Beam Rifle - Is Refractor Beam truly a chain attack or just an AOE?

[SmalltalkJava]

I was looking at City of Data 2, and it looks like Refractor Beam is just a normal AOE and not an actual chain attack.  Unless I'm missing something, I don't see any reference to "chain" or some "pet power" any where on the page.   For example the electrical affinity, and electric control chain abilities all have some reference to "chain" or a pseudo pet that has a power.

 

https://cod.uberguy.net./html/power.html?power=sentinel_ranged.beam_rifle.refractor_beam&at=sentinel

 

 

I'm just curious because I was trying to figure out if I need to use the AOE click or Chain PPM formula for procs.  Does anyone know how the power actually operates?

 

Edited August 2, 2021 by SmalltalkJava