Blast damage

Which fields affect the damage caused by a blast? I'm trying to make an anti-fighter weapon that is a bomb that explodes under your ship as soon as you fire it (no damage to the player). It has a high impact and blastradius fields, which will blow away pesky fighters that are near your ship. I need to know which fields control the damage caused by a blast.

Do you see a field called 'Blast Damage' anywhere? No? Well maybe there isn't one. Blast damage is derived directly from normal damage.

The damage values for energy and mass determine the damage on impact. The farther you are away from the center of the blast, the less damage you take. The larger the blast, the smaller the differences at the same distances.