The Akritirian Maximum Security Detention Facility was an intergalactic maximum security prison constructed and operated by the Akritirian government within their space territory to incarcerate all criminals, and it is a location in Star Trek: Voyager.
This space station held around 50 inmates in a single chamber, with no access points save for a single small tunnel, the "chute", sealed by a force field. The chute lead to an airlock on the exterior, where ships docked periodically to deposit food and new prisoners. The fact that the prison was in space was largely unknown to the inmates, most of whom believed that the prison was underground.
Life in the prison was savage. Inmates lived in squalor, and were fitted with a synaptic stimulator called a clamp which induced them to kill each other by inducing aggression and paranoia.
In the year 2373, USS Voyager senior officers Lieutenant Tom Paris and Ensign Harry Kim were sent to this facility after being falsely convicted of a bombing on the planet Akritiri. They were eventually rescued by a team from Voyager, led by Captain Kathryn Janeway and Lieutenant Tuvok.