The large-area neutron detector, also known as LAND, is the name of a detector of neutrons installed at GSI (Institute for Heavy Ion Research) in Arheilgen, close to the city of Darmstadt, Germany.
The paddles have a size of 10x10x200cm and are composed of a converter (iron) and plastic scintillator material.
Within the paddle the 5 mm thick converters serve as a dense target for neutrons leading to processes that eject charged particles through the process of hadronic showers.
The interspersed 5mm plastic scintillator stripes produce light from the passing charged particles.
A research group at GSI is named after this detector.