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Title: Methods for improving the damage performance of fused silica polished by magnetorheological finishing

The laser-induced damage threshold of fused-silica samples processed via magnetorheological finishing is investigated for polishing compounds depending on the type of abrasive material and the post-polishing surface roughness. The effectiveness of laser conditioning is examined using a ramped pre-exposure with the same 351-nm, 3-ns Gaussian pulses. Lastly, we examine chemical etching of the surface and correlate the resulting damage threshold to the etching protocol. A combination of etching and laser conditioning is found to improve the damage threshold by a factor of ~3, while maintaining <1-nm surface roughness.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [1] ;  [1]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
  2. QED Technologies, Rochester, NY (United States)
Publication Date:
Report Number(s):
2017-97; 13-81
Journal ID: ISSN 0277-786X; 2017-97, 1381, 2338
Grant/Contract Number:
NA0001944
Type:
Accepted Manuscript
Journal Name:
Proceedings of SPIE - The International Society for Optical Engineering
Additional Journal Information:
Journal Volume: 10447; Conference: 49. Annual Symposium on Optical Materials for High Power Lasers, Boulder, CO (United States), 24-27 Sep 2017; Journal ID: ISSN 0277-786X
Publisher:
SPIE
Research Org:
Univ. of Rochester, NY (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Laser-induced damage; magnetorheological finishing
OSTI Identifier:
1426482

Kafka, Kyle R. P., Hoffman, Brittany N., Papernov, Semyon, DeMarco, Michael A., Hall, Christopher A., Marshall, Kenneth L., and Demos, Stavros G.. Methods for improving the damage performance of fused silica polished by magnetorheological finishing. United States: N. p., Web. doi:10.1117/12.2281479.
Kafka, Kyle R. P., Hoffman, Brittany N., Papernov, Semyon, DeMarco, Michael A., Hall, Christopher A., Marshall, Kenneth L., & Demos, Stavros G.. Methods for improving the damage performance of fused silica polished by magnetorheological finishing. United States. doi:10.1117/12.2281479.
Kafka, Kyle R. P., Hoffman, Brittany N., Papernov, Semyon, DeMarco, Michael A., Hall, Christopher A., Marshall, Kenneth L., and Demos, Stavros G.. 2017. "Methods for improving the damage performance of fused silica polished by magnetorheological finishing". United States. doi:10.1117/12.2281479.
@article{osti_1426482,
title = {Methods for improving the damage performance of fused silica polished by magnetorheological finishing},
author = {Kafka, Kyle R. P. and Hoffman, Brittany N. and Papernov, Semyon and DeMarco, Michael A. and Hall, Christopher A. and Marshall, Kenneth L. and Demos, Stavros G.},
abstractNote = {The laser-induced damage threshold of fused-silica samples processed via magnetorheological finishing is investigated for polishing compounds depending on the type of abrasive material and the post-polishing surface roughness. The effectiveness of laser conditioning is examined using a ramped pre-exposure with the same 351-nm, 3-ns Gaussian pulses. Lastly, we examine chemical etching of the surface and correlate the resulting damage threshold to the etching protocol. A combination of etching and laser conditioning is found to improve the damage threshold by a factor of ~3, while maintaining <1-nm surface roughness.},
doi = {10.1117/12.2281479},
journal = {Proceedings of SPIE - The International Society for Optical Engineering},
number = ,
volume = 10447,
place = {United States},
year = {2017},
month = {12}
}