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Title: Method and apparatus for debris mitigation for an electrical discharge source

Abstract

Method and apparatus for mitigating the transport of debris generated and dispersed from electric discharge sources by thermophoretic and electrostatic deposition. A member is positioned adjacent the front electrode of an electric discharge source and used to establish a temperature difference between it and the front electrode. By flowing a gas between the member and the front electrode a temperature gradient is established that can be used for thermophoretic deposition of particulate debris on either the member or front electrode depending upon the direction of the thermal gradient. Establishing an electric field between the member and front electrode can aid in particle deposition by electrostatic deposition.

Inventors:
 [1];  [2];  [3]
  1. San Clemente, CA
  2. Albuquerque, NM
  3. Helena, CA
Publication Date:
Research Org.:
Sandia National Laboratories (SNL-NM), Albuquerque, NM
Sponsoring Org.:
USDOE
OSTI Identifier:
908608
Patent Number(s):
6,989,629
Assignee:
EUV LLC (Santa Clara, CA) ALO
DOE Contract Number:
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Klebanoff, Leonard E, Rader, Daniel J, and Silfvast, William T. Method and apparatus for debris mitigation for an electrical discharge source. United States: N. p., 2006. Web.
Klebanoff, Leonard E, Rader, Daniel J, & Silfvast, William T. Method and apparatus for debris mitigation for an electrical discharge source. United States.
Klebanoff, Leonard E, Rader, Daniel J, and Silfvast, William T. Tue . "Method and apparatus for debris mitigation for an electrical discharge source". United States. doi:. https://www.osti.gov/servlets/purl/908608.
@article{osti_908608,
title = {Method and apparatus for debris mitigation for an electrical discharge source},
author = {Klebanoff, Leonard E and Rader, Daniel J and Silfvast, William T},
abstractNote = {Method and apparatus for mitigating the transport of debris generated and dispersed from electric discharge sources by thermophoretic and electrostatic deposition. A member is positioned adjacent the front electrode of an electric discharge source and used to establish a temperature difference between it and the front electrode. By flowing a gas between the member and the front electrode a temperature gradient is established that can be used for thermophoretic deposition of particulate debris on either the member or front electrode depending upon the direction of the thermal gradient. Establishing an electric field between the member and front electrode can aid in particle deposition by electrostatic deposition.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 24 00:00:00 EST 2006},
month = {Tue Jan 24 00:00:00 EST 2006}
}

Patent:

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  • Method and apparatus for mitigating the transport of debris generated and dispersed from electric discharge sources by thermophoretic and electrostatic deposition. A member is positioned adjacent the front electrode of an electric discharge source and used to establish a temperature difference between it and the front electrode. By flowing a gas between the member and the front electrode a temperature gradient is established that can be used for thermophoretic deposition of particulate debris on either the member or front electrode depending upon the direction of the thermal gradient. Establishing an electric field between the member and front electrode can aidmore » in particle deposition by electrostatic deposition.« less
  • This patent describes a capillary discharge apparatus, comprising: means for defining a capillary having walls comprising condensed phase thermonuclear fusible material and having a selected diameter D and length L such that L/D is at least 100; means for creating an electrical current discharge along the axis of the capillary to produce a plasma within the capillary; and means for actuating the electrical discharge current creating means to create a current discharge with sufficient amplitude and rise time for the selected D and L to cause a core plasma to be formed within the capillary at a temperature of atmore » least 2 million degrees Kelvin and greater.« less
  • An apparatus and method to contain plasma at optimal fill capacity of a metallic container is disclosed. The invention includes the utilization of anodized layers forming the internal surfaces of the container volume. Bias resistors are calibrated to provide constant current at variable voltage conditions. By choosing the appropriate values of the bias resistors, the voltages of the metallic container relative to the voltage of an anode are adjusted to achieve optimal plasma fill while minimizing the chance of reaching the breakdown voltage of the anodized layer.
  • A method for electrical cable testing by Pulse-Arrested Spark Discharge (PASD) uses the cable response to a short-duration high-voltage incident pulse to determine the location of an electrical breakdown that occurs at a defect site in the cable. The apparatus for cable testing by PASD includes a pulser for generating the short-duration high-voltage incident pulse, at least one diagnostic sensor to detect the incident pulse and the breakdown-induced reflected and/or transmitted pulses propagating from the electrical breakdown at the defect site, and a transient recorder to record the cable response. The method and apparatus are particularly useful to determine themore » location of defect sites in critical but inaccessible electrical cabling systems in aging aircraft, ships, nuclear power plants, and industrial complexes.« less
  • A method for electrical cable testing by Pulse-Arrested Spark Discharge (PASD) uses the cable response to a short-duration high-voltage incident pulse to determine the location of an electrical breakdown that occurs at a defect site in the cable. The apparatus for cable testing by PASD includes a pulser for generating the short-duration high-voltage incident pulse, at least one diagnostic sensor to detect the incident pulse and the breakdown-induced reflected and/or transmitted pulses propagating from the electrical breakdown at the defect site, and a transient recorder to record the cable response. The method and apparatus are particularly useful to determine themore » location of defect sites in critical but inaccessible electrical cabling systems in aging aircraft, ships, nuclear power plants, and industrial complexes.« less