A multi-species powder dropper for magnetic fusion applications

Nagy, A.; Bortolon, A.; Mauzey, D. M.; Wolfe, E.; Gilson, E. P.; Lunsford, R.; Maingi, R.; Mansfield, D. K.; Nazikian, R.; Roquemore, A. L.

doi:10.1063/1.5039345

Title: A multi-species powder dropper for magnetic fusion applications

Journal Article · Thu Oct 25 00:00:00 EDT 2018 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5039345· OSTI ID:1485110

Nagy, A. ^[1];

^[1]; Mauzey, D. M. ^[1]; Wolfe, E. ^[1];

^[1]; Lunsford, R. ^[1]; Maingi, R. ^[1]; Mansfield, D. K. ^[1]; Nazikian, R. ^[1]; Roquemore, A. L. ^[1]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Here, 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.

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Research Organization:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1485110

Alternate ID(s):: OSTI ID: 1479131

Journal Information:: Review of Scientific Instruments, Vol. 89, Issue 10; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 24 works

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References (8)

Dust studies in DIII-D and TEXTOR Rudakov, D. L.; Litnovsky, A.; West, W. P. Nuclear Fusion, Vol. 49, Issue 8 https://doi.org/10.1088/0029-5515/49/8/085022	journal	July 2009
ELM elimination with Li powder injection in EAST discharges using the tungsten upper divertor Maingi, R.; Hu, J. S.; Sun, Z. Nuclear Fusion, Vol. 58, Issue 2 https://doi.org/10.1088/1741-4326/aa9e3f	journal	January 2018
A Quasi-Periodic Linear Feeder for the Impurity Granular Injection on DIII-D Nagy, Alex; Bortolon, A.; Brown, W. IEEE Transactions on Plasma Science, Vol. 46, Issue 5 https://doi.org/10.1109/TPS.2018.2810129	journal	May 2018
Observations concerning the injection of a lithium aerosol into the edge of TFTR discharges Mansfield, D. K.; Johnson, D. W.; Grek, B. Nuclear Fusion, Vol. 41, Issue 12 https://doi.org/10.1088/0029-5515/41/12/310	journal	December 2001
Wall conditioning in fusion devices and its influence on plasma performance Winter, J. Plasma Physics and Controlled Fusion, Vol. 38, Issue 9 https://doi.org/10.1088/0741-3335/38/9/001	journal	September 1996
A simple apparatus for the injection of lithium aerosol into the scrape-off layer of fusion research devices Mansfield, D. K.; Roquemore, A. L.; Schneider, H. Fusion Engineering and Design, Vol. 85, Issue 6 https://doi.org/10.1016/j.fusengdes.2010.08.033	journal	November 2010
Dust in magnetic fusion devices Krasheninnikov, S. I.; Smirnov, R. D.; Rudakov, D. L. Plasma Physics and Controlled Fusion, Vol. 53, Issue 8 https://doi.org/10.1088/0741-3335/53/8/083001	journal	May 2011
Enhanced H-mode pedestals with lithium injection in DIII-D Osborne, T. H.; Jackson, G. L.; Yan, Z. Nuclear Fusion, Vol. 55, Issue 6 https://doi.org/10.1088/0029-5515/55/6/063018	journal	May 2015

Cited By (1)

Active conditioning of ASDEX Upgrade tungsten plasma-facing components and discharge enhancement through boron and boron nitride particulate injection Lunsford, R.; Rohde, V.; Bortolon, A. Nuclear Fusion, Vol. 59, Issue 12 https://doi.org/10.1088/1741-4326/ab4095	journal	October 2019