Keyword: target
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MOAL02 Status of the National Ignition Facility (NIF) Integrated Computer Control and Information Systems controls, laser, diagnostics, experiment 9
 
  • M. Fedorov, A.I. Barnes, L. Beaulac, G.K. Brunton, A.D. Casey, J.R. Castro Morales, J. Dixon, C.M. Estes, M.S. Flegel, V.K. Gopalan, S. Heerey, R. Lacuata, V.J. Miller Kamm, M. Paul, B.M. Van Wonterghem, S. Weaver
    LLNL, Livermore, California, USA
 
  Funding: This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344
The National Ignition Facility (NIF) is the world’s most energetic laser system used for Inertial Confinement Fusion (ICF) and High Energy Density Physics (HEDP) experimentation. Each laser shot delivers up to 1.9 MJ of ultraviolet light, driving target temperatures to in excess of 180 million K and pressures 100 billion times atmospheric ’ making possible direct study of conditions mimicking interiors of stars and planets, as well as our primary scientific applications: stockpile stewardship and fusion power. NIF control and diagnostic systems allow physicists to precisely manipulate, measure and image this extremely dense and hot matter. A major focus in the past two years has been adding comprehensive new diagnostic instruments to evaluate increasing energy and power of the laser drive. When COVID-19 struck, the controls team leveraged remote access technology to provide efficient operational support without stress of on-site presence. NIF continued to mitigate inevitable technology obsolescence after 20 years since construction. In this talk, we will discuss successes and challenges, including NIF progress towards ignition, achieving record neutron yields in early 2021.
LLNL-ABS-821973
 
slides icon Slides MOAL02 [5.014 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-MOAL02  
About • Received ※ 10 October 2021       Accepted ※ 30 November 2021       Issue date ※ 24 February 2022  
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MOBR03 Hexapod Control System Development Towards Arbitrary Trajectories Scans at Sirius/LNLS controls, acceleration, software, experiment 84
 
  • A.Y. Horita, F.A. Del Nero, G.N. Kontogiorgos, M.A.L. Moraes
    LNLS, Campinas, Brazil
  • G.G. Silva
    UNICAMP, Campinas, São Paulo, Brazil
 
  Modern 4th generation synchroton facilities demand high precision and dynamic manipulation systems capable of fine position control, aiming to improve the resolution and perfomance of their experiments. In this context, hexapods are widely used to obtain a flexible and accurate 6 Degrees of Freedom (DoF) positioning system, as they are based on Parallel Kinematic Mechanisms (PKM). Aiming the customization and governability of this type of motion control system, a software application was entirely modeled and implemented at Sirius. A Bestec hexapod was used and the control logic was embedded into an Omron Delta Tau Power Brick towards the standardization of Sirius control solutions with features which completely fill the beamline scan needs, e.g. tracing arbitrary trajectories. Newton-Raphson numerical method was applied to implement the PKM. Besides, the kinematics was implemented in C language, targeting a better runtime performance when comparing to script languages. This paper describes the design and implementation methods used in this control application development and presents its resulting performance.  
slides icon Slides MOBR03 [3.545 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-MOBR03  
About • Received ※ 10 October 2021       Revised ※ 17 October 2021       Accepted ※ 20 November 2021       Issue date ※ 19 January 2022
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WEAL01 Image Processing Alignment Algorithms for the Optical Thomson Scattering Laser at the National Ignition Facility alignment, laser, optics, plasma 528
 
  • A.A.S. Awwal, T.S. Budge, R.R. Leach, R.R. Lowe-Webb, V.J. Miller Kamm, S. Patankar, B.P. Patel, K.C. Wilhelmsen
    LLNL, Livermore, California, USA
 
  Funding: *This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
Understanding plasma performance in the world’s largest and most energetic laser facility, the National Ignition Facility (NIF), is an important step to achieving the goal of inertial confinement fusion in a laboratory setting. The optical Thompson scattering (OTS) laser has been developed to understand the target implosion physics, especially for under-dense plasma conditions. A 5w probe beams can be set up for diagnosing various plasma densities. Just as the NIF laser with 192 laser beams are precisely aligned, the OTS system also requires precision alignment using a series of automated closed loop control steps. CCD images from the OTS laser (OTSL) beams are analyzed using a suite of image processing algorithm. The algorithms provide beam position measurements that are used to control motorized mirrors that steer beams to their defined desired location. In this paper, several alignment algorithms will be discussed with details on how they take advantage of various types of fiducials such as diffraction rings, contrasting squares and circles, octagons and very faint 5w laser beams.
*This is released as LLNL-ABS-821809
 
slides icon Slides WEAL01 [1.303 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-WEAL01  
About • Received ※ 08 October 2021       Revised ※ 18 October 2021       Accepted ※ 21 November 2021       Issue date ※ 14 March 2022
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WEBR05 Integrated Supervision for Conventional and Machine-Protection Configuration Parameters at ITER controls, operation, interface, GUI 602
 
  • D.A. Karkinsky, J. Jignesh, A. Marqueta, I. Prieto Diaz, W. Van Herck
    ITER Organization, St. Paul lez Durance, France
 
  Configuration parameters for ITER’s I&C systems are predominantly high-coupled due to the nature of the process under control. Subsequently, I&C re-configuration requires an integrated supervision approach that addresses coupling through abstraction, automation, scalability, changeability, robustness and re-usability. Moreover, high-coupling might manifest at any tier of the I&C, and certainly spans configuration parameters across both conventional and machine-protection I&C. Stemming from ITER design guidelines, the handling of machine-protection configuration parameters needs to meet the goals of IEC61508-3. These goals are mostly in congruence with the main concerns of integrated supervision identified above. However they also extend requirements that bind the supervision process with traceability and audit capabilities from sources to final self-test (run-time) diagnostics. This presentation describes the provisions for integrated supervision at ITER and elaborates how these provisions can be used to handle machine-protection parameters in compliance with IEC61508-3.  
slides icon Slides WEBR05 [0.510 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-WEBR05  
About • Received ※ 07 October 2021       Revised ※ 18 October 2021       Accepted ※ 21 December 2021       Issue date ※ 27 December 2021
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WEPV036 The LMJ Target Chamber Diagnostic Module vacuum, laser, experiment, Windows 734
 
  • R. Clot
    CEA, LE BARP cedex, France
 
  The Laser MegaJoule (LMJ), the French 176-beam laser facility, is located at the CEA CESTA Laboratory near Bordeaux (France). It is designed to deliver about 1.4 MJ of energy on targets, for high energy density physics experiments, including fusion experiments. The first bundle of 8-beams was commissioned in October 2014. By the end of 2021, ten bundles of 8-beams are expected to be fully operational. Due to energy levels achieved, optical components located at the end of the bundles are highly subject to damage stresses. This is particularly the case with vacuum windows whose integrity is critical. To measure these damages, identify the growth laws, and prevent their degradation (through blockers), the Target Chamber Diagnostic Module (TCDM) was integrated into the LMJ installation in 2019. This diagnostic, which also measures the windows transmission rate, as well as the spatial energy distribution at the end of the bundles, has been designed to operate automatically at night, between two experiments. This presentation describes this 2 years feedback of TCDM and presents the areas for improvement which have been identified to optimize its efficiency and reduce its timeline.  
slides icon Slides WEPV036 [2.047 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-WEPV036  
About • Received ※ 08 October 2021       Accepted ※ 05 January 2022       Issue date ※ 25 January 2022  
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WEPV044 Beam Profile Measurements as Part of the Safe and Efficient Operation of the New SPS Beam Dump System software, operation, status, MMI 764
 
  • A. Topaloudis, E. Bravin, S. Burger, S. Jackson, F.M. Velotti, E. Veyrunes
    CERN, Meyrin, Switzerland
 
  In the framework of the LHC Injectors Upgrade (LIU) project, the Super Proton Synchrotron (SPS) accelerator at CERN is undergoing a profound upgrade including a new high-energy beam dump. The new Target Internal Dump Vertical Graphite (TIDVG#5) is designed to withstand an average dumped beam power as high as 235 kW to cope with the increased intensity and brightness of the LIU beams whose energies in the SPS range from 14 to 450 GeV. Considering such highly demanding specifications, the constant monitoring of the device’s status and the characteristics of the beams that are dumped to it is of utmost importance to guarantee an efficient operation with little or no limitations. While the former is ensured with several internal temperature sensors, a Beam Observation system based on a scintillating screen and a digital camera is installed to extract the profile of the beam dumped in TIDVG#5 for post mortem analysis. This paper describes the overall system that uses the BTV images to contribute to the safe and efficient operation of the SPS Beam Dump System (SBDS) and hence the accelerator.  
poster icon Poster WEPV044 [0.723 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-WEPV044  
About • Received ※ 10 October 2021       Revised ※ 22 October 2021       Accepted ※ 22 December 2021       Issue date ※ 09 February 2022
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THAL02 Bayesian Techniques for Accelerator Characterization and Control experiment, controls, simulation, solenoid 791
 
  • R.J. Roussel, A.L. Edelen, C.E. Mayes
    SLAC, Menlo Park, California, USA
  • J.P. Gonzalez-Aguilera, Y.K. Kim
    University of Chicago, Chicago, Illinois, USA
 
  Funding: This work was supported by the U.S. National Science Foundation under Award No. PHY-1549132, the Center for Bright Beams.
Accelerators and other large experimental facilities are complex, noisy systems that are difficult to characterize and control efficiently. Bayesian statistical modeling techniques are well suited to this task, as they minimize the number of experimental measurements needed to create robust models, by incorporating prior, but not necessarily exact, information about the target system. Furthermore, these models inherently take into account noisy and/or uncertain measurements and can react to time-varying systems. Here we will describe several advanced methods for using these models in accelerator characterization and optimization. First, we describe a method for rapid, turn-key exploration of input parameter spaces using little-to-no prior information about the target system. Second, we highlight the use of Multi-Objective Bayesian optimization towards efficiently characterizing the experimental Pareto front of a system. Throughout, we describe how unknown constraints and parameter modification costs are incorporated into these algorithms.
 
slides icon Slides THAL02 [4.453 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THAL02  
About • Received ※ 10 October 2021       Revised ※ 10 November 2021       Accepted ※ 21 November 2021       Issue date ※ 26 December 2021
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THBL04 Kubernetes for EPICS IOCs EPICS, network, controls, detector 835
 
  • G. Knap, T.M. Cobb, Y. Moazzam, U.K. Pedersen, C.J. Reynolds
    DLS, Oxfordshire, United Kingdom
 
  EPICS IOCs at Diamond Light Source are built, deployed, and managed by a set of in-house tools that were implemented 15 years ago. This paper will detail a proof of concept to demonstrate replacing these tools and processes with modern industry standards. IOCs are packaged in containers with their unique dependencies included. IOC images are generic, and a single image is required for all containers that control a given class of device. Configuration is provided to the container in the form of a start-up script only. The configuration allows the generic IOC image to bootstrap a container for a unique IOC instance. This approach keeps the number of images required to a minimum. Container orchestration for all beamlines in the facility is provided through a central Kubernetes cluster. The cluster has remote nodes that reside within each beamline network to host the IOCs for the local beamline. All source, images and individual IOC configurations are held in repositories. Build and deployment to the production registries is handled by continuous integration. Finally, a development container provides a portable development environment for maintaining and testing IOC code.  
slides icon Slides THBL04 [0.640 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-THBL04  
About • Received ※ 11 October 2021       Revised ※ 14 October 2021       Accepted ※ 23 February 2022       Issue date ※ 01 March 2022
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FRAL01 The Laser MegaJoule Facility Status Report laser, experiment, diagnostics, operation 989
 
  • H. Cortey
    CEA, LE BARP cedex, France
 
  The Laser MegaJoule (LMJ), the French 176-beam laser facility, is located at the CEA CESTA Laboratory near Bordeaux (France). It is designed to deliver about 1.4 MJ of energy on targets, for high energy density physics experiments, including fusion experiments. The first bundle of 8-beams was commissioned in October 2014. By the end of 2021, ten bundles of 8-beams are expected to be fully operational. In this paper, we will present: - The LMJ Bundles Status report - The main evolutions of the LMJ facility since ICALEPS 2019: the new target diagnostics commissioned and a new functionality to manage final optic damage with the implementation of blockers in the beam. - the result of a major milestone for the project : ‘Fusion Milestone’  
slides icon Slides FRAL01 [7.812 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-FRAL01  
About • Received ※ 09 October 2021       Revised ※ 01 February 2022       Accepted ※ 22 February 2022       Issue date ※ 01 March 2022
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