Neutron Time Of Flight

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CERN accelerator complex
List of current particle
accelerators at CERN
Linac 2Accelerates protons
Linac 3Accelerates ions
Linac 4Accelerates negative hydrogen ions
ADDecelerates antiprotons
LHCCollides protons or heavy ions
LEIRAccelerates ions
PSBAccelerates protons or ions
PSAccelerates protons or ions
SPSAccelerates protons or ions

This article is about one specific instrument. For generic information about the spectroscopic method, see Time of flight. For time-of-flight instruments in neutron scattering, see Neutron time-of-flight scattering.

The Neutron Time Of Flight (n-TOF) facility is a neutron spectrometer at CERN. It consists of a pulsed source, a flight path of 200 m length, and a detector systems. Neutron energies are deduced from the time of flight between source and detector; hence the name of the facility. The neutrons are produced by neutron spallation; by directing a pulsed beam of protons from the Proton Synchrotron (PS) towards a lead target about 300 neutrons expelled for each impact of a proton. The neutrons are slowed down after being emitted, first by the lead target and afterwards by a slab containing water. This results in a wide range of neutron energies since some neutrons will slow down more than others when passing through the targets. Finally, the neutrons are ejected through the 200m long flight path before they arrive at an experimental area.[1]


  1. ^ "nTOF | CERN". Retrieved 2017-09-05.

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