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RIS citation export for THPO002: Investigation of SRF Elliptical Cavities Made by New Nb Materials in KEK

AU  - Dohmae, T.
AU  - Okada, T.
AU  - Umemori, K.
AU  - Watanabe, Y.
AU  - Yamanaka, M.
ED  - Schaa, Volker RW
ED  - Pei, Guoxi
ED  - Chin, Yong Ho
ED  - Fu, Shinian
ED  - Zhao, Ning
TI  - Investigation of SRF Elliptical Cavities Made by New Nb Materials in KEK
J2  - Proc. of LINAC2018, Beijing, China, 16-21 September 2018
CY  - Beijing, China
T2  - Linear Accelerator Conference
T3  - 29
LA  - english
AB  - Cost reduction for cavity fabrication is currently main issue to realize international linear collider. Cavity fabrication facility (CFF) in KEK is approaching this issue from a point of view of materials for cavities. CFF had fabricated SRF elliptical cavities made by two types of niobium; one is high tantalum contained and low RRR (< 100) fine grain niobium, and the other is high tantalum contained and RRR < 300 large grain (LG) niobium. Former was melted two times (normally five times) which results RRR recovery up to around 300, and used for cell parts. Two 3-cell cavities were fabricated for each material respectively and vertical tested. One of these cavity made by LG achieved accelerator gradients of more than 40 MV/m. In this report, cavity materials and vertical test results are presented in detail.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 676
EP  - 678
KW  - cavity
KW  - niobium
KW  - superconducting-RF
KW  - linear-collider
KW  - collider
DA  - 2019/01
PY  - 2019
SN  - 2226-0366
SN  - 978-3-95450-194-6
DO  - DOI: 10.18429/JACoW-LINAC2018-THPO002
UR  - http://jacow.org/linac2018/papers/thpo002.pdf
ER  -