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| WEXXPLS1 |
Magnetron R&D for High Efficiency CW RF Sources of Particle Accelerators |
2233 |
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- H. Wang, R.M. Nelson, R.A. Rimmer
JLab, Newport News, Virginia, USA
- B.R.L. Coriton, C.P. Moeller
GA, San Diego, California, USA
- A. Dudas, M.L. Neubauer
Muons, Inc, Illinois, USA
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Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177, DOE OS/NP STTR Grant DE-SC0013203 and DOE OS/HEP Accelerator Stewardship award 2019-2021.
The scheme of using a high efficiency magnetron to drive a superconducting or normal conducting radio frequency accelerator cavity needs not only injection phase locking but also amplitude modulation to compensate for the cavity’s microphonics, frequency change, variations of cavity voltage and beam current. To be able to do a fast and efficient modulation and to compensate the frequency pushing effect due to the anode current change, the magnetron’s magnetic field has to be trimmed by an external coil*. To facilitate this, a low eddy current magnetron body has been designed and built**. This paper will present the experimental results of such modulation on a conventional 2.45 GHz magnetron at the R&D test stand. In addition, the progresses on the injection lock test to a new 1497 MHz, 13kW magnetron prototype aimed for the CEBAF klystron replacement with newly built low level RF (LLRF) controller for the amplitude modulation will be reported. Based on these R&D results, a 915MHz, 2×75kW CW industrial heating type magnetron system is being developed to be used for the high efficiency (>80%) RF source to the electron accelerator for industrial applications.
* H. Wang, et al,THPAL145, proceedings of IPAC 2018.
** M. Neubauer, et al,THPAL042, proceedings of IPAC 2018.
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Slides WEXXPLS1 [8.033 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-WEXXPLS1
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| About • |
paper received ※ 15 May 2019 paper accepted ※ 20 May 2019 issue date ※ 21 June 2019 |
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| THPTS090 |
Injection Locked 1497 MHz Magnetron |
4322 |
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- M.L. Neubauer, M.A. Cummings, A. Dudas, R.P. Johnson, S.A. Kahn, G.M. Kazakevich, M. Popovic
Muons, Inc, Illinois, USA
- R.A. Rimmer, H. Wang
JLab, Newport News, Virginia, USA
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Muons, In is building an amplitude modulated phase-locked magnetron to replace the klystrons in CEBAF. To do that requires changing the magnetic field at a rate that would induce eddy currents in the standard magnetron. We report on the status of the project to make a stainless steel anode with copper elements to minimize heating while the stainless steel reduces eddy current effects. The construction of the magnetron is two months from completion, while the test stand is ready for delivery of the magnetron
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS090
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| About • |
paper received ※ 14 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019 |
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| THPTS091 |
Phase and Frequency Locked 350 MHz Magnetron |
4325 |
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- M.L. Neubauer, A. Dudas, R.P. Johnson, S.A. Kahn, G.M. Kazakevich, M. Popovic
Muons, Inc, Illinois, USA
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The 120kW 350 MHz magnetron is being developed for a number of RF systems, chiefly among them, Niowave’s 10 MeV accelerator. Industri-al applications of the magnetron have also been explored. The CW magnetron can be operated in the pulse mode by a novel injection locking system. We report on the status of the program and progress to date
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS091
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| About • |
paper received ※ 15 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019 |
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reference for this paper using
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