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Title |
Other Keywords |
Page |
| TUPPC055 |
Developing of the Pulse Motor Controller Electronics for Running under Weak Radiation Environment |
radiation, controls, operation, interface |
695 |
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- M. Ishizuka, N. Araki, H. Kashima, H. Mukai
Hitachi Zosen, Osaka, Japan
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Hitz Hitachi Zosen has developed new pulse motor controller. This controller which controls two axes per one controller implements high performance processor, pulse control device and peripheral interface. This controller has simply extensibility and various interface and realizes low price. We are able to operate the controller through Ethernet TCP/IP(or FLnet). Also, the controller can control max 16 axes. In addition, we want to drive the motor controller in optics hatch filled with weak radiation. If we can put the controller in optics hatch, wiring will become simple because of closed wiring in optics hatch . Therefore we have evaluated controller electronics running under weak radiation.
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Poster TUPPC055 [0.700 MB]
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| THMIB04 |
Optimizing Blocker Usage on NIF Using Image Analysis and Machine Learning |
site, laser, scattering, target |
1079 |
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- L.M. Kegelmeyer, A.D. Conder, L.A. Lane, M.C. Nostrand, J.G. Senecal, P.K. Whitman
LLNL, Livermore, California, USA
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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-633358
To optimize laser performance and minimize operating costs for high energy laser shots it is necessary to locally shadow, or block, flaws from laser light exposure in the beamline optics. Blockers are important for temporarily shadowing a flaw on an optic until the optic can be removed and repaired. To meet this need, a combination of image analysis and machine learning techniques have been developed to accurately define the list of locations where blockers should be applied. The image analysis methods extract and measure evidence of flaw candidates and their correlated downstream hot spots and this information is passed to machine learning algorithms which rank the probability that candidates are flaws that require blocking. Preliminary results indicate this method will increase the percentage of true positives from less than 20% to about 90%, while significantly reducing recall – the total number of candidates brought forward for review.
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Slides THMIB04 [0.243 MB]
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Poster THMIB04 [2.532 MB]
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| THPPC058 |
LSA - the High Level Application Software of the LHC - and Its Performance During the First Three Years of Operation |
controls, software, injection, hardware |
1201 |
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- D. Jacquet, R. Gorbonosov, G. Kruk
CERN, Geneva, Switzerland
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The LSA (LHC software architecture) project was started in 2001 with the aim of developing the high level core software for the control of the LHC accelerator. It has now been deployed widely across the CERN accelerator complex and has been largely successful in meeting its initial aims. The main functionality and architecture of the system is recalled and its use in the commissioning and exploitation of the LHC is elucidated.
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Poster THPPC058 [1.291 MB]
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| THPPC083 |
Software Tool Leverages Existing Image Analysis Results to Provide In-Situ Transmission of the NIF Disposable Debris Shields |
software, laser, alignment, target |
1270 |
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- V.J. Miller Kamm, A.A.S. Awwal, J.-M.G. Di Nicola, P. Di Nicola, S.N. Dixit, D.L. McGuigan, B.A. Raymond, K.C. Wilhelmsen
LLNL, Livermore, California, USA
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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-632472
The Disposable Debris-Shield (DDS) Attenuation Tool is software that leverages Automatic Alignment image analysis results and takes advantage of the DDS motorized insertion and removal to compute the in-situ transmission of the 192 NIF DDS. The NIF employs glass DDS to protect the final optics from debris and shrapnel generated by the laser-target interaction. Each DDS transmission must be closely monitored and replaced when its physical characteristics impact laser performance. The tool was developed to calculate the transmission by obtaining the total pixel intensity of acquired images with the debris shield inserted and removed. These total intensities existed in the Automatic Alignment image processing algorithms. The tool uses this data, adding the capability to specify DDS to test, moves the DDS, performs calculations, and saves data to an output file. It operates on all 192 beams of the NIF in parallel, and has shown a discrepancy between laser predictive models and actual. As qualification the transmission of new DDS were tested, with known transmissions supplied by the vendor. This demonstrated the tool capable of measuring in-situ DDS transmission to better than 0.5% rms.
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Poster THPPC083 [2.362 MB]
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| THPPC119 |
Software Architecture for the LHC Beam-based Feedback System at CERN |
feedback, controls, network, timing |
1337 |
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- L.K. Jensen, M. Andersen, K. Fuchsberger, S. Jackson, L. Ponce, R.J. Steinhagen, J. Wenninger
CERN, Geneva, Switzerland
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This paper presents an overview of beam based feedback systems at the LHC at CERN. It will cover the system architecture which is split into two main parts – a controller (OFC) and a service unit (OFSU). The paper presents issues encountered during beam commissioning and lessons learned including follow-up from a recent review which took place at CERN
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Poster THPPC119 [1.474 MB]
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