Kraus, I.

Liebermann, H.

Ondreka, D.

Reimann, S.

Schlei, B. R.

GSI Repository

Project status of the new setting generation system for GSI and FAIRD. Ondreka, I. Kraus, H. Liebermann, S. Reimann, and B. R. SchleiGSI, Darmstadt, GermanyThe progress made on the new setting generation systemfor FAIR and GSI regarding machine modeling and appli-cation development is reported. Developments of the LSAframework [1] are presented as part of the report on thedevelopment of the FAIR control system software [2].Machine modelingA major topic regarding machine modeling was the de-velopment of a generic model for longitudinal bunch ma-nipulations in synchrotrons such as bunch merging andbatch compression. These manipulations are implementedby operating the RF system at multiple harmonics, result-ing in complex patterns of variation for frequency, ampli-tude, and phase of the individual cavities. An algorithmwas implemented which allows the definition of any com-bination of merging and compression steps in any machine.As an example, the proton stacking and compressionscheme in SIS100 is described: The proton beam is ac-cumulated by filling 4 out of 10 buckets with 4 injectionsfrom SIS18. After that, a combination of merging and com-pression steps is applied to gather the complete beam in asingle bunch at harmonic number 5. The scheme uses twogroups of RF cavities. Fig. 1 shows the temporal evolutionof RF voltage and harmonic number h for one cavity ofeach group during this process.Figure 1: RF voltages for the creation of a single protonbunch in SIS100 at the injection level.Another important topic concerned the implementationof a machine model for CRYRING, which will be con-trolled by a prototype of the new FAIR control system.In 2013 data on the ring hardware, such as power supplyproperties and magnet calibration data, and the ion opti-cal layout, was imported into the LSA database and a hi-erarchy of relevant parameters created. Operational cycleswere defined and corresponding set values calculated for alldevices, starting from physics quantities like beam energy.Fig. 2 displays the current in the main bending mag-nets for the acceleration of a proton beam from 300 keVto 30 MeV. In the second half the current is set back to theinjection level again.Figure 2: Control system application displaying the currentin the main magnets for a CRYRING cycle.ApplicationsThe development of the Java version of MIRKO wascontinued. On the one hand, the functionality for its useas an online steering tool was implemented. On the otherhand, significant effort was put into the further integrationinto the LSA development and build environment.Another important activity concerned the adaptation ofthe application YASP from CERN for closed orbit correc-tion in rings to the FAIR control system. This applicationis intended to become a standard tool in FAIR. This workwill be continued in the coming year.References[1] G. Kruk et al., “LHC Software Architecture LSA – EvolutionToward LHC Beam Commissioning”, ICALEPCS’07.[2] J. Fitzek et al., “Status of the software development for theFAIR accelerator control system”, this report.FG-CS-06 GSI SCIENTIFIC REPORT 2013376 doi:10.15120/GR-2014-1-FG-CS-06

Project status of the new setting generation system for GSI and FAIR

http://repository.gsi.de/record/68060/files/FG-CS-06.pdf

Project status of the new setting generation system for GSI and FAIR

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