TY  - CONF
AU  - Du, B.
AU  - Liu, N.
AU  - Matsumoto, T.
AU  - Michizono, S.
AU  - Miura, T.
AU  - Qiu, F.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Design of a Compact Power Distribution System for the ILC
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - The Local power distribution system (LPDS) of the In-ternational Linear Collider (ILC) is constructed to transmit RF power from the 10 MW klystron to 39 cavi-ties. Each eight or nine 9-cell cavities is assembled in one cryomodule. The variable hybrid is used to adjust the power dividing ratio due to the different required power of each cavity and the variable phase shifter is used to compensate the phase drift caused by the variable hybrid. More compact LPDS is expected to be integrated on the cryomodule decreasing financial cost. We re-design the shorter variable hybrid with a margin of power ratio of ±25% and phase shifter of total phase range being 35° for compensating hybrid and on-crest searching. Fixed phase shifters are designed to adjust the phase difference between adjacent cavities for beam acceleration. Simu-lated results of total compact LPDS can meet the re-quirements of ILC.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 436
EP  - 438
KW  - cavity
KW  - cryomodule
KW  - ECR
KW  - acceleration
KW  - collider
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPMP007
UR  - http://jacow.org/ipac2019/papers/mopmp007.pdf
ER  - 

TY  - CONF
AU  - Liu, N.
AU  - Arakawa, D.A.
AU  - Du, B.
AU  - Katagiri, H.
AU  - Kobayashi, T.
AU  - Matsumoto, T.
AU  - Michizono, S.
AU  - Miura, T.
AU  - Qiu, F.
AU  - Yano, Y.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Development Status of RF Reference Phase Stabilization System for SuperKEKB Injector LINAC
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - SuperKEKB injector linear accelerator (LINAC) has 600 m beam lines which consist of 8 sectors. The 2856 MHz RF reference signals are distributed to each sector with long phase stabilized optical fiber (PSOF). The RF reference phase stability requirement is estimated to be 0.2°(RMS) corresponding to 200 fs. The prototype of RF reference phase stabilization system with single mode optical circulator was implemented and demonstrated in the laboratory. The returned phase drift is compensated by a piezo-driven fiber stretcher. The transmitted phase through 120 m PSOF is stabilized to 41 fs (pk-pk), which fulfilled the requirement. This paper introduces the RF reference phase stabilization system and reports the preliminary feedback result.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3879
EP  - 3881
KW  - linac
KW  - controls
KW  - feedback
KW  - photon
KW  - distributed
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPRB033
UR  - http://jacow.org/ipac2019/papers/thprb033.pdf
ER  -