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Title: Liquid Lithium Divertor and Scrape-Off-Layer Interactions on the National Spherical Torus Experiment:2010 ₋2013 Progress Report

Abstract

The implementation of the liquid Lithium Divertor (LLD) in NSTX presented a unique opportunity in plasma-material interactions studies. A high density Langmuir Probe (HDLP) array utilizing a dense pack of triple Langmuir probes was built at PPPL and the electronics designed and built by UIUC. It was shown that the HDLP array could be used to characterize the modification of the EEDF during lithium experiments on NSTX as well as characterize the transient particle loads during lithium experiments as a means to study ELMs. With NSTX being upgraded and a new divertor being installed, the HDLP array will not be used in NSTX-U. However UIUC is currently helping to develop two new systems for depositing lithium into NSTX-U, a Liquid Lithium Pellet Dripper (LLPD) for use with the granular injector for ELM mitigation and control studies as well as an Upward-Facing Lithium Evaporator (U-LITER) based on a flash evaporation system using an electron beam. Currently UIUC has Daniel Andruczyk Stationed at PPPL and is developing these systems as well as being involved in preparing the Materials Analysis Particle Probe (MAPP) for use in LTX and NSTX-U. To date the MAPP preparations have been completed. New sample holders were designed bymore » UIUC?s Research Engineer at PPPL and manufactured at PPPL and installed. MAPP is currently being used on LTX to do calibration and initial studies. The LLPD has demonstrated that it can produce pellets. There is still some adjustments needed to control the frequency and particle size. Equipment for the U-LITER has arrived and initial test are being made of the electron beam and design of the U-LITER in progress. It is expected to have these ready for the first run campaign of NSTX-U.« less

Authors:
 [1];  [1]
  1. Univ. of Illinois, Urbana-Champaign, IL (United States)
Publication Date:
Research Org.:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1091209
DOE Contract Number:  
FG02-08ER54992
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Lithium; NSTX; Divertor; scrape off layer; fusion; Plasma; Plasma material interactions; materials

Citation Formats

Ruzic, David N., and Andruczyk, Daniel. Liquid Lithium Divertor and Scrape-Off-Layer Interactions on the National Spherical Torus Experiment:2010 ₋2013 Progress Report. United States: N. p., 2013. Web. doi:10.2172/1091209.
Ruzic, David N., & Andruczyk, Daniel. Liquid Lithium Divertor and Scrape-Off-Layer Interactions on the National Spherical Torus Experiment:2010 ₋2013 Progress Report. United States. https://doi.org/10.2172/1091209
Ruzic, David N., and Andruczyk, Daniel. 2013. "Liquid Lithium Divertor and Scrape-Off-Layer Interactions on the National Spherical Torus Experiment:2010 ₋2013 Progress Report". United States. https://doi.org/10.2172/1091209. https://www.osti.gov/servlets/purl/1091209.
@article{osti_1091209,
title = {Liquid Lithium Divertor and Scrape-Off-Layer Interactions on the National Spherical Torus Experiment:2010 ₋2013 Progress Report},
author = {Ruzic, David N. and Andruczyk, Daniel},
abstractNote = {The implementation of the liquid Lithium Divertor (LLD) in NSTX presented a unique opportunity in plasma-material interactions studies. A high density Langmuir Probe (HDLP) array utilizing a dense pack of triple Langmuir probes was built at PPPL and the electronics designed and built by UIUC. It was shown that the HDLP array could be used to characterize the modification of the EEDF during lithium experiments on NSTX as well as characterize the transient particle loads during lithium experiments as a means to study ELMs. With NSTX being upgraded and a new divertor being installed, the HDLP array will not be used in NSTX-U. However UIUC is currently helping to develop two new systems for depositing lithium into NSTX-U, a Liquid Lithium Pellet Dripper (LLPD) for use with the granular injector for ELM mitigation and control studies as well as an Upward-Facing Lithium Evaporator (U-LITER) based on a flash evaporation system using an electron beam. Currently UIUC has Daniel Andruczyk Stationed at PPPL and is developing these systems as well as being involved in preparing the Materials Analysis Particle Probe (MAPP) for use in LTX and NSTX-U. To date the MAPP preparations have been completed. New sample holders were designed by UIUC?s Research Engineer at PPPL and manufactured at PPPL and installed. MAPP is currently being used on LTX to do calibration and initial studies. The LLPD has demonstrated that it can produce pellets. There is still some adjustments needed to control the frequency and particle size. Equipment for the U-LITER has arrived and initial test are being made of the electron beam and design of the U-LITER in progress. It is expected to have these ready for the first run campaign of NSTX-U.},
doi = {10.2172/1091209},
url = {https://www.osti.gov/biblio/1091209}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 27 00:00:00 EDT 2013},
month = {Tue Aug 27 00:00:00 EDT 2013}
}