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Title: Comparison of Deformation in High-Purity Single/Large Grain and Polycrystalline Niobium Superconducting Cavities

Abstract

The current approach for the fabrication of superconducting radio frequency (SRF) cavities is to roll and deep draw sheets of polycrystalline high-purity niobium. Recently, a new technique was developed at Jefferson Laboratory that enables the fabrication of single-crystal high-purity Nb SRF cavities. To better understand the differences between SRF cavities fabricated out of fine-grained polycrystalline sheet in the standard manner and single crystal cavities fabricated by the new technique, two half-cells were produced according to the two different procedures and compared using a variety of analytical techniques including optical microscopy, scanning laser confocal microscopy, profilometry, and X-ray diffraction. Crystallographic orientations, texture, and residual stresses were determined in the samples before and after forming and this poster presents the results of this ongoing study.

Authors:
;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA
Sponsoring Org.:
USDOE - Office of Energy Research (ER)
OSTI Identifier:
876415
Report Number(s):
JLAB-ACC-05-313; DOE/ER/40150-3758
TRN: US0601194
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Conference
Resource Relation:
Conference: 12th SRF Workshop, Cornell University, July 10, 2005
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; CAVITIES; CEBAF ACCELERATOR; DEFORMATION; FABRICATION; LASERS; MICROSCOPY; MONOCRYSTALS; NIOBIUM; OPTICAL MICROSCOPY; RESIDUAL STRESSES; TEXTURE; X-RAY DIFFRACTION

Citation Formats

Myneni, Ganapati Rao, and Kneisel, Peter. Comparison of Deformation in High-Purity Single/Large Grain and Polycrystalline Niobium Superconducting Cavities. United States: N. p., 2005. Web.
Myneni, Ganapati Rao, & Kneisel, Peter. Comparison of Deformation in High-Purity Single/Large Grain and Polycrystalline Niobium Superconducting Cavities. United States.
Myneni, Ganapati Rao, and Kneisel, Peter. Sun . "Comparison of Deformation in High-Purity Single/Large Grain and Polycrystalline Niobium Superconducting Cavities". United States. https://www.osti.gov/servlets/purl/876415.
@article{osti_876415,
title = {Comparison of Deformation in High-Purity Single/Large Grain and Polycrystalline Niobium Superconducting Cavities},
author = {Myneni, Ganapati Rao and Kneisel, Peter},
abstractNote = {The current approach for the fabrication of superconducting radio frequency (SRF) cavities is to roll and deep draw sheets of polycrystalline high-purity niobium. Recently, a new technique was developed at Jefferson Laboratory that enables the fabrication of single-crystal high-purity Nb SRF cavities. To better understand the differences between SRF cavities fabricated out of fine-grained polycrystalline sheet in the standard manner and single crystal cavities fabricated by the new technique, two half-cells were produced according to the two different procedures and compared using a variety of analytical techniques including optical microscopy, scanning laser confocal microscopy, profilometry, and X-ray diffraction. Crystallographic orientations, texture, and residual stresses were determined in the samples before and after forming and this poster presents the results of this ongoing study.},
doi = {},
url = {https://www.osti.gov/biblio/876415}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {7}
}

Conference:
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