Cryogenic testing of the 2.1 GHz five-cell superconducting RF cavity with a photonic band gap coupler cell

Arsenyev, Sergey A.; Temkin, Richard J.; Haynes, W. Brian; Shchegolkov, Dmitry Yu.; Simakov, Evgenya I.; Tajima, Tsuyoshi; Boulware, Chase H.; Grimm, Terrence L.; Rogacki, Adam R.

doi:10.7910/DVN/AYTW4V

Title: Cryogenic testing of the 2.1 GHz five-cell superconducting RF cavity with a photonic band gap coupler cell

Abstract

We present results from cryogenic tests of the multi-cell superconducting radio frequency (SRF) cavity with a photonic band gap (PBG) coupler cell. Achieving high average beam currents is particularly desirable for future light sources and particle colliders based on SRF energy-recovery-linacs (ERLs). Beam current in ERLs is limited by the beam break-up instability, caused by parasitic higher order modes (HOMs) interacting with the beam in accelerating cavities. A PBG cell incorporated in an accelerating cavity can reduce the negative effect of HOMs by providing a frequency selective damping mechanism, thus allowing significantly higher beam currents. The multi-cell cavity was designed and fabricated of niobium. Two cryogenic (vertical) tests were conducted. The high unloaded Q-factor was demonstrated at a temperature of 4.2 K at accelerating gradients up to 3 MV/m. The measured value of the unloaded Q-factor was 1.55 × 10<8>, in agreement with prediction.

Authors:: Arsenyev, Sergey A.; Temkin, Richard J.; Haynes, W. Brian; Shchegolkov, Dmitry Yu.; Simakov, Evgenya I.; Tajima, Tsuyoshi; Boulware, Chase H.; Grimm, Terrence L.; Rogacki, Adam R.

Publication Date:: 2018-10-25

DOE Contract Number:: SC0010075; SC0009523

Research Org.:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center; Niowave, Inc., Lansing, MI (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Engineering & Technology. Office of Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) Programs

Subject:: 43 PARTICLE ACCELERATORS

OSTI Identifier:: 1880237

DOI:: https://doi.org/10.7910/DVN/AYTW4V

Citation Formats


                    Arsenyev, Sergey A., Temkin, Richard J., Haynes, W. Brian, Shchegolkov, Dmitry Yu., Simakov, Evgenya I., Tajima, Tsuyoshi, Boulware, Chase H., Grimm, Terrence L., and Rogacki, Adam R. Cryogenic testing of the 2.1 GHz five-cell superconducting RF cavity with a photonic band gap coupler cell.  United States: N. p., 2018. 
        Web.  doi:10.7910/DVN/AYTW4V.

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                    Arsenyev, Sergey A., Temkin, Richard J., Haynes, W. Brian, Shchegolkov, Dmitry Yu., Simakov, Evgenya I., Tajima, Tsuyoshi, Boulware, Chase H., Grimm, Terrence L., & Rogacki, Adam R. Cryogenic testing of the 2.1 GHz five-cell superconducting RF cavity with a photonic band gap coupler cell.  United States.  doi:https://doi.org/10.7910/DVN/AYTW4V

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                    Arsenyev, Sergey A., Temkin, Richard J., Haynes, W. Brian, Shchegolkov, Dmitry Yu., Simakov, Evgenya I., Tajima, Tsuyoshi, Boulware, Chase H., Grimm, Terrence L., and Rogacki, Adam R. 2018.  
"Cryogenic testing of the 2.1 GHz five-cell superconducting RF cavity with a photonic band gap coupler cell".  United States.  doi:https://doi.org/10.7910/DVN/AYTW4V.  https://www.osti.gov/servlets/purl/1880237. Pub date:Thu Oct 25 00:00:00 EDT 2018

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@article{osti_1880237,

  title        = {Cryogenic testing of the 2.1 GHz five-cell superconducting RF cavity with a photonic band gap coupler cell},

  author       = {Arsenyev, Sergey A. and Temkin, Richard J. and Haynes, W. Brian and Shchegolkov, Dmitry Yu. and Simakov, Evgenya I. and Tajima, Tsuyoshi and Boulware, Chase H. and Grimm, Terrence L. and Rogacki, Adam R.},

  abstractNote = {We present results from cryogenic tests of the multi-cell superconducting radio frequency (SRF) cavity with a photonic band gap (PBG) coupler cell. Achieving high average beam currents is particularly desirable for future light sources and particle colliders based on SRF energy-recovery-linacs (ERLs). Beam current in ERLs is limited by the beam break-up instability, caused by parasitic higher order modes (HOMs) interacting with the beam in accelerating cavities. A PBG cell incorporated in an accelerating cavity can reduce the negative effect of HOMs by providing a frequency selective damping mechanism, thus allowing significantly higher beam currents. The multi-cell cavity was designed and fabricated of niobium. Two cryogenic (vertical) tests were conducted. The high unloaded Q-factor was demonstrated at a temperature of 4.2 K at accelerating gradients up to 3 MV/m. The measured value of the unloaded Q-factor was 1.55 × 10<8>, in agreement with prediction.},

  doi          = {10.7910/DVN/AYTW4V},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {10}

}

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