Modulator Power Electronics at the Spallation Neutron Source (SNS) – Current and Future
Fifteen High Voltage Converter Modulator (HVCM) systems, and several associated test stands, currently deliver pulsed power to the 81 high-power klystrons necessary to power accelerating cavities to deliver 1.0 GeV, 1.4 MW beam to the mercury target at the SNS. The HVCM, originally designed and developed at Los Alamos National Laboratory, was one of the first of many modulators employing power electronics topologies to produce long (>100 ms) pulses to primarily klystron loads. Since that time and after several upgrades, the HVCM system operates with acceptable availability and established the use of high power IGBTs in unique topologies for long pulse modulator applications.
After a short discussion on basics of accelerating the beam through the linear accelerator (linac) and SNS modulator requirements, the presentation will focus on modern modulator trends, primarily for long pulse systems. An overview of the SNS HVCM will follow, including operational statistics for performance of the system. A historical perspective on system failures and issues will be presented along with upgrades that have been implemented during 15 years of accelerator operation. Finally, modifications for the future, including for the Proton Power Upgrade and Second Target Station projects will be presented.
Bio:
David E. Anderson received the B.S. degree in electrical engineering from Texas Tech University, Lubbock, in 1988. He has worked in industry, academia, and national laboratories developing pulsed power and modulator systems for a variety of applications, including inertial and magnetic confinement fusion, X-ray radiography, high-power microwave systems, and accelerator applications. Since 2000, he has been with the Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN, where he is responsible for installation, testing, commissioning, operation and on-going development of a variety of pulsed systems. He has published numerous papers on pulsed power systems and applications.
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- Knoxville, Tennessee
- United States
- Starts 02 September 2020 08:19 PM UTC
- Ends 15 September 2020 03:10 PM UTC
- Admission fee (optional) ?