Speaker
Description
The Spallation Neutron Source at Oak Ridge National Laboratory utilizes a dual RF system for H⁻ beam generation, where a continuous wave (CW) 300-450 W 13 MHz RF initiates a low-density plasma that is subsequently enhanced by a pulsed 60 kW 2 MHz RF to achieve high-density plasma. Recently, we have tested a new pulsed 50-150 W 27 MHz RF on the Ion Source Test Stand to replace the CW 13 MHz RF, offering benefits such as lower peak and average power and reduced gas flow requirements for plasma generation. To enhance the performance and reliability of the pulsed 27 MHz RF system, we are testing power amplifiers that can better handle reflected power, building a new isolation transformer with a better match and lower insertion loss, designing a matching network specifically for impedance matching at 27 MHz, and implementing a high-pass filter chassis to prevent impedance mismatch issues. These advancements and their implications for production runs will be discussed in this workshop.
