giaccone, M. Martinello +7
Superconducting Radio Frequency (SRF) cavities performance preservation is crucial, from vertical test to accelerator operation. Field Emission (FE) is still one of the performance…
The Importance of the Electron Mean Free Path for Superconducting RF Cavities
J. T. Maniscalco, D. Gonnella, M. Liepe
Impurity-doping is an exciting new technology in the field of SRF, producing cavities with record-high quality factor and BCS surface resistance that decreases with increasin…
Sensitivity of Niobium Superconducting Cavities to Trapped Magnetic Flux Dissipation
Dan Gonnella, John Kaufman, Matthias Liepe
Future particle accelerators such as the the SLAC ``Linac Coherent Light Source-II'' (LCLS-II) and the proposed Cornell Energy Recovery Linac (ERL) require hundreds of superconduct…
Nitrogen-Doped 9-Cell Cavity Performance in a Test Cryomodule for LCLS-II
Dan Gonnella, Ralf Eichhorn, Fumio Furuta +13
The superconducting RF linac for LCLS-II calls for 1.3 GHz 9-cell cavities with an average intrinsic quality factor Q0 of 2.7x10^10 at 2 K and 16 MV/m accelerating gradient. Two ni…
Thermocurrents and their Role in high Q Cavity Performance
R. Eichhorn, C. Daly, F. Furuta +12
Over the past years it became evident that the quality factor of a superconducting cavity is not only determined by its surface preparation procedure, but is also influenced by the…
On superconducting niobium accelerating cavities fired under N2-gas exposure
Ralf Eichhorn, Daniel Gonnella, Georg Hoffstaetter +2
The dependence of the Q-value on the RF field (Q-slope) is actively studied in various accelerator laboratories. Although remedies against this dependence have been found, the phys…