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RIS citation export for TUPGW108: Characterization of NEG Coatings for SLS 2.0

AU  - Dehler, M.M.
AU  - Alberti, S.
AU  - Citterio, A.
AU  - Hahn, M.
AU  - Hogge, J.P.
AU  - Liu, X.Y.
AU  - Marques, H.P.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Characterization of NEG Coatings for SLS 2.0
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - To limit desorption and ameliorate pumping of the narrow 20 mm aperture vacuum chamber of SLS2.0, it is planned to fully coat it with nonevaporable getter (NEG) material. NEG coating can be produced with different structural characteristics, from dense films to columnar growth, with corresponding distinct electrical properties affecting the machine impedance and the instability threshold of the accelerator. In order to evaluate and characterize the coating process for geometries similar to the SLS chamber, we measured the resonance properties of coated and uncoated shorted waveguide pieces. First tests were done with standard X band waveguides at 12 and 7 GHz. Test setups using elliptical cross sections are in preparation, also for higher frequencies allowing the characterization of thin NEG layers. The final goal is to have a standardized process to test of samples coated by external producers. We describe the setups and first results.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1662
EP  - 1665
KW  - impedance
KW  - resonance
KW  - coupling
KW  - vacuum
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPGW108
UR  - http://jacow.org/ipac2019/papers/tupgw108.pdf
ER  -