Contribution to a conference proceedings

PUBDB-2017-12183

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png RF Heat Load Compensation for the European XFEL

Clausen, M. (Corresponding author)DESY* ; Boeckmann, T.DESY* ; Branlard, J.DESY* ; Eschke, J.DESY* ; Korth, O.DESY* ; Penning, J.DESY* ; Schoeneburg, B.DESY*

2017

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Please use a persistent id in citations: doi:10.3204/PUBDB-2017-12183

Abstract: The European XFEL is a 3.4km long X-ray Free Elec-tron 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 Helium vapour 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 on the cryogenic control system, the communication between the control systems involved and first results of machine operations with the heat loss compensation in place.

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Contributing Institute(s):

1. Kryokontrollen (MKS2)
2. Strahlkontrollen (MSK)
3. Kryogenik (MKS1)

Research Program(s):

1. 6G13 - XFEL (POF3-622) (POF3-622)

Experiment(s):

1. Facility (machine) XFEL

Appears in the scientific report 2017

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Poster Clausen, M. (Corresponding author)DESY* ; Boeckmann, T. (Contributor)DESY* ; Branlard, J. (Contributor)DESY* ; Eschke, J. (Contributor)DESY* ; Korth, O. (Contributor)DESY* ; Penning, J. (Contributor)DESY* ; Schoeneburg, B. (Contributor)DESY*
RF Heat Load Compensation for the European XFEL
201716th International Conference on Accelerator and Large Experimental Physics Control Systems, ICALEPCS2017, DESYBarcelona, DESY, Spain, 8 Oct 2017 - 13 Oct 20172017-10-082017-10-13 [10.3204/PUBDB-2017-12070]     Files BibTeX | EndNote: XML, Text | RIS

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