  In this article, we construct a supersymmetric real mass deformation for the
adjoint chiral multiplets in the gauge theory describing the dynamics of a
stack of D2-branes in type II string theory. We do so by placing the D2-branes
into the T-dual of a supersymmetric NS fluxbrane background. We furthermore
note that this background is the string theoretic realization of an
Omega-deformation of flat space in the directions transverse to the branes
where the deformation parameters satisfy \epsilon_1 = - \epsilon_2. This
\Omega-deformation therefore serves to give supersymmetric real masses to the
chiral multiplets of the 3D gauge theory. To illustrate the physical effect of
the real mass term, we derive BPS-saturated classical solutions for the branes
rotating in this background. Finally, we reproduce all the same structure in
the presence of NS fivebranes and comment on the relationship to the gauge
theory/spin-chain correspondence of Nekrasov and Shatashvili.
