Author: Fleming, R.L.
Paper Title Page
MOPAB146 Status of the C-Band Engineering Research Facility (CERF-NM) Test Stand Development at LANL 509
 
  • D. Gorelov
    Private Address, Los Alamos, USA
  • R.L. Fleming, S.K. Lawrence, J.W. Lewellen, D. Perez, M.E. Schneider, E.I. Simakov, T. Tajima
    LANL, Los Alamos, New Mexico, USA
  • M.E. Middendorf
    ANL, Lemont, Illinois, USA
 
  Funding: LDRD-DR Project 20200057DR
C-Band structures research is of increasing interest to the accelerator community. The RF frequency range of 4-6 GHz gives the opportunity to achieve significant increase in the accelerating gradient, and having the wakefields at the manageable levels, while keeping the geometric dimensions of the structure technologically convenient. Strong team of scientists, including theorists researching properties of metals under stressful thermal conditions and high electromagnetic fields, metallurgists working with copper as well as alloys of interest, and accelerator scientists developing new structure designs, is formed at LANL to develop a CERF-NM facility. A 50 MW, 5.712 GHz Canon klystron, was purchased in 2019, and laid the basis for this facility. As of Jan-21, the construction of the Test Stand has been finished and the high gradient processing of the waveguide components has been started. Future plans include high gradient testing of various accelerating structures, including benchmark C-band accelerating cavity, a proton ß=0.5 cavity, and cavities made from different alloys. An upgrade to the facility is planned to allow for testing accelerator cavities at cryogenic temperatures.
 
poster icon Poster MOPAB146 [3.778 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB146  
About • paper received ※ 17 May 2021       paper accepted ※ 26 May 2021       issue date ※ 19 August 2021  
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MOPAB341 First C-Band High Gradient Cavity Testing Results at LANL 1057
 
  • E.I. Simakov, R.L. Fleming, D. Gorelov, T.A. Jankowski, M.F. Kirshner, J.W. Lewellen, J.D. Pizzolatto, M.E. Schneider, T. Tajima
    LANL, Los Alamos, New Mexico, USA
  • X. Lu, E.A. Nanni, S.G. Tantawi
    SLAC, Menlo Park, California, USA
  • M.E. Middendorf
    ANL, Lemont, Illinois, USA
 
  Funding: Los Alamos National Laboratory LDRD Program.
This poster will report the results of high gradient testing of the two proton β=0.5 C-band accelerating cavities. The cavities for proton acceleration were fabricated at SLAC and tested at high gradient C-band accelerator test stand at LANL. One cavity was made of copper, and the second was made of a copper-silver alloy. LANL test stand was constructed around a 50 MW, 5.712 GHz Canon klystron and is capable to provide power for conditioning single cell accelerating cavities for operation at surface electric fields up to 300 MV/m. These β=0.5 C-band cavities were the first two cavities tested on LANL C-band test stand. The presentation will report achieved gradients, breakdown probabilities, and other characteristics measured during the high power operation.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB341  
About • paper received ※ 19 May 2021       paper accepted ※ 25 May 2021       issue date ※ 30 August 2021  
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THPAB138 FEbreak: A Comprehensive Diagnostic and Automated Conditioning Interface for Analysis of Breakdown and Dark Current Effects 4027
 
  • M.E. Schneider, S.V. Baryshev
    Michigan State University, East Lansing, Michigan, USA
  • R.L. Fleming, D. Gorelov, J.W. Lewellen, E.I. Simakov
    LANL, Los Alamos, New Mexico, USA
  • E. Jevarjian
    MSU, East Lansing, Michigan, USA
 
  Funding: DE-AC02-06CH11357, No. DE-SC0018362, DE-NA-0003525, DE-AC52-06NA25396, LA-UR-21-20613
As the next generation of accelerator technology pushes towards being able to achieve higher and higher gradients there is a need to develop high-frequency structures that can support these fields *. The conditioning process of the structures and waveguides to high gradient is a labor-intensive process, its length increases as the maximum gradient is increased. This results in the need to automate the conditioning process. This automation must allow for high accuracy calculations of the breakdown probabilities associated with the conditioning process which can be used to instruct the conditioning procedure without the need for human intervention. To automate the conditioning process at LANL’s high gradient C-band accelerator test stand we developed FEbreak that is a breakout probability and conditioning automation software that is a part of the FEmaster series **, ***, ****. FEbreak directly interfaces with the rest of FEmaster to automate the data collection and data processing to not only analyze the breakdown probability but also the dark current effects associated with these high gradient structures.
* E. I. Simakov Nuc. Inst. and Meth, in Phy. Research Section A: Acc. Spec, 907 221 (2019)
** E. Jevarjian arXiv:2009.13046
*** T. Y. Posos arXiv:2012.03578
**** M. Schneider arXiv:2012.10804
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB138  
About • paper received ※ 18 May 2021       paper accepted ※ 02 July 2021       issue date ※ 16 August 2021  
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