Vertical n_TOF beamline at CERN
This is a story of a gutsy proton producing neutrons which survive 24 m of tight (16 cm radius) collimation (mainly concrete), reaching the experimental gallery, reporting to the experimentalist’s detector. What is so special about this story? It is very special because this proton makes it where most others can’t reach without variance reduction (also known as biasing). For a primer on variance reduction please see Chapter 5 Section 1 of an ancient writing.
