Low Level Signal Data Acquisition For The Mftf B Superconducting Magnet System
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Release | : 1984 |
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Acquisition of low level signals from sensors mounted on the superconducting magnets in the Tandem Mirror Fusion Test Facility (MFTF-B) impose very strict requirements on the magnet signal conditioning and data acquisition system. Of the various types of sensors required, thermocouples and strain gages produce very low level outputs. These low level outputs must be accurately measured in the harsh environment of slowly varying magnetic fields, cryogenic temperatures, high vacuum, 80 kV pulse power, 60 Hz, 17 MHz and 28, 35, and 56 GHz electrical noise and possible neutron radiation. Successful measurements require careful attention to grounding, shielding, signal handling and processing in the data acquisition system. The magnet instrumentation system provides a means of effectively measuring both low level signals and high level signals from all types of sensors. Various methods involved in the design and implementation of the system for signal conditioning and data gathering will be presented.
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Total Pages | : 592 |
Release | : 1991 |
Genre | : Power resources |
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Total Pages | : 184 |
Release | : 1982 |
Genre | : Controlled fusion |
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Total Pages | : 986 |
Release | : 1984 |
Genre | : Physics |
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Total Pages | : 1062 |
Release | : 1987 |
Genre | : Nuclear energy |
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Total Pages | : 632 |
Release | : 1984 |
Genre | : Power resources |
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Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.
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Total Pages | : 1036 |
Release | : 1984-10 |
Genre | : Government publications |
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Total Pages | : 1096 |
Release | : 1981 |
Genre | : Controlled fusion |
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Release | : 2011 |
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A hybrid data acquisition system was developed for magnetic measurement of superconducting accelerator magnets at LBNL. It consists of a National Instruments dynamic signal acquisition (DSA) card and two Metrolab fast digital integrator (FDI) cards. The DSA card records the induced voltage signals from the rotating probe while the FDI cards records the flux increment integrated over a certain angular step. This allows the comparison of the measurements performed with two cards. In this note, the setup and test of the system is summarized. With a probe rotating at a speed of 0.5 Hz, the multipole coefficients of two magnets were measured with the hybrid system. The coefficients from the DSA and FDI cards agree with each other, indicating that the numerical integration of the raw voltage acquired by the DSA card is comparable to the performance of the FDI card in the current measurement setup.
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Total Pages | : 1160 |
Release | : 1986 |
Genre | : Aeronautics |
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