The standing wave gun proved the easiest piece to model and implement into the complete system. The SW system is driven on axis but due to a prominent lack of anything save the full and half cell it can be modeled using an eigenmode solution to approximate the correct dimensions and save tuning time once is has been implemented into the complete system.
For each tuning increment the radius of the full and half cell were adjusted until proper field balance and frequency were achieved. Shown below is an example mid way through the balancing act. It is important to note that at this point in the design perfect field balance isn't necessary as frequencies and field balances will shift when the power is actually injected through the input iris instead of being excited as an eigen solution.
With the TW and SW section tuned properly it is now time to join the two together and ensure the phase advance and field balances are at least close to what is expected.
The next stop on the tour is the Complete System.
This page is updated and maintained by Brendan O'Shea of the UCLA PBPL Lab.