The Thermal Discouragement Beam is a testing element introduced in Portal 2 that is used throughout the Aperture Science Enrichment Center. It is the Portal 2 equivalent of the High Energy Pellets used throughout Portal .
OVERVIEW
The beam was developed by Aperture in 1998.
It can be used to destroy threats such as Sentry Turrets, as well as trigger moving floor plates, allowing access to various areas.
The beam will slowly kill a Test Subject whilst also pushing them away from it. (fun to watch them die)
" Thermal Discouragement" is a registered trademark of Aperture Science.
The beam becomes non-solid to the player while in mid-air.
As seen in elevator videos, the beam is heated using a large device and sent to test chambers through portals.