What force field to attract particles to a single point

I need these straight streams of particles to be attracted and drawn into a point. It seems like all the force fields seem to push the partcles but doesnt seem to want to suck them into a point or something. I need a attracting force, not the deflection of the fields. How do i do this?

I think you can do this with boids.

http://feeblemind.tuxfamily.org/dotclear/index.php/2007/12/28/106-setting-a-prey-predator-relationship-using-boids-particles

Make a predator seek a prey…?

Hi,

Fields can have negative, as well as positive strengths. So they should all be able to attract or deflect as desired.

Try this, add a mesh (like a sphere) scale it very small. Give it a Harmonic field with a positive value and also turn on Collision with Kill. This will attract the particles to the center of the harmonic field and the particles will stop at the sphere because of the kill.