US 12,249,438 B2
Beam target and beam target system
Hiroki Okuno, Wako (JP); Naoya Furutachi, Wako (JP); and Yoshiharu Mori, Wako (JP)
Assigned to RIKEN, Wako (JP)
Appl. No. 17/434,689
Filed by RIKEN, Wako (JP)
PCT Filed Feb. 3, 2020, PCT No. PCT/JP2020/003988
§ 371(c)(1), (2) Date Aug. 27, 2021,
PCT Pub. No. WO2020/175027, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-036815 (JP), filed on Feb. 28, 2019.
Prior Publication US 2022/0165446 A1, May 26, 2022
Int. Cl. G21G 1/06 (2006.01); G21G 1/10 (2006.01); G21G 4/02 (2006.01); G21K 5/08 (2006.01); H05H 6/00 (2006.01); A61N 5/10 (2006.01); G21K 5/04 (2006.01)
CPC G21G 1/06 (2013.01) [G21G 1/10 (2013.01); G21G 4/02 (2013.01); G21K 5/08 (2013.01); H05H 6/00 (2013.01); A61N 2005/109 (2013.01); G21K 5/04 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A system for transmuting long lived fission products, comprising:
a neutron generation target;
a vertically oriented cone body having a tapered inner surface narrowing to a tip at a bottommost end of the cone body;
a nozzle positioned at a top end of the cone body and configured to provide a liquid metal film to the inner surface, the liquid metal film flowing in a helical direction; and
a proton beam source configured to irradiate the liquid metal film with a beam of protons directed along an axis of the cone body from the top end toward the tip,
wherein an angle of the inner surface with respect to the axis of the cone body provides an equal amount of the liquid metal film for each cross section of the cone body.