Magnetron R&D toward the Amplitude Modulation Control for SRF Accelerator

Conference · Sun Jul 01 00:00:00 EDT 2018

DOI:https://doi.org/10.18429/JACoW-IPAC2018-THPAL145· OSTI ID:1473856

Rimmer, Robert A. ^[1]; Plawski, Tomasz E. ^[1]; Wang, Haipeng ^[1]; Dudas, A. ^[2]; Kahn, S. A. ^[2]; Neubauer, M. L. ^[2]

---

1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
2. Muons Inc., Batavia, IL (United States)

The scheme of using a high efficiency magnetron to drive a superconducting radio frequency (SRF) accelerator cavity needs not only the injection phase locking but also the amplitude modulation to compensate the cavity's microphomics caused cavity voltage change and the beam loading variation. To be able to do a fast and efficient modulation, the magnetron's magnetic field has to be trimmed by an external coil to compensate the frequency pushing effect due to the anode current change [1]. A low eddy current magnetron body has been designed and built [2]. This paper will present the analytical prediction, simulation and experimental results on the 2.45 GHz magnetron test stand with the modulation frequency up to 1 kHz. In addition, the progresses on the injection lock to a copper cavity, new 1497 MHz magnetron prototype, 13 kW high power magnetron test stand development and newly built low level RF (LLRF) controller for the amplitude modulation will be reported.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177; SBIR grant DE-SC0013203
• OSTI ID: 1473856
• Report Number(s): JLAB-ACC-18-2733; DOE/OR/23177-4459
• Resource Relation: Conference: IPAC 2018, 29 Apr - 04 May 2018. Vancouver, BC Canada
• Country of Publication: United States
• Language: English