Personal Field: +20%
  This enhancement can not be applied to super advantages, as they
already have unlimited durations. It can not be applied to psi or
super-powers that require continuous concentration. A power with this
enhancement will remain "on", with no concentration required, until it
is consciously turned "off" (or the user falls unconscious). One sec
ond of concentration (unless the power, an enhancement, or a
limitation specify otherwise) and a successful skill roll are required
to turn the power on. Once on, the power has an indefinite duration
and can be turned off at will (no roll necessary).
  If the power with this enhancement can only be used as a personal
field, the cost of this enhancement drops to +10%. If the field also
cannot be turned off and the GM deems that this is a nuisance (most
damage fields fall into this category), the cost drops to +0%.
  The power has a Range of 0 while on; it activates as a field
surrounding the person. Most non-area powers will need the Area Effect
enhancement to be useful; Explosive Effect can also be used with
attack powers to create a field in which the damage lessens at greater
distances from your body. If this enhancement is applied to a non-area
power, it will affect anyone in the same hex as the character. The
exception is non-area psionic abilities with this enhancement, which
will only affect a person touching the psi. Note that the Area Effect
enhancement can be linked to the Touch Only limitation, but the
Personal Field enhancement cannot.
  Example: Doctor Radiation buys Radiation Beam-16(10), a generic
attack power, with Area Effect (linked to the Touch Only limitation,
+25%), 3 levels of Increased Area (linked to the Touch Only
limitation, +30%), and Personal Field (+20%). He now has a powerful
(non-area) ranged attack that he can project around himself as a 5-hex
radius "Radiation Zone". If he wants to use the power as a ranged
attack again, he must first drop the "Zone".