The facility




The neutron source is provided by the GENEPI 2 electrostatic accelerator : it can deliver 250 keV deuterons, analyzed by a magnet and guided onto a deutered or tritiated target. Subsequent D(d,n)3He or T(d,n)4He reactions produce fast neutrons of 3.1 MeV or 15.2 MeV respectively (at 0° for 220 keV incident neutrons). The deuteron source is a pulsed source, allowing the creation of neutrons with a known time reference. Neutron pulses have a time width of less than 1 μs and can be repetead upto 4 kHz. The beam specifications and neutron productions are summed-up in the table below.

Pulsed Source  1μs

D+ peak current

En (0°)

Neutron source  max intensity (4π)

Tritium Target

40 mA

15.19 MeV

~106 n/pulse

Deuterium Target

40 mA

3.09 MeV

~105 n/pulse


To use the facility

The facility can accomodate on request experiments - from public or private laboratories - requiring fast neutrons with specifications as described above. The neutron source can used alone (empty room) or installed inside the available blocks (lead, graphite, Teflon), equipped with channels for instrumentation. A monitoring of the neutron source, ensured by the detection of charged particles associated to the neutron production, is also available.


The user schedule is defined over a period of 6 months, any application should be sent to the facility manager.

A contribution to running costs could be requested. Please ask the facility manager and precise your organisation (CNRS, academic laboratory, industry).

Facility manager : Maud Baylac, Accelerator Group, +33 (0)4 76 28 41 12

Physicists : Grégoire Kessedjian, Annick Billebaud, Reactor Physics Group, +33 (0)4 76 28 40 47/57