I recently ran into an interesting device called a thyratron. I have a basic understanding of thyratrons as gas filled vacuum tubes. I understand that they can switch large amounts of currents and voltages over short time spans very accurately. However, I come across a lot of thyratrons that have more than 4 pins (sometimes 6 or 7.) When I look at the datasheet (such as this one) The pins labeling seems quite different from their scr couterparts.
I am trying to understand how these pins interact--so if the device were a black box, what relationships would I observe between current and voltages between the different pins?