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Title: ORNL/IAT ARMATURE DIAGNOSTICS DEMONSTRATION TEST REPORT

Abstract

This test established feasibility for 'on the fly' temperature measurements of rail gun projectiles. In addition, an approach for projectile velocity measurement was also demonstrated. Insight was gained into other useful optical and fiberoptic diagnostic approaches. Instantaneous diagnostics could be critical for achieving further improvements in rail gun operation. They have the potential to enable design enhancements by providing information on the state of the armature and its relationship to the rail as it proceeds down the bore. To that end, the following was accomplished: (1) Optical fibers successfully delivered optical excitation and returned reflective and fluorescence signals as desired. (2) Luminescent coatings survived multiple firings--approximately 40 shots. (3) Optical triggering effectively synchronized an ultraviolet laser pulse to strike the moving armature. (4) Velocity measurements were successfully accomplished by either triggering on the armature front edge using two red diode lasers or by using a single laser and grooved marks a known distance apart on the armature surface. (5) Velocities ranged from 19 to 88 m/s. (6) Temperatures of 30 to 92 C were measured with a precision of about 2 C-: (a) This precision was achieved with a single laser shot and (b) Motion effect was observed but amore » methodology adequately corrected the result. The correction was only about 2 C. (7) Adequate signal-to-noise and measurement precision was achieved with a single laser shot.« less

Authors:
 [1];  [1];  [1];  [2];  [2];  [3]
  1. ORNL
  2. Institute for Advanced Technology, Austin, TX
  3. Diditco, Inc., Knoxville
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE; Work for Others (WFO)
OSTI Identifier:
930855
Report Number(s):
ORNL/TM-2006/595
WN0219080; TRN: US200813%%289
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ARMATURES; COATINGS; DESIGN; EXCITATION; FLUORESCENCE; OPTICAL FIBERS; TEMPERATURE MEASUREMENT; DIAGNOSTIC TECHNIQUES; PERFORMANCE TESTING

Citation Formats

Allison, Stephen W, Cates, Michael R, Goedeke, Shawn, Crawford, M. T., Ferraro, S. B., and Akerman, A. ORNL/IAT ARMATURE DIAGNOSTICS DEMONSTRATION TEST REPORT. United States: N. p., 2005. Web. doi:10.2172/930855.
Allison, Stephen W, Cates, Michael R, Goedeke, Shawn, Crawford, M. T., Ferraro, S. B., & Akerman, A. ORNL/IAT ARMATURE DIAGNOSTICS DEMONSTRATION TEST REPORT. United States. https://doi.org/10.2172/930855
Allison, Stephen W, Cates, Michael R, Goedeke, Shawn, Crawford, M. T., Ferraro, S. B., and Akerman, A. 2005. "ORNL/IAT ARMATURE DIAGNOSTICS DEMONSTRATION TEST REPORT". United States. https://doi.org/10.2172/930855. https://www.osti.gov/servlets/purl/930855.
@article{osti_930855,
title = {ORNL/IAT ARMATURE DIAGNOSTICS DEMONSTRATION TEST REPORT},
author = {Allison, Stephen W and Cates, Michael R and Goedeke, Shawn and Crawford, M. T. and Ferraro, S. B. and Akerman, A.},
abstractNote = {This test established feasibility for 'on the fly' temperature measurements of rail gun projectiles. In addition, an approach for projectile velocity measurement was also demonstrated. Insight was gained into other useful optical and fiberoptic diagnostic approaches. Instantaneous diagnostics could be critical for achieving further improvements in rail gun operation. They have the potential to enable design enhancements by providing information on the state of the armature and its relationship to the rail as it proceeds down the bore. To that end, the following was accomplished: (1) Optical fibers successfully delivered optical excitation and returned reflective and fluorescence signals as desired. (2) Luminescent coatings survived multiple firings--approximately 40 shots. (3) Optical triggering effectively synchronized an ultraviolet laser pulse to strike the moving armature. (4) Velocity measurements were successfully accomplished by either triggering on the armature front edge using two red diode lasers or by using a single laser and grooved marks a known distance apart on the armature surface. (5) Velocities ranged from 19 to 88 m/s. (6) Temperatures of 30 to 92 C were measured with a precision of about 2 C-: (a) This precision was achieved with a single laser shot and (b) Motion effect was observed but a methodology adequately corrected the result. The correction was only about 2 C. (7) Adequate signal-to-noise and measurement precision was achieved with a single laser shot.},
doi = {10.2172/930855},
url = {https://www.osti.gov/biblio/930855}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 01 00:00:00 EST 2005},
month = {Tue Mar 01 00:00:00 EST 2005}
}