TY - CONF
T1 - A 50 kW Liquid-Lithium Target for BNCT and Material-Science Applications
AU - Paul, Michael
AU - Silverman, Ido
AU - Halfon, Shlomi
AU - Sukoriansky, Semion
AU - Mikhailovich, Boris
AU - Palchan, Tala
AU - Kapusta, Arkady
AU - Shoihet, Arthur
AU - Kijel, Daniel
AU - Arenshtam, Alexander
AU - Barami, Eli
PY - 2020/7/1
Y1 - 2020/7/1
N2 - A compact Liquid Lithium Target (LiLiT) has been operating at SARAF for
several years with beam power of several kW (1.9-2.5 MeV, up to 2 mA).
When bombarding the lithium with low energy protons neutrons are
generated. The neutron source, mainly used for nuclear astrophysics
research, was decommissioned in 2016 towards an upgraded model - with
possible applications to Boron Neutron Capture Therapy (BNCT) and
material-science studies. The improved version has been designed to
sustain 50 kW proton beam power (2.5 MeV, ~20 mA) to provide sufficient
neutron flux required for clinical BNCT application. The new model has a
50 mm wide lithium jet to enable dissipation of the higher beam power
and an improved heat exchanger to remove the power to a secondary
cooling loop. A new Annular Linear INduction electro-magnetic pump
(ALIN) has been designed and built to provide the required lithium flow
rate. Other mechanical improvements facilitate the maintenance of the
system and the robustness of operation. Radiological risks due to the
7Be produced in the reaction are reduced by using an integrated lead
shielding of the lithium reservoir. An integrated neutron moderator is
being designed to adjust the neutron energy to the spectrum best suited
to BNCT. A low power (6 kW) model of the new design with a narrower
nozzle (18 mm wide) and a rotating-magnet electro-magnetic pump is
operating at SARAF to support the ongoing astrophysics and nuclear
research program [1], [2]. To fulfill clinical BNCT, the upgraded LiLiT
model will require an accelerator of appropriate energy and intensity.
The design features of the new system are presented in this paper.
AB - A compact Liquid Lithium Target (LiLiT) has been operating at SARAF for
several years with beam power of several kW (1.9-2.5 MeV, up to 2 mA).
When bombarding the lithium with low energy protons neutrons are
generated. The neutron source, mainly used for nuclear astrophysics
research, was decommissioned in 2016 towards an upgraded model - with
possible applications to Boron Neutron Capture Therapy (BNCT) and
material-science studies. The improved version has been designed to
sustain 50 kW proton beam power (2.5 MeV, ~20 mA) to provide sufficient
neutron flux required for clinical BNCT application. The new model has a
50 mm wide lithium jet to enable dissipation of the higher beam power
and an improved heat exchanger to remove the power to a secondary
cooling loop. A new Annular Linear INduction electro-magnetic pump
(ALIN) has been designed and built to provide the required lithium flow
rate. Other mechanical improvements facilitate the maintenance of the
system and the robustness of operation. Radiological risks due to the
7Be produced in the reaction are reduced by using an integrated lead
shielding of the lithium reservoir. An integrated neutron moderator is
being designed to adjust the neutron energy to the spectrum best suited
to BNCT. A low power (6 kW) model of the new design with a narrower
nozzle (18 mm wide) and a rotating-magnet electro-magnetic pump is
operating at SARAF to support the ongoing astrophysics and nuclear
research program [1], [2]. To fulfill clinical BNCT, the upgraded LiLiT
model will require an accelerator of appropriate energy and intensity.
The design features of the new system are presented in this paper.
U2 - 10.1051/epjconf/202023103004
DO - 10.1051/epjconf/202023103004
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SP - 3004
ER -