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Title: Electrostatic Dust Detector with Improved Sensitivity

Abstract

Methods to measure the inventory of dust particles and to remove dust if it approaches safety limits will be required in next-step tokamaks such as ITER. An electrostatic dust detector, based on a fine grid of interlocking circuit traces, biased to 30 or 50 V, has been developed for the detection of dust on remote surfaces in air and vacuum environments. Gaining operational experience of dust detection on surfaces in tokamaks is important, however the level of dust generated in contemporary short-pulse tokamaks is comparatively low and high sensitivity is necessary to measure dust on a shot-by-shot basis. We report on modifications in the detection electronics that have increased the sensitivity of the electrostatic dust detector by a factor of up to 120, - a level suitable for measurements on contemporary tokamaks.

Authors:
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
959343
Report Number(s):
PPPL-4320
TRN: US1005729
DOE Contract Number:  
DE-ACO2-76CHO3073
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AIR; DETECTION; DUSTS; ELECTROSTATICS; MODIFICATIONS; SAFETY; SENSITIVITY; TOKAMAK DEVICES; Dust, Erosion and Deposition, Iter, P0500 Plasma-Materials Interac tion, S0100 Safety of Nuclear reactors and Components, CO100 Carbon

Citation Formats

D.P. Boyle, C.H. Skinner, and A. L. Roquemore. Electrostatic Dust Detector with Improved Sensitivity. United States: N. p., 2008. Web. doi:10.2172/959343.
D.P. Boyle, C.H. Skinner, and A. L. Roquemore. Electrostatic Dust Detector with Improved Sensitivity. United States. doi:10.2172/959343.
D.P. Boyle, C.H. Skinner, and A. L. Roquemore. Mon . "Electrostatic Dust Detector with Improved Sensitivity". United States. doi:10.2172/959343. https://www.osti.gov/servlets/purl/959343.
@article{osti_959343,
title = {Electrostatic Dust Detector with Improved Sensitivity},
author = {D.P. Boyle, C.H. Skinner, and A. L. Roquemore},
abstractNote = {Methods to measure the inventory of dust particles and to remove dust if it approaches safety limits will be required in next-step tokamaks such as ITER. An electrostatic dust detector, based on a fine grid of interlocking circuit traces, biased to 30 or 50 V, has been developed for the detection of dust on remote surfaces in air and vacuum environments. Gaining operational experience of dust detection on surfaces in tokamaks is important, however the level of dust generated in contemporary short-pulse tokamaks is comparatively low and high sensitivity is necessary to measure dust on a shot-by-shot basis. We report on modifications in the detection electronics that have increased the sensitivity of the electrostatic dust detector by a factor of up to 120, - a level suitable for measurements on contemporary tokamaks.},
doi = {10.2172/959343},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jun 09 00:00:00 EDT 2008},
month = {Mon Jun 09 00:00:00 EDT 2008}
}

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