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Active Filter Hardware Design & Performance for the DIII-D Plasma Control System

Description: OAK-B135 The digital plasma control system (PCS), currently in operation on the DIII-D tokamak, requires inputs from a large number of sensors. Due to the nature of the digitizers and the relative noisy environment from which these signals are derived, each of the 32 signals must be conditioned via an active filter. Two different types of filters, Chebyshev and Bessel with fixed frequencies: 100 Hz Bessel was used for filtering the motional Stark effect diagnostic data. 800 Hz Bessel was design… more
Date: October 1, 2003
Creator: Sellers, D.; Ferron, J. R.; Walker, M. L. & Broesch, J. D.
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Partner: UNT Libraries Government Documents Department
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CURRENT STATUS OF DIII-D PLASMA CONTORL SYSTEM COMPUTER UPGADES

Description: OAK-B135 This paper presents the latest status of the DIII-D Real-Time Digital Plasma Control System (PCS). The primary focus will be on the new computing and data acquisition hardware recently incorporated into the PCS and the added features provided by the new hardware. The upgrade of the PCS real-time computing and data acquisition hardware has been in progress for the past three and a half years. Since the initial proposal to migrate off the old VME i860 based system to more modern computin… more
Date: July 2003
Creator: Penaflor, B. G.; Ferron, J. R.; Johnson, R. D. & Piglowski, D. A.
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Partner: UNT Libraries Government Documents Department
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Recent Developments in Alternatives to Camac for Data Acquisition at Diii-D

Description: OAK-B135 For over twenty years, data acquisition hardware at DIII-D has been based on the CAMAC platform. These rugged and reliable systems, however, are gradually becoming obsolete due to end-of-life issues, ever-decreasing industry support of older hardware, and the availability of modern alternative hardware with superior performance. Efforts are underway at DIII-D to adopt new data acquisition solutions which exploit modern technologies and surpass the limitations of the CAMAC standard. The… more
Date: October 1, 2003
Creator: Kellman, D. H.; Campbell, G. L.; Ferron, J. R.; Piglowski, D. A.; Austin, M. E. & McKee, G. R.
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Partner: UNT Libraries Government Documents Department
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DATA ACQUISITION AND PROTECTION FOR NEW DII-D IN-VESSEL COILS

Description: OAK-B135 The installation of new internal magnetic coils (I-Coils) in the DIII-D tokamak at General Atomics required extensive additions to the experiment data acquisition and protection capabilities. This set of 12 coils (up to 7 kA each) is designed to allow improved feedback stabilization of resistive wall modes which limit the plasma performance. The acquisition and signal conditions needs of the I-Coil power system presented an opportunity to try a new data acquisition approach which incre… more
Date: October 2003
Creator: Campbell, G. L.; Szymanski, D. D.; Piglowski, D. A.; Kellman, D. H.; Anderson, P. M.; Jackson, G. L. et al.
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Partner: UNT Libraries Government Documents Department
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Test Stand for Linear Induction Accelerator Optimization

Description: Lawrence Livermore National Laboratory has designed and constructed a test stand to improve the voltage regulation in our Flash X-Ray (FXR) accelerator cell. The goal is to create a more mono-energetic electron beam that will create an x-ray source with a smaller spot size. Studying the interaction of the beam and pulse-power system with the accelerator cell will improve the design of high-current accelerators at Livermore and elsewhere. On the test stand, a standard FXR cell is driven by a fle… more
Date: June 3, 2003
Creator: Ong, M.; DeHope, B.; Griffin, K.; Goerz, D.; Kihara, R.; Vogtlin, G. et al.
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Partner: UNT Libraries Government Documents Department
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The digital optical module - How IceCube will acquire data

Description: IceCube will be a km-scale neutrino detector consisting of 4800 optical modules (OMs) on 80 strings of 60 OMs each. The DAQ technology will have the following desirable features: (1) the robustness of copper cable between the OMs and the surface. (2) digitization and time-stamping of signals that are unattenuated and undispersed. (3) calibration methods (particularly for timing) appropriate for a large number of OMs. The PMT anode waveform is digitized and time-stamped in the OM. The time calib… more
Date: January 9, 2003
Creator: Stokstad, R.G.
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Partner: UNT Libraries Government Documents Department
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