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RIS citation export for TUMPA06: RF Heat Load Compensation for the European XFEL

TY - CONF
AU - Clausen, M.R.
AU - Boeckmann, T.
AU - Branlard, J.
AU - Eschke, J.
AU - Korth, O.
AU - Penning, J.
AU - Schoeneburg, B.
ED - Schaa, Volker RW
TI - RF Heat Load Compensation for the European XFEL
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 European XFEL is a 3.4km long X-ray Free Electron Laser. The accelerating structure consists of 96 cryo modules running at 1.3 GHz with 10 Hz repetition rate. The injector adds two modules running at 1.3 and 3.9 GHz respectively. The cryo modules are operated at 2 Kelvin. Cold compressors (CCs) pump down the liquid Helium to 30 mbar which corresponds to 2 Kelvin. Stable conditions in the cryogenic system are mandatory for successful accelerator operations. Pressure fluctuations at 2 K may cause detuning of cavities and could result in unstable CC operations. The RF losses in the cavities may be compensated by reducing the heater power in the liquid Helium baths of the nine cryogenic strings. This requires a stable readout of the current RF settings. The detailed signals are read out from several severs in the accelerator control system and then computed in the cryogenic control system for heater compensation. This paper will describe the commissioning of the cryogenic control system, the communication between the control systems involved and first results of machine operations with the heat loss compensation in place.
PB - JACoW
CP - Geneva, Switzerland
SP - 348
EP - 351
KW - ion
KW - operation
KW - controls
KW - cavity
KW - FEL
DA - 2018/01
PY - 2018
SN - 978-3-95450-193-9
DO - 10.18429/JACoW-ICALEPCS2017-TUMPA06
UR - http://jacow.org/icalepcs2017/papers/tumpa06.pdf
ER -