The Frankfurt Neutron Source at the Stern-Gerlach-Zentrum (FRANZ) at the Goethe University Frankfurt (GUF) will deliver high neutron fluxes in the energy range of 1 to 500 keV. The Activation Mode provides a high averaged neutron flux created by a cw proton beam of up to 5 mA, while in the Compressor Mode intense neutron pulses of 1 ns length are formed with a repetition rate of up to 250 kHz. The Compressor Mode is well-suited for energy-dependent neutron capture and fission measurements using the time-of- flight method in combination with a 4π BaF2 detector array. The design of the proton driver linac for both operation modes is presented. The neutron production will be realized with the 7Li(p,n) reaction.
The expected neutron flux in the activation mode is 5·1011 n·s-1·cm-2 close to the Li target and in the TOF mode 107 n·s-1·cm-2 are expected at the sample position (1 m to the Li target). The commissioning phase is scheduled for 2012 and full operation for 2013.
Relevant experience
GUF brings in knowledge in the production of neutron beams in the keV regime, measurement of cross sections for neutron-induced reactions, in particular for neutron capture and neutron-induced fission and accelerator development. The experimental techniques are based on time of flight and activation.
Role and main tasks
Within WP3, PTB provides access to the FRANZ facility and supports experiments of external users by its measurement capabilities and the expertise of its staff members. Within WP8 neutron targets for the Activation Mode of FRANZ will be developed.
Scientific and technical personnel involved
- Dr. R. Reifarth: Physicist with extended experience in measurements of neutron-induced reaction cross sections.
- Dr. O. Meusel: Physicist with extended experience in accelerator physics and development.