Keyword: kicker
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WEPMS022 The Controller Design for Kicker Magnet Adjustment Mechanism in SSRF controls, software, feedback, injection 1021
  • R. Wang, R. Chen, Z.H. Chen, M. Gu
    SINAP, Shanghai, People's Republic of China
  The kicker magnet adjustment mechanism controller in SSRF is to improve the efficiency of injection by changing the magnet real-time, especially in the top-up mode. The controller mainly consists of Programmable Logic Controller (PLC), stepper motor, reducer, worm and mechanism. PLC controls the stepper motors for adjusting the azimuth of the magnet, monitors and regulates the magnet with inclinometer sensor. It also monitors the interlock. In addition, the controller is provided with local and remote working mode. This paper mainly introduces related hardware and software designs for this device.  
poster icon Poster WEPMS022 [0.173 MB]  
WEPMU011 Automatic Injection Quality Checks for the LHC injection, GUI, timing, software 1077
  • L.N. Drosdal, B. Goddard, R. Gorbonosov, S. Jackson, D. Jacquet, V. Kain, D. Khasbulatov, M. Misiowiec, J. Wenninger, C. Zamantzas
    CERN, Geneva, Switzerland
  Twelve injections per beam are required to fill the LHC with the nominal filling scheme. The injected beam needs to fulfill a number of requirements to provide useful physics for the experiments when they take data at collisions later on in the LHC cycle. These requirements are checked by a dedicated software system, called the LHC injection quality check. At each injection, this system receives data about beam characteristics from key equipment in the LHC and analyzes it online to determine the quality of the injected beam after each injection. If the quality is insufficient, the automatic injection process is stopped, and the operator has to take corrective measures. This paper will describe the software architecture of the LHC injection quality check and the interplay with other systems. A set of tools for self-monitoring of the injection quality checks to achieve optimum performance will be discussed as well. Results obtained during the LHC commissioning year 2010 and the LHC run 2011 will finally be presented.  
poster icon Poster WEPMU011 [0.358 MB]  
WEPMU023 External Post-Operational Checks for the LHC Beam Dumping System controls, operation, injection, extraction 1111
  • N. Magnin, V. Baggiolini, E. Carlier, B. Goddard, R. Gorbonosov, D. Khasbulatov, J.A. Uythoven, M. Zerlauth
    CERN, Geneva, Switzerland
  The LHC Beam Dumping System (LBDS) is a critical part of the LHC machine protection system. After every LHC beam dump action the various signals and transient data recordings of the beam dumping control systems and beam instrumentation measurements are automatically analysed by the eXternal Post-Operational Checks (XPOC) system to verify the correct execution of the dump action and the integrity of the related equipment. This software system complements the LHC machine protection hardware, and has to ascertain that the beam dumping system is ‘as good as new’ before the start of the next operational cycle. This is the only way by which the stringent reliability requirements can be met. The XPOC system has been developed within the framework of the LHC “Post-Mortem” system, allowing highly dependable data acquisition, data archiving, live analysis of acquired data and replay of previously recorded events. It is composed of various analysis modules, each one dedicated to the analysis of measurements coming from specific equipment. This paper describes the global architecture of the XPOC system and gives examples of the analyses performed by some of the most important analysis modules. It explains the integration of the XPOC into the LHC control infrastructure along with its integration into the decision chain to allow proceeding with beam operation. Finally, it discusses the operational experience with the XPOC system acquired during the first years of LHC operation, and illustrates examples of internal system faults or abnormal beam dump executions which it has detected.  
poster icon Poster WEPMU023 [1.768 MB]  
THCHMUST06 The FAIR Timing Master: A Discussion of Performance Requirements and Architectures for a High-precision Timing System timing, controls, FPGA, network 1256
  • M. Kreider
    GSI, Darmstadt, Germany
  • M. Kreider
    Hochschule Darmstadt, University of Applied Science, Darmstadt, Germany
  Production chains in a particle accelerator are complex structures with many interdependencies and multiple paths to consider. This ranges from system initialisation and synchronisation of numerous machines to interlock handling and appropriate contingency measures like beam dump scenarios. The FAIR facility will employ WhiteRabbit, a time based system which delivers an instruction and a corresponding execution time to a machine. In order to meet the deadlines in any given production chain, instructions need to be sent out ahead of time. For this purpose, code execution and message delivery times need to be known in advance. The FAIR Timing Master needs to be reliably capable of satisfying these timing requirements as well as being fault tolerant. Event sequences of recorded production chains indicate that low reaction times to internal and external events and fast, parallel execution are required. This suggests a slim architecture, especially devised for this purpose. Using the thread model of an OS or other high level programs on a generic CPU would be counterproductive when trying to achieve deterministic processing times. This paper deals with the analysis of said requirements as well as a comparison of known processor and virtual machine architectures and the possibilities of parallelisation in programmable hardware. In addition, existing proposals at GSI will be checked against these findings. The final goal will be to determine the best instruction set for modelling any given production chain and devising a suitable architecture to execute these models.  
slides icon Slides THCHMUST06 [2.757 MB]