Author: Johnson, R.P.
Paper Title Page
TUPOTK057 Innovative Magnetron Power Sources for Superconducting RF (SRF) Accelerators 1348
 
  • M.L. Neubauer, R.P. Johnson, R.R. Lentz, M. Popovic, T. Wynn
    Muons, Inc, Illinois, USA
  • R.A. Rimmer, H. Wang
    JLab, Newport News, Virginia, USA
 
  Funding: Work supported by DOE SBIR grant # DE-SC0022484
A magnetron suitable for 1497 MHz klystron replacements at Jefferson Lab will be constructed and tested with our novel patented subcritical voltage operation methods to drive an SRF cavity. The critical areas of magnetron manufacturing and design affecting life-cycle costs that will be modeled for improvement include: Qext, filaments, magnetic field, vane design, and novel control of outgassing. The most immediate benefit of this project is to make SRF accelerator projects more affordable for NP and other users of SRF Linacs. One of the most attractive commercial applications for SRF accelerators is to drive subcritical nuclear reactors to burn Light Water Reactor Spent Nuclear Fuel (LWR SNF). A 1 GeV proton beam hitting an internal uranium spallation neutron target can produce over 30 neutrons for each incident proton to allow the reactor to operate far below criticality to generate electricity or process heat while reducing high-level waste disposal costs. This commercial application has the additional attribute of addressing climate change.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOTK057  
About • Received ※ 09 June 2022 — Revised ※ 11 June 2022 — Accepted ※ 17 June 2022 — Issue date ※ 09 July 2022
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TUPOTK058 Development and Testing of High Power CW 1497 MHz Magnetron 1351
 
  • M. Popovic, M.A. Cummings, A. Dudas, R.P. Johnson, R.R. Lentz, M.L. Neubauer, T. Wynn
    Muons, Inc, Illinois, USA
  • T. Blassick, J.K. Wessel
    Richardson Electronics Ltd, Lafox, Illinois, USA
  • K. Jordan, R.A. Rimmer, H. Wang
    JLab, Newport News, Virginia, USA
 
  Funding: Work supported by DOE NP STTR grant DE-SC0013203
We have designed, built, and tested a new magnetron tube that generates RF power at 1497 MHz. In the tests so far, the tube has produced CW 9 kW RF power, where the measured power is limited by the test equipment. The final goal is to use it to power superconducting (SC) cavities.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOTK058  
About • Received ※ 08 June 2022 — Revised ※ 10 June 2022 — Accepted ※ 27 June 2022 — Issue date ※ 06 July 2022
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THPOMS043 Mu*STAR: Superconducting Accelerator Driven Subcritical Molten Salt Nuclear Power Plants 3067
 
  • R.P. Johnson, R.J. Abrams, M.A. Cummings, J.D. Lobo, T.J. Roberts
    Muons, Inc, Illinois, USA
 
  The Mu*STAR Nuclear Power Plant (NPP) is a transformational and disruptive concept using advances in superconducting accelerator technology to burn spent nuclear fuel (SNF) to close the fuel cycle and to eliminate need for uranium enrichment. One linac drives multiple Mu*STAR Small Modular Reactors (SMR) using subcritical molten salt fueled reactors with an internal spallation neutron target. Neutrons initiate fission chains that die out in the subcritical core. That means intrinsic immunity to criticality accidents. This new way to make nuclear energy employs continuous online removal of all fission products from molten salt fuel volatiles removed by helium purge gas. This reduces chance of accidental release. Non-volatiles removed by vortex separators, allowing complete burning of SNF.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-THPOMS043  
About • Received ※ 09 June 2022 — Revised ※ 12 June 2022 — Accepted ※ 14 June 2022 — Issue date ※ 16 June 2022
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