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@InProceedings{suthar:napac2019-moplo23,
  author       = {K.J. Suthar and D.S. Doran and W.G. Jansma and A.E. Siy and S.S. Sorsher and E. Trakhtenberg and G.J. Waldschmidt and A. Zholents},
% author       = {K.J. Suthar and D.S. Doran and W.G. Jansma and A.E. Siy and S.S. Sorsher and E. Trakhtenberg and others},
% author       = {K.J. Suthar and others},
  title        = {{Investigation of Various Fabrication Methods to Produce a 180GHz Corrugated Waveguide Structure in 2mm Diameter ­0.5m ­Long Copper Tube for the Compact Wakefield Accelerator for FEL Facility}},
  booktitle    = {Proc. NAPAC'19},
  pages        = {286--289},
  paper        = {MOPLO23},
  language     = {english},
  keywords     = {GUI, laser, electron, wakefield, FEL},
  venue        = {Lansing, MI, USA},
  series       = {North American Particle Accelerator Conference},
  number       = {4},
  publisher    = {JACoW Publishing, Geneva, Switzerland},
  month        = {10},
  year         = {2019},
  issn         = {2673-7000},
  isbn         = {978-3-95450-223-3},
  doi          = {10.18429/JACoW-NAPAC2019-MOPLO23},
  url          = {http://jacow.org/napac2019/papers/moplo23.pdf},
  note         = {https://doi.org/10.18429/JACoW-NAPAC2019-MOPLO23},
  abstract     = {Argonne National Laboratory is developing a 180 GHz wakefield structure that will house in a co-linear array of accelerators to produce free-electron laser-based X-rays. The proposed corrugated waveguide structure will be fabricated on the internal wall of 0.5m long and 2mm nominal diameter copper tube. The estimated dimensions of these parallel corrugations are 200 µm in pitch with 100 µm side length (height and width). The length scale of the structure and requirements of the magnetic field-driven dimensional tolerances have made the structure challenging to produce. We have employed several method such as optical lithography, electroforming, electron discharge machining, laser ablation, and stamping to produce the initial structure from a sheet form. The successive fabrication steps, such as bending, brazing, and welding, were performed to achieve the long tubular-structure. This paper discusses various fabrication techniques, characterization, and associated technical challenges in detail.},
}