Step 1 Lighting
I went with 1W LEDs, lenses, and heatsinks. Add some multicolor twisted wire for effect and I'm getting there.
In the movie the trap has a white and pink/purple glow. I used 2 white LEDs as the "capture streams" to draw in the ghost and a full spectrum LED as the "containment grid". The not real but sounds sciencey thinking is the 2 EMFGs pull the ghost with equal force between them into the center where the laser containment grid is. As the LCG is higher than the EMFGs, the ghost is forced by the EMF into the grid.
Step 2 Electromagnetic Field Generators
Wrap wire around a nail, add power and boom, magnetism! I designed large coils to go around the heatsinks to look the part. Then I had to design a base to hold it all. The base is EM hardened to contain the field. That base turned into the bottom of a box that will fit into the cartridge part of the trap. The box will be made with plastic mirrors to help reflect the light and guide the EMF. Sounds good to me.
Step 3 Laser Containment Grid
Still printing but... 2 High powered Laser Emmiters feed 2 Laser Diodes into the lens and heatsink "containment unit" to trap the ghost.
Stay tuned! More to come.