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- A. Nagy
- Princeton Plasma Physics Laboratory , Princeton, New Jersey 08543, USA
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- A. Bortolon
- Princeton Plasma Physics Laboratory , Princeton, New Jersey 08543, USA
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- D. M. Mauzey
- Princeton Plasma Physics Laboratory , Princeton, New Jersey 08543, USA
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- E. Wolfe
- Princeton Plasma Physics Laboratory , Princeton, New Jersey 08543, USA
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- E. P. Gilson
- Princeton Plasma Physics Laboratory , Princeton, New Jersey 08543, USA
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- R. Lunsford
- Princeton Plasma Physics Laboratory , Princeton, New Jersey 08543, USA
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- R. Maingi
- Princeton Plasma Physics Laboratory , Princeton, New Jersey 08543, USA
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- D. K. Mansfield
- Princeton Plasma Physics Laboratory , Princeton, New Jersey 08543, USA
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- R. Nazikian
- Princeton Plasma Physics Laboratory , Princeton, New Jersey 08543, USA
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- A. L. Roquemore
- Princeton Plasma Physics Laboratory , Princeton, New Jersey 08543, USA
説明
<jats:p>We present a device for controlled injection of a variety of materials in powder form. The system implements four independent feeder units, arranged to share a single vertical drop tube. Each unit consists of a 80 ml reservoir, coupled to a horizontal linear trough, where a layer of powder is advanced by piezo-electric agitation at a speed proportional to the applied voltage, until it falls into a drop tube. The dropper has been tested with a number of impurities of low (B, BN, C), intermediate (Si, SiC), and high Z (Sn) and a variety of microscopic structures (flakes, spheres, rocks) and sizes (5-200 μm). For low Z materials, drop rates ∼2-200 mg/s have been obtained showing good repeatability and uniformity. A calibrated light-emitting diode (LED)-based flowmeter allows measuring and monitoring the drop rate during operation. The fast time-response of the four feeders allows combination of steady and pulsed injections, providing a flexible tool for controlled-dose, real-time impurity injection in fusion plasmas.</jats:p>
収録刊行物
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- Review of Scientific Instruments
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Review of Scientific Instruments 89 (10), 10K121-, 2018-10-01
AIP Publishing