Cristian Pira
(LNL)
10/9/18, 2:40 PM
Advanced preparation of substrates and atmospheric plasmas
Thin film technology moves the surface preparation from Nb to Cu, because the Nb thin film cannot be chemical treated. For the Nb on Cu resonant cavities two principal copper cleaning and polishing treatments were studied: one is the electropolishing (EP) and the other one is the chemical polishing with SUBU solution. The influence of surface preparation is deeply studied in bulk Nb cavities...
Martina Martinello
(Fermilab)
10/9/18, 3:05 PM
Advanced preparation of substrates and atmospheric plasmas
Field emission is one the major limitations to the maximum usable accelerating gradient of SRF cavities in cryomodules. Taking advantage of the plasma chemistry, field emitting and decreasing the field emission. A collaboration between FNAL, SLAC and ORNL was established to develop a plasma processing system capable to minimize and overcome the problem of field emission in LCLS-II cryomodules....
Mr
Oleksandr Hryhorenko
(IPNO)
10/9/18, 3:30 PM
Advanced preparation of substrates and atmospheric plasmas
The reduction of construction and operation costs are major aims for future superconducting radio-frequency (SRF) applications. So as to reduce the construction cost of the particle accelerators, the standard expensive chemical treatments (electropolishing (EP) or buffered chemical polishing (BCP)) of bulk Niobium (Nb) cavities can be significantly reduced or even suppressed thanks to...
Prof.
Arturs Medvids
(Riga Technical University)
10/9/18, 3:55 PM
Advanced preparation of substrates and atmospheric plasmas
The properties of Nb thin films deposited on planar Cu substrate were studied after its laser annealing. Five samples were prepared employing different substrate preparation techniques and were subsequently coated with 3-µm thick Nb film with the same deposition parameters. Afterwards, the Nb films were irradiated using Nd:YAG laser in order to increase crystallinity and improve adhesion of...
