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1

Digitale Medien

Infrared thermography of the DIII-D divertor targets (1988)

Hill, D. N. ; Ellis, R. ; Ferguson, W. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 59 (1988), S. 1878-1880

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: The power flow to the DIII-D divertor targets is routinely measured using infrared (IR) thermography. An IR television camera sensitive to radiation in the 8–12-μm range views the divertor region using a set of germanium optics. Digital signal processing is used to extract the desired surface temperature profiles from the analog data ((approximately-equal-to)12 Mbytes) stored on videotape. Inversion of these data using a simple matrix formulation of the inverse heat conduction problem then yields the incident heat flux as a function of space and time. Results from a DIII-D discharge are included.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1140040

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2

Digitale Medien

Diagnostic system for measurement of particle balance in TMX-U (1986)

Allen, S. L. ; Correll, D. L. ; Hill, D. N. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 57 (1986), S. 2072-2074

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: Several diagnostics measure the particle sources and losses in the Tandem Mirror Experiment-Upgrade (TMX-U) plasma. An absolutely calibrated high-speed (0.5 ms per frame) filtered (6561 A(ring)) video camera measures the total ionization source as a function of radius. An axial view of the plasma automatically integrates the axial variations within the depth of field of the system. Another camera, viewing the plasma radially, measures the axial source variations near the deuterium fueling source. Axial ion losses are measured by an array of Faraday cups that are equipped with grids for repelling electrons and are mounted at each end of the experiment. Unequal ion and electron (nonambipolar) radial losses are inferred from net current measurements on an array of grounded plates at each end. Any differences between the measured particle losses and sources may be attributed to ambipolar radial losses and/or azimuthal asymmetries in the particle-loss profiles. Methods of system calibration, along with details of computer data acquisition and processing of this relatively large set of data, are also presented.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1138742

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3

Digitale Medien

Neutral-beam performance analysis using a CCD camera (1986)

Hill, D. N. ; Allen, S. L. ; Pincosy, P. A.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 57 (1986), S. 2069-2071

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: We have developed an optical diagnostic system suitable for characterizing the performance of energetic neutral beams. An absolutely calibrated CCD video camera is used to view the neutral beam as it passes through a relatively high-pressure (10−5 Torr) region outside the neutralizer: collisional excitation of the fast deuterium atoms produces Hα emission (λ=6561 A(ring)) that is proportional to the local atomic current density, nearly independent of the species mix of accelerated ions over the energy range 5–20 keV. Digital processing of the video signal provides profile and aiming information for beam optimization.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1138741

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4

Digitale Medien

Tandem-Mirror Experiment-Upgrade neutral pressure measurement diagnostic systems (1985)

Pickles, W. L. ; Allen, S. L. ; Hill, D. N. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 56 (1985), S. 978-980

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ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: The Tandem-Mirror Experiment-Upgrade (TMX-U) has a large and complex system of Bayard–Alpert, magnetron, and Penning gauges, in addition to mass spectrometers (RGA), all of which measure neutral pressures in the many internal regions of TMX-U. These pressure measurements are used as part of the confinement physics data base as well as for management of the TMX-U vacuum system. Dynamic pressures are modeled by a coupled-volumes simulation code, which includes wall reflux, getter pumping, and plasma pumping.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1138010

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