Design and Implementation of the LLRF System for LCLS-II

Serrano, Carlos; Babel, Sandeep; Bachimanchi, Ramakrishna; Benwell, Andrew; Boyes, Matt; Brown, Garth; Campbell, Kerri; Cha, David Nam Sul; Chase, Brian; Cullerton, Ed; De Long, Joseph; Diaz Cruz, Jorge; Doolittle, Lawrence; Du, Qiang; Einstein, Joshua; Greg, Dalit; Holzbauer, Jeremiah; Hong, Bo; Hovater, Curt; Huang, Gang; Jones, John; Kelly, Richard; Klepec, Daniel; McCollough, Andre; Petree, Mark; Pischalnikov, Yuriy; Ratti, Alessandro; Rivetta, Claudio; Schappert, Warren; Seidman, David; Vytla, Vamsi

doi:10.18429/JACoW-ICALEPCS2017-THSH202

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RIS citation export for THSH202: Design and Implementation of the LLRF System for LCLS-II

TY - CONF
AU - Serrano, C.
AU - Babel, S.
AU - Bachimanchi, R.
AU - Benwell, A.L.
AU - Boyes, M.
AU - Brown, G.W.
AU - Campbell, K.S.
AU - Cha, D.
AU - Chase, B.E.
AU - Cullerton, E.
AU - De Long, J.H.
AU - Diaz Cruz, J.A.
AU - Doolittle, L.R.
AU - Du, Q.
AU - Einstein, J.
AU - Greg, D.B.
AU - Holzbauer, J.P.
AU - Hong, B.
AU - Hovater, C.
AU - Huang, G.
AU - Jones, J.A.
AU - Kelly, R.S.
AU - Klepec, D.W.
AU - McCollough, A.L.
AU - Petree, M.
AU - Pischalnikov, Y.M.
AU - Ratti, A.
AU - Rivetta, C.H.
AU - Schappert, W.
AU - Seidman, D.J.
AU - Vytla, V.K.
ED - Schaa, Volker RW
ED - Costa, Isidre
ED - FernÃ¡ndez, David
ED - Matilla, Ãscar
TI - Design and Implementation of the LLRF System for LCLS-II
J2 - Proc. of ICALEPCS2017, Barcelona, Spain, 8-13 October 2017
C1 - Barcelona, Spain
T2 - International Conference on Accelerator and Large Experimental Control Systems
T3 - 16
LA - english
AB - The SLAC National Accelerator Laboratory is building LCLS-II, a new 4 GeV CW superconducting (SCRF) linac as a major upgrade of the existing LCLS. The SCRF linac consists of 35 ILC style cryomodules (eight cavities each) for a total of 280 cavities. Expected cavity gradients are 16 MV/m with a loaded QL of ~ 4 x 10⁷. Each individual RF cavity will be powered by one 3.8 kW solid state amplifier. To ensure optimum field stability a single source single cavity control system has been chosen. It consists of a precision four channel cavity receiver and two RF stations (Forward, Reflected and Drive signals) each controlling two cavities. In order to regulate the resonant frequency variations of the cavities due to He pressure, the tuning of each cavity is controlled by a Piezo actuator and a slow stepper motor. In addition the system (LLRF-amplifier-cavity) was modeled and cavity microphonic testing has started. This paper will describe the main system elements as well as test results on LCLS-II cryomodules.
PB - JACoW
CP - Geneva, Switzerland
SP - 1969
EP - 1974
KW - ion
KW - cavity
KW - controls
KW - LLRF
KW - cryomodule
DA - 2018/01
PY - 2018
SN - 978-3-95450-193-9
DO - 10.18429/JACoW-ICALEPCS2017-THSH202
UR - http://jacow.org/icalepcs2017/papers/thsh202.pdf
ER -