Operation of LLRF Control Systems in SuperKEKB Phase-1 Commissioning

Kobayashi, Tetsuya; Akai, Kazunori; Ebihara, Kiyokazu; Hirosawa, Kouki; Kabe, Atsushi; Nakanishi, Kota; Nishiwaki, Michiru; Odagiri, Jun-Ichi; Yoshimoto, Shin-ichi

doi:10.18429/JACoW-IPAC2017-THPAB114

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RIS citation export for THPAB114: Operation of LLRF Control Systems in SuperKEKB Phase-1 Commissioning

TY - CONF
AU - Kobayashi, T.
AU - Akai, K.
AU - Ebihara, K.
AU - Hirosawa, K.
AU - Kabe, A.
AU - Nakanishi, K.
AU - Nishiwaki, M.
AU - Odagiri, J.-I.
AU - Yoshimoto, S.I.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - Operation of LLRF Control Systems in SuperKEKB Phase-1 Commissioning
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - First beam commissioning of SuperKEKB (Phase-1), which had started in February 2016 and continued until the end of June, has been successfully accomplished. Target beam current for Phase-1 needed for sufficient vacuum scrubbing was achieved in both 7-GeV electron and 4-GeV positron rings. This presentation summarize the operation results related to low level RF (LLRF) control issues during the Phase-1 commissioning, including the system tuning, the coupled bunch instability and the bunch gap transient effect. RF system of SuperKEKB consists of about thirty klystron stations in both rings. Newly developed LLRF control system, which is composed of recent digital technique, is applied to the nine stations among the thirty for Phase-1. The RF reference signal distribution system has been also upgraded for SuperKEKB. These new systems worked well without serious problem and they contributed to smooth progress of the commissioning. The old existing systems, which had been used in the KEKB operation, were still reused for the most stations, and they also worked as soundly as performed in the KEKB operation.
PB - JACoW
CP - Geneva, Switzerland
SP - 3986
EP - 3988
KW - controls
KW - LLRF
KW - cavity
KW - simulation
KW - operation
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-THPAB114
UR - http://jacow.org/ipac2017/papers/thpab114.pdf
ER -