| Title |
Design of Miniature Waveguides and Diamond Window Assembly for RF Extraction and Vacuum Isolation for the CWA |
| Authors |
- B.K. Popovic, S.H. Lee, S. Sorsher, K.J. Sutharpresenter, E. Trakhtenberg, G.J. Waldschmidt, A. Zholents
ANL, Lemont, Illinois, USA
- A.E. Siy
UW-Madison, Madison, Wisconsin, USA
|
| Abstract |
This paper outlines the design of a diamond vacuum window and a millimeter wavelength (mmWave) waveguide assembly that will hold vacuum but still allow the mmWaves to propagate out of the structure for diagnosis and thermal management purposes. Currently under development at Argonne is a corrugated wakefield accelerator (CWA) that will operate at mmWave frequencies, with its fundamental mode of operation at 180 GHz, and relatively high power levels, up to 600 W. The fundamental mode needs to be extracted from the accelerator at approximately every 0.5 m to prevent the unwanted heating of the accelerator structure. Therefore, the structure is intentionally designed so this fundamental mode does not propagate further, instead it is transmitted through the waveguide assembly under vacuum and out via the vacuum window. As a result of the relatively high mmWave power densities, CVD diamond was chosen as the vacuum window material, due to its low electromagnetic losses, mechanical strength, and for its superior thermo-physical properties. Mechanically it is necessary to be able to hold the tight tolerances necessary for windows performance at millimeter wavelengths. Other mechanical difficulties involve assembly of the window due to CVD diamond material and preservation of ultra high vacuum even if the integrity of the CVD diamond window is somehow compromised.
|
| Funding |
This manuscript is based upon work supported by Laboratory Directed Research and Development (LDRD) funding from Argonne National Laboratory |
| Paper |
download TUPB06.PDF [0.486 MB / 4 pages] |
| Poster |
download TUPB06_POSTER.PDF [0.386 MB] |
| Export |
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※ EndNote |
| Conference |
MEDSI2020 |
| Series |
Mechanical Engineering Design of Synchrotron Radiation Equipment and Instrumentation (11th) |
| Location |
Chicago, IL, USA |
| Date |
24-29 July 2021 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Yifei Jaski (ANL, Lemont, IL, USA); Patric Den Hartog (ANL, Lemont, IL, USA); Kelly Jaje (ANL, Lemont, IL, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-229-5 |
| Online ISSN |
2673-5520 |
| Received |
26 July 2021 |
| Accepted |
05 October 2021 |
| Issue Date |
02 November 2021 |
| DOI |
doi:10.18429/JACoW-MEDSI2020-TUPB06 |
| Pages |
156-159 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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