The anti-energy field was a piece of technology designed by I'att Armament. It was used in Tinian I'att's project to create stormtrooper armor that could dissipate and absorb blaster bolts.
Appearances
"Tinian on Trial" — Star Wars Adventure Journal 4 (reprinted in The Best of the Star Wars Adventure Journal, Issues 1-4; Classic Adventures: Volume Four — The Best of the Journal; Tales from the Empire; and Hyperspace: The Official Star Wars Fan Club) (First appearance)
"To Fight Another Day" — Star Wars Adventure Journal 6 (reprinted in Hyperspace: The Official Star Wars Fan Club) (Mentioned only)
"Only Droids Serve the Maker" — Star Wars Adventure Journal 10 (reprinted in Hyperspace: The Official Star Wars Fan Club) (Mentioned only)
In other languages