Paper | Title | Other Keywords | Page |
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MOPPC014 |
Diagnostic Use Case Examples for ITER Plant Instrumentation and Control | interface, controls, hardware, operation | 85 |
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ITER requires extensive diagnostics to meet the requirements for machine operation, protection, plasma control and physics studies. The realization of these systems is a major challenge not only because of the harsh environment and the nuclear requirements but also with respect to plant system Instrumentation and Control (I&C) of all the 45 diagnostics systems since the procurement arrangements of the ITER diagnostics with the domestic agencies require a large number of high performance fast controllers whose choice is based on guidelines and catalogues published by the ITER Organization (IO). The goal is to simplify acceptance testing and commissioning for both domestic agencies and the IO. For this purpose several diagnostic use case examples for plant system I&C documentation and implementation are provided by IO to the domestic agencies. Their implementations cover major parts of the diagnostic plant system I&C such as multi-channel high performance data and image acquisition, data processing as well as real-time and data archiving aspects. In this paper, the current status and achievements in implementation and documentation for the use case examples are presented. | |||
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Poster MOPPC014 [2.068 MB] | ||
MOPPC042 | Machine Protection System for the SPIRAL2 Facility | controls, target, beam-losses, PLC | 178 |
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The phase 1 of the SPIRAL2 facility, the extension project of the GANIL laboratory, is under construction in Caen, France. The accelerator is based on a linear solution, mainly composed of a normal conducting RFQ and a superconducting linac. One of its specificities is to be designed to accelerate high power deuteron and heavy ion beams from 40 to 200kW, and medium intensity heavy ion beams as well to a few kW. A Machine Protection System, has been studied to control and protect the accelerator from thermal damages for a very large range of beam intensities and powers. This paper presents the technical solutions chosen for this system which is based on two technical subsystems: one dedicated to thermal protection which requires a first PLC associated with a fast electronic system and a second dedicated to enlarged protection which is based on a safety products. | |||
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Poster MOPPC042 [2.220 MB] | ||
MOPPC066 | Reliability Analysis of the LHC Beam Dumping System Taking into Account the Operational Experience during LHC Run 1 | dumping, operation, controls, power-supply | 250 |
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The LHC beam dumping system operated reliably during the Run 1 period of the LHC (2009 – 2013). As expected, there were a number of internal failures of the beam dumping system which, because of in-built safety features, resulted in safe removal of the particle beams from the machine. These failures (i.e. "false" beam dumps) have been appointed to the different failure modes and are compared to the predictions made by a reliability model established before the start of LHC operation. A statistically significant difference between model and failure data identifies those beam dumping system components that may have unduly impacted on the LHC availability and safety or might have been out of the scope of the initial model. An updated model of the beam dumping system reliability is presented, taking into account the experimental data presented and the foreseen system changes to be made in the 2013 – 2014 LHC shutdown. | |||
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Poster MOPPC066 [1.554 MB] | ||
MOPPC087 | Tools and Rules to Encourage Quality for C/C++ Software | software, monitoring, framework, controls | 303 |
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Inspired by the success of the software improvement process for Java projects, in place since several years in the CERN accelerator controls group, it was agreed in 2011 to apply the same principles to the C/C++ software developed in the group, an initiative we call the Software Improvement Process for C/C++ software (SIP4C/C++). The objectives of the SIP4C/C++ initiative are: 1) agree on and establish best software quality practices, 2) choose tools for quality and 3) integrate these tools in the build process. After a year we have reached a number of concrete results, thanks to the collaboration between several involved projects, including: common build tool (based on GNU Make), which standardizes the way to build, test and release C/C++ binaries; unit testing with Google Test & Google Mock; continuous integration of C/C++ products with the existing CI server (Atlassian Bamboo); static code analysis (Coverity); generation of manifest file with dependency information; and runtime in-process metrics. This work presents the SIP4C/C++ initiative in more detail, summarizing our experience and the future plans. | |||
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Poster MOPPC087 [3.062 MB] | ||
TUCOAAB01 | Status of the National Ignition Facility (NIF) Integrated Computer Control and Information Systems | controls, laser, software, target | 483 |
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Funding: This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. #LLNL-ABS-631632 The National Ignition Facility (NIF) is operated by the Integrated Computer Control System in an object-oriented, CORBA-based system distributed among over 1800 front-end processors, embedded controllers and supervisory servers. At present, NIF operates 24x7 and conducts a variety of fusion, high energy density and basic science experiments. During the past year, the control system was expanded to include a variety of new diagnostic systems, and programmable laser beam shaping and parallel shot automation for more efficient shot operations. The system is also currently being expanded with an Advanced Radiographic Capability, which will provide short (<10 picoseconds) ultra-high power (>1 Petawatt) laser pulses that will be used for a variety of diagnostic and experimental capabilities. Additional tools have been developed to support experimental planning, experimental setup, facility configuration and post shot analysis, using open-source software, commercial workflow tools, database and messaging technologies. This talk discusses the current status of the control and information systems to support a wide variety of experiments being conducted on NIF including ignition experiments. |
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Slides TUCOAAB01 [4.087 MB] | ||
TUPPC024 | Challenges to Providing a Successful Central Configuration Service to Support CERN’s New Controls Diagnostics and Monitoring System | controls, database, monitoring, framework | 596 |
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The Controls Diagnostic and Monitoring service (DIAMON) provides monitoring and diagnostics tools to the operators in the CERN Control Centre. A recent reengineering presented the opportunity to restructure its data management and to integrate it with the central Controls Configuration Service (CCS). The CCS provides the Configuration Management for the Controls System for all accelerators at CERN. The new facility had to cater for the configuration management of all agents monitored by DIAMON, (>3000 computers of different types), provide deployment information, relations between metrics, and historical information. In addition, it had to be integrated into the operational CCS, while ensuring stability and data coherency. An important design decision was to largely reuse the existing infrastructure in the CCS and adapt the DIAMON data management to it e.g. by using the device/property model through a Virtual Devices framework to model the DIAMON agents. This article will show how these challenging requirements were successfully met, the problems encountered and their resolution. The new service architecture will be presented: database model, new and tailored processes and tools. | |||
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Poster TUPPC024 [2.741 MB] | ||
TUPPC039 | Development of a High-speed Diagnostics Package for the 0.2 J, 20 fs, 1 kHz Repetition Rate Laser at ELI Beamlines | laser, FPGA, controls, interface | 646 |
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The ELI Beamlines facility aims to provide a selection of high repetition rate terawatt and petawatt femtosecond pulsed lasers, with applications in plasma research, particle acceleration, high-field physics and high intensity extended-UV/X-ray generation. The highest rate laser in the facility will be a 1 kHz femtosecond laser with pulse energy of 200 mJ. This high repetition rate presents unique challenges for the control system, particularly the diagnostics package. This is tasked with measuring key laser parameters such as pulse energy, pointing accuracy, and beam profile. Not only must this system be capable of relaying individual pulse measurements in real-time to the six experimental target chambers, it must also respond with microsecond latency to any aberrations indicating component damage or failure. We discuss the development and testing of a prototype near-field camera profiling system forming part of this diagnostics package consisting of a 1000 fps high resolution camera and FPGA-based beam profile and aberration detection system. | |||
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Poster TUPPC039 [2.244 MB] | ||
TUPPC050 | Control, Safety and Diagnostics for Future ATLAS Pixel Detectors | detector, controls, monitoring, operation | 679 |
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To ensure the excellent performance of the ATLAS Pixel detector during the next run periods of the LHC, with increasing demands, two upgrades of the pixel detector are foreseen. One takes place in the first long shutdown, which is currently on-going. During this period an additional layer, the Insertable B-Layer, will be installed. The second upgrade will replace the entire pixel detector and is planed for 2020, when the LHC will be upgraded to HL-LHC. As once installed no access is possible over years, a highly reliable control system is required. It has to supply the detector with all entities required for operation, protect it at all times, and provide detailed information to diagnose the detector’s behaviour. Design constraints are the sensitivity of the sensors and reduction of material inside the tracker volume. We report on the construction of the control system for the Insertable B Layer and present a concept for the control of the pixel detector at the HL-LHC. While the latter requires completely new strategies, the control system of the IBL includes single new components, which can be developed further for the long-term upgrade. | |||
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Poster TUPPC050 [0.566 MB] | ||
TUPPC057 | New Development of EPICS-based Data Acquisition System for Electron Cyclotron Emission Diagnostics in KSTAR Tokamak | controls, electron, EPICS, real-time | 699 |
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Korea Superconducting Tokamak Advanced Research (KSTAR) will be operated in the 6nd campaign in 2013 after achievement of first plasma in 2008. Many diagnostic devices have been installed for measuring the various plasma properties in the KSTAR tokamak during the campaigns. From the first campaign, a data acquisition system of Electron Cyclotron Emission (ECE) Heterodyne Radiometer (HR) has been operated to measure the radial profile of electron temperature. The DAQ system at the beginning was developed with a VME-form factor digitizer in Linux OS platform. However, this configuration had some limitations that it could not acquire over 100,000 samples per second due to its unstable operation during the campaigns. In order to overcome these weak points, a new ECE HR DAQ system is under development with a cPCI-form factor in Linux OS platform and the main control application will be developed based on EPICS framework like other control systems installed in KSTAR. Besides solving the described problems main advantages of the new ECE HR DAQ system are capabilities of calculating plasma electron temperature during plasma shot and displaying it in run-time. | |||
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Poster TUPPC057 [1.286 MB] | ||
TUPPC072 | Flexible Data Driven Experimental Data Analysis at the National Ignition Facility | data-analysis, software, target, framework | 747 |
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Funding: This work was performed under the auspices of the Lawrence Livermore National Security, LLC, (LLNS) under Contract No. DE-AC52-07NA27344. #LLNL-ABS-632532 After each target shot at the National Ignition Facility (NIF), scientists require data analysis within 30 minutes from ~50 diagnostic instrument systems. To meet this goal, NIF engineers created the Shot Data Analysis (SDA) Engine based on the Oracle Business Process Execution Language (BPEL) platform. While this provided for a very powerful and flexible analysis product, it still required engineers conversant in software development practices in order to create the configurations executed by the SDA engine. As more and more diagnostics were developed and the demand for analysis increased, the development staff was not able to keep pace. To solve this problem, the Data Systems team took the approach of creating a database table based scripting language that allows users to define an analysis configuration of inputs, input the data into standard processing algorithms and then store the outputs in a database. The creation of the Data Driven Engine (DDE) has substantially decreased the development time for new analysis and simplified maintenance of existing configurations. The architecture and functionality of the Data Driven Engine will be presented along with examples. |
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Poster TUPPC072 [1.150 MB] | ||
TUPPC073 | National Ignition Facility (NIF) Dilation X-ray Imager (DIXI) Diagnostic Instrumentation and Control System | target, timing, controls, instrumentation | 751 |
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Funding: * This work was performed under the auspices of the Lawrence Livermore National Security, LLC, (LLNS) under Contract No. DE-AC52-07NA27344. #LLNL-ABS-633832 X-ray cameras on inertial confinement fusion facilities can determine the implosion velocity and symmetry of NIF targets by recording the emission of X-rays from the target gated as a function of time. To capture targets that undergo ignition and thermonuclear burn, however, cameras with less than 10 picosecond shutter times are needed. A Collaboration between LLNL, General Atomics and Kentech Instruments has resulted in the design and construction of an X-ray camera which converts an X-ray image to an electron image, which is stretched, and then coupled to a conventional shuttered electron camera to meet this criteria. This talk discusses target diagnostic instrumentation and software used to control the DIXI diagnostic and seamlessly integrate it into the National Ignition Facility (NIF) Integrated Computer Control System (ICCS). |
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Poster TUPPC073 [3.443 MB] | ||
TUPPC115 | Hierarchies of Alarms for Large Distributed Systems | controls, detector, experiment, interface | 844 |
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The control systems of most of the infrastructure at CERN makes use of the SCADA package WinCC OA by ETM, including successful projects to control large scale systems (i.e. the LHC accelerator and associated experiments). Each of these systems features up to 150 supervisory computers and several millions of parameters. To handle such large systems, the control topologies are designed in a hierarchical way (i.e. sensor, module, detector, experiment) with the main goal of supervising a complete installation with a single person from a central user interface. One of the key features to achieve this is alarm management (generation, handling, storage, reporting). Although most critical systems include automatic reactions to faults, alarms are fundamental for intervention and diagnostics. Since one installation can have up to 250k alarms defined, a major failure may create an avalanche of alarms that is difficult for an operator to interpret. Missing important alarms may lead to downtime or to danger for the equipment. The paper presents the developments made in recent years on WinCC OA to work with large hierarchies of alarms and to present summarized information to the operators. | |||
TUPPC126 | Visualization of Experimental Data at the National Ignition Facility | software, target, framework, database | 879 |
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Funding: * This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. #LLNL-ABS-633252 An experiment on the National Ignition Facility (NIF) may produce hundreds of gigabytes of target diagnostic data. Raw and analyzed data are accumulated into the NIF Archive database. The Shot Data Systems team provides alternatives for accessing data including a web-based data visualization tool, a virtual file system for programmatic data access, a macro language for data integration, and a Wiki to support collaboration. The data visualization application in particular adapts dashboard user-interface design patterns popularized by the business intelligence software community. The dashboard canvas provides the ability to rapidly assemble tailored views of data directly from the NIF archive. This design has proven capable of satisfying most new visualization requirements in near real-time. The separate file system and macro feature-set support direct data access from a scientist’s computer using scientific languages such as IDL, Matlab and Mathematica. Underlying all these capabilities is a shared set of web services that provide APIs and transformation routines to the NIF Archive. The overall software architecture will be presented with an emphasis on data visualization. |
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Poster TUPPC126 [4.900 MB] | ||
TUCOCA07 | A Streamlined Architecture of LCLS-II Beam Containment System | PLC, radiation, distributed, controls | 930 |
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With the construction of LCLS-II, SLAC is developing a new Beam Containment System (BCS) to replace the aging hardwired system. This system will ensure that the beam is confined to the design channel at an approved beam power to prevent unacceptable radiation levels in occupable areas. Unlike other safety systems deployed at SLAC, the new BCS is distributed and has explicit response time requirements, which impose design constraints on system architecture. The design process complies with IEC 61508 and the system will have systematic capability SC3. This paper discusses the BCS built on Siemens S7-300F PLC. For those events requiring faster action, a hardwired shutoff path is provided in addition to peer safety functions within PLC; safety performance is enhanced, and the additional diagnostic capabilities significantly relieve operational cost and burden. The new system is also more scalable and flexible, featuring improved configuration control, simplified EPICS interface and reduced safety assurance testing efforts. The new architecture fully leverages the safety PLC capabilities and streamlines design and commissioning through a single-processor single-programmer approach. | |||
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Slides TUCOCA07 [1.802 MB] | ||
TUCOCB02 | Middleware Proxy: A Request-Driven Messaging Broker for High Volume Data Distribution | controls, device-server, operation, database | 948 |
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Nowadays, all major infrastructures and data centers (commercial and scientific) make an extensive use of the publish-subscribe messaging paradigm, which helps to decouple the message sender (publisher) from the message receiver (consumer). This paradigm is also heavily used in the CERN Accelerator Control system, in Proxy broker - critical part of the Controls Middleware (CMW) project. Proxy provides the aforementioned publish-subscribe facility and also supports execution of synchronous read and write operations. Moreover, it enables service scalability and dramatically reduces the network resources and overhead (CPU and memory) on publisher machine, required to serve all subscriptions. Proxy was developed in modern C++, using state of the art programming techniques (e.g. Boost) and following recommended software patterns for achieving low-latency and high concurrency. The outstanding performance of the Proxy infrastructure was confirmed during the last 3 years by delivering the high volume of LHC equipment data to many critical systems. This work describes in detail the Proxy architecture together with the lessons learnt from operation and the plans for the future evolution. | |||
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Slides TUCOCB02 [4.726 MB] | ||
WECOBA05 | Understanding NIF Experimental Results: NIF Target Diagnostic Automated Analysis Recent Accompolishments | target, database, laser, software | 1008 |
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Funding: This work was performed under the auspices of the Lawrence Livermore National Security, LLC, (LLNS) under Contract No. DE-AC52-07NA27344. #LLNL-ABS-632818 The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is the most energetic laser system in the world. During a NIF laser shot, a 20-ns ultraviolet laser pulse is split into 192 separate beams, amplified, and directed to a millimeter-sized target at the center of a 10-m target chamber. To achieve the goals of studying energy science, basic science, and national security, NIF laser shot performance is being optimized around key metrics such as implosion shape and fuel mix. These metrics are accurately quantified after each laser shot using automated signal and image processing routines to analyze raw data from over 50 specialized diagnostics that measure x-ray, optical and nuclear phenomena. Each diagnostic’s analysis is comprised of a series of inverse problems, timing analysis, and specialized processing. This talk will review the framework for general diagnostic analysis, give examples of specific algorithms used, and review the diagnostic analysis team’s recent accomplishments. The automated diagnostic analysis for x-ray, optical, and nuclear diagnostics provides accurate key performance metrics and enables NIF to achieve its goals. |
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Slides WECOBA05 [3.991 MB] | ||
WECOCB02 | ARM Based Embedded EPICS Controller for Beam Diagnostics of Cyclotrons at VECC | EPICS, beam-diagnostic, hardware, embedded | 1024 |
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ARM based controller with embedded EPICS has been developed for beam diagnostics purpose in K-130 Room Temperature Cyclotron and K-500 Superconducting Cyclotron at Variable Energy Cyclotron Center. The beam diagnostics system in these cyclotrons consists of many hardware devices to be controlled and monitored. Presently, these hardware modules are interfaced with PC based systems using serial communication line. The ARM based embedded controller card is developed to replace the existing PC based systems with a small plug-in module that will contain the EPICS IOC and the database having the control parameters. This will have an obvious advantage of integrating the control system inside the hardware itself thus reducing the overall hardware complexities which was involved in the PC based systems. The paper explains the steps involved in designing the ARM based controller for beam diagnostics and Graphical User Interface (GUI) for Operator Interface. EPICS Channel Access embedded ActiveX components along with Microsoft Visual Basic (VB) is chosen as the OPI development platform. | |||
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Slides WECOCB02 [1.428 MB] | ||
THCOAAB07 | NIF Electronic Operations: Improving Productivity with iPad Application Development | operation, framework, network, database | 1066 |
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Funding: This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. #LLNL-ABS-632815 In an experimental facility like the National Ignition Facility (NIF), thousands of devices must be maintained during day to day operations. Teams within NIF have documented hundreds of procedures, or checklists, detailing how to perform this maintenance. These checklists have been paper based, until now. NIF Electronic Operations (NEO) is a new web and iPad application for managing and executing checklists. NEO increases efficiency of operations by reducing the overhead associated with paper based checklists, and provides analysis and integration opportunities that were previously not possible. NEO’s data driven architecture allows users to manage their own checklists and provides checklist versioning, real-time input validation, detailed step timing analysis, and integration with external task tracking and content management systems. Built with mobility in mind, NEO runs on an iPad and works without the need for a network connection. When executing a checklist, users capture various readings, photos, measurements and notes which are then reviewed and assessed after its completion. NEO’s design, architecture, iPad application and uses throughout the NIF will be discussed. |
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Slides THCOAAB07 [1.237 MB] | ||
THPPC014 | CMX - A Generic Solution to Expose Monitoring Metrics in C and C++ Applications | monitoring, controls, real-time, operation | 1118 |
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CERN’s Accelerator Control System is built upon a large number of C, C++ and Java services that are required for daily operation of the accelerator complex. The knowledge of the internal state of these processes is essential for problem diagnostic as well as for constant monitoring for pre-failure recognition. The CMX library follows similar principles as JMX (Java Management Extensions) and provides similar monitoring capabilities for C and C++ applications. It allows registering and exposing runtime information as simple counters, floating point numbers or character data. This can be subsequently used by external diagnostics tools for checking thresholds, sending alerts or trending. CMX uses shared-memory to ensure non-blocking read/update actions, which is an important requirement for real-time processes. This paper introduces the topic of monitoring C/C++ applications and presents CMX as a building block to achieve this goal. | |||
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Poster THPPC014 [0.795 MB] | ||
THPPC026 | Diagnostic Controls of IFMIF-EVEDA Prototype Accelerator | controls, EPICS, software, emittance | 1144 |
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The Linear IFMIF prototype accelerator (LIPac) will accelerate a 9 MeV, 125 mA, CW deuteron beam in order to validate the technology that will be used for the future IFMIF accelerator (International Fusion Materials Irradiation Facility). This facility will be installed in Rokkasho (Japan) and Irfu-Saclay has developed the control system for several work packages like the injector and a set of the diagnostic subsystem. At Irfu-Saclay, beam tests were carried out on the injector with its diagnostics. Diagnostic devices have been developed to characterize the high beam power (more than 1MW) along the accelerator: an Emittance Meter Unit (EMU), Ionization Profile Monitors (IPM), Secondary Electron Emission Grids (SEM-grids), Beam Loss Monitors (BLoM and μLoss), and Current Transformers (CT). This control system relies on COTS and an EPICS software platform. A specific isolated fast acquisition subsystem running at high sampling rate (about 1 MS/s), triggered by the Machine Protection System (MPS), is dedicated to the analysis of post-mortem data produced by the BLoMs and current transformer signals. | |||
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Poster THPPC026 [0.581 MB] | ||
THPPC048 | Upgrade of the Nuclotron Injection Control and Diagnostics System | controls, injection, TANGO, device-server | 1176 |
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Nuclotron is a 6 GeV/n superconducting synchrotron operating at JINR, Dubna since 1993. It will be the core of the future accelerating complex NICA which is under development now. The report presents details of the Nuclotron injection hardware and software upgrade to operate under future NICA control system based on Tango. The designed system provides control and synchronization of electrostatic and magnetic inflector devices and diagnostics of the ion beam injected from 20MeV linear accelerator to Nuclotron. The hardware consists of few controllable power supplies, various National Instruments acquisition devices, custom-designed controller module. The software consists of few C++ Tango device servers and NI LabView client applications. | |||
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Poster THPPC048 [1.472 MB] | ||
THPPC071 | Machine Protection Diagnostics on a Rule Based System | DSL, hardware, vacuum, software | 1235 |
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Since commissioning the high-brilliance, 3rd-generation light source, PETRA-3 in 2009 the accelerator operation has become routine. To guard the machine against damage a Machine Protection System (MPS) was built [*]. Alarms and beam information are collected by the MPS and can be used to analyse beam losses and dumps. The MPS triggers a visual diagnostic software, which is used to analyse the hardware dump cause. The diagnostic software is based on a Domain Specific Language (DSL) architecture. The MPS diagnostic application is designed with a server-client architecture and written in Java. The communication protocol is based on TINE. We characterise the data flow of the alarms and the DSL specification and describe the composition from the delivered structure to a single, human understandable message.
* T. Lensch, M. Werner, "Commissioning Results and Improvements of the Machine Protection System for PETRA III", BIW10, New Mexico, US, 2010 |
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Poster THPPC071 [0.838 MB] | ||
THPPC085 | Image Analysis for the Automated Alignment of the Advanced Radiography Capability (ARC) Diagnostic Path* | alignment, controls, hardware, software | 1274 |
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Funding: *This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. #LLNL-ABS-631616 The Advanced Radiographic Capability (ARC) at the National Ignition Facility was developed to produce a sequence of short laser pulses that are used to backlight an imploding fuel capsule. This backlighting capability will enable the creation of a sequence of radiographs during capsule implosion and provide an unprecedented view into the dynamics of the implosion. A critical element of the ARC is the diagnostic instrumentation used to assess the quality of the pulses. Pulses are steered to the diagnostic package through a complex optical path that requires precision alignment. A central component of the alignment system is the image analysis algorithms, which are used to extract information from alignment imagery and provide feedback for the optical alignment control loops. Alignment imagery consists of complex patterns of light resulting from the diffraction of pilot beams around cross-hairs and other fiducials placed in the optical path. This paper describes the alignment imagery, and the image analysis algorithms used to extract the information needed for proper operation of the ARC automated alignment loops. |
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Poster THPPC085 [3.236 MB] | ||
THPPC090 | Picoseconds Timing System | timing, laser, experiment, controls | 1285 |
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The instrumentation of large physics experiments needs to be synchronized down to few picoseconds. These experiments require different sampling rates for multi shot or single shot on each instrument distributed on a large area. Greenfield Technology presents a commercial solution with a Picoseconds Timing System built around a central Master Oscillator which delivers a serial data stream over an optical network to synchronize local multi channel delay generators. This system is able to provide several hundreds of trigger pulses within a 1ps resolution and a jitter less than 15 ps distributed over an area up to 10 000 m². The various qualities of this Picoseconds Timing System are presented with measurements and functions and have already been implemented in French facilities (Laser MegaJoule prototype - Ligne d’Intégration Laser- , petawatt laser applications and synchrotron Soleil). This system with different local delay generator form factors (box, 19” rack, cPCI or PXI board) and many possibilities of trigger pulse shape is the ideal solution to synchronize Synchrotron, High Energy Laser or any Big Physics Experiments. | |||
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Poster THPPC090 [1.824 MB] | ||
THCOCA05 | Laser MegaJoule Timing System | laser, timing, target, high-voltage | 1457 |
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The French Commissariat à l’Énergie Atomique et aux Énergies alternatives (CEA) is currently building the Laser Megajoule (LMJ). This facility is designed to deliver laser energy to targets for high energy density physics experiments, including fusion experiments. The Integrated Timing and Triggering System (ITTS) is one of the critical LMJ components, in charge of timing distribution for synchronizing the laser beams and triggering the shot data acquisitions. The LMJ ITTS Control System provides a single generic interface to its users at the Supervisory level, built around the key concept of “Synchronized Channels Group”, a set of delay channels triggered simultaneously. Software common components provide basic mechanisms: communication with its users, channel registration User-defined delays are specified with respect to a given reference(target chamber center, quadruplet or beam reference times), these delays are then translated into hardware delays according to different parameters such as electronic cards temperatures(for thermal drift correction) and transit delays. Equipments are mainly off-the-shelf timing equipments delivering trigger signals with jitter down to 15ps rms. | |||
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Slides THCOCA05 [0.974 MB] | ||
FRCOAAB04 | Data Driven Campaign Management at the National Ignition Facility | experiment, target, interface, database | 1473 |
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Funding: * This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. #LLNL-ABS-633255 The Campaign Management Tool Suite (CMT) provides tools for establishing the experimental goals, achieving reviews and approvals, and ensuring readiness for a NIF experiment. Over the last 2 years, CMT has significantly increased the number of diagnostics that supports to around 50. Meeting this ever increasing demand for new functionality has resulted in a design whereby more and more of the functionality can be specified in data rather than coded directly in Java. To do this support tools have been written that manage various aspects of the data and to also handle potential inconsistencies that can arise from a data driven paradigm. For example; drop down menus are specified in the Part and Lists Manager, the Shot Setup reports that lists the configurations for diagnostics are specified in the database, the review tool Approval Manager has a rules engine that can be changed without a software deployment, various template managers are used to provide predefined entry of hundreds parameters and finally a stale data tool validates that experiments contain valid data items. The trade-offs, benefits and issues of adapting and implementing this data driven philosophy will be presented. |
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Slides FRCOAAB04 [0.929 MB] | ||