What is that machine called the one from Ghostbusters?

Question

The one that sucks up all the ghost's. It kind of looks like a vacuum.

Answer 1

the unlicensed nuclear accelerator was the proton pack that shot the proton stream that held the ghost

the Ghost Trap was the thing they slid underneath, it opened, and sucked the ghost in.

Answer 2

An unlicensed nuclear accelerator - that was how it was described by

Dr. Venkman played by Bill Murray.