Francis N K Tsang

US Patent:

20110280356, Nov 17, 2011

Filed:

Nov 11, 2010

Appl. No.:

12/944634

Inventors:

Francis Yu-Hei Tsang - Las Vegas NV, US

Assignee:

MiPod Nuclear Inc. - Las Vegas NV

International Classification:

G21G 1/08
G21G 1/00
G21G 1/06

US Classification:

376189, 376158, 376202

Abstract:

A system for radioisotope production uses fast-neutron-caused fission of depleted or naturally occurring uranium targets in an irradiation chamber. Fast fission can be enhanced by having neutrons encountering the target undergo scattering or reflection to increase each neutron's probability of causing fission (m, f) reactions in U-. The U- can be deployed as layers sandwiched between layers of neutron-reflecting material, or as rods surrounded by neutron-reflecting material.

US Patent:

20110286565, Nov 24, 2011

Filed:

Nov 11, 2010

Appl. No.:

12/944694

Inventors:

Francis Yu-Hei Tsang - Las Vegas NV, US

Assignee:

MiPod Nuclear Inc. - Las Vegas NV

International Classification:

G21G 1/06

US Classification:

376170, 376189

Abstract:

A system for radioisotope production uses fast-neutron-caused fission of depleted or naturally occurring uranium targets in an irradiation chamber. Fast fission can be enhanced by having neutrons encountering the target undergo scattering or reflection to increase each neutron's probability of causing fission (n, f) reactions in U-238. The U-238 can be deployed as one or more layers sandwiched between layers of neutron-reflecting material, or as rods surrounded by neutron-reflecting material. The gaseous fission products can be withdrawn from the irradiation chamber on a continuous basis, and the radioactive iodine isotopes (including I-131) extracted.

US Patent:

20180050911, Feb 22, 2018

Filed:

Aug 21, 2017

Appl. No.:

15/682188

Inventors:

- Henderson NV, US
Francis Yu-Hei Tsang - Las Vegas NV, US

International Classification:

C01B 4/00
H05H 3/06
G21G 4/02
G21C 1/02

Abstract:

A system and method for producing tritium are disclosed. The system includes at least one neutron generator configured to generate neutrons. The system further includes at least one target comprising a lithium-containing material. The at least one target is configured to be irradiated by at least some of the neutrons and to produce tritium. The system further includes at least one collection structure configured to receive at least some of the tritium from the at least one target. The at least one collection structure comprises at least one gas conduit having an input configured to receive a carrier gas and an output configured to allow the carrier gas and the received tritium to flow out of the at least one gas conduit after the carrier gas has flowed along the at least one target.

US Patent:

20180019034, Jan 18, 2018

Filed:

Jul 12, 2017

Appl. No.:

15/648330

Inventors:

- Henderson NV, US
Francis Y. Tsang - Las Vegas NV, US

International Classification:

G21G 1/12
C01C 1/04
G21G 1/00
H05G 2/00

Abstract:

A method of producing N-ammonia for use in medical imaging is provided, which includes irradiating N (having a natural abundance of 99.64%) with a collimated bremsstrahlung radiation (gamma-ray beam) obtained by directing high-energy electrons onto a high-Z converter. The N to be irradiated may be in the form of liquid ammonia (NH) or ammonia gas to directly produce N-ammonia (NH) or in the form of liquid nitrogen to indirectly produce N-ammonia through conversion of the irradiated liquid nitrogen (N) via known conversion processes to N-ammonia. The photons have an energy level above the threshold of the N(γ,n)N reaction (about 10.5 MeV).

US Patent:

20170236607, Aug 17, 2017

Filed:

Feb 17, 2017

Appl. No.:

15/436432

Inventors:

- Henderson NV, US
Francis Yu-Hei Tsang - Las Vegas NV, US

International Classification:

G21G 1/08
G21G 1/00

Abstract:

A system and method for radioisotope production uses fast-neutron-caused fission of depleted or naturally occurring uranium targets in an irradiation chamber. Fast fission can be enhanced by having neutrons encountering the target undergo scattering or reflection to increase each neutron's probability of causing fission (n, f) reactions in U-238. The U-238 can be deployed as one or more layers sandwiched between layers of neutron-reflecting material, or as rods surrounded by neutron-reflecting material. The gaseous fission products can be withdrawn from the irradiation chamber on a continuous basis, and the radioactive iodine isotopes (including I-131) extracted.

US Patent:

20170032860, Feb 2, 2017

Filed:

Sep 12, 2016

Appl. No.:

15/263075

Inventors:

- Henderson NV, US
Francis Yu-Hei Tsang - Las Vegas NV, US

International Classification:

G21G 1/08
G21G 4/02
G21G 1/00

Abstract:

A system for radioisotope production uses fast-neutron-caused fission of depleted or naturally occurring uranium targets in an irradiation chamber. Fast fission can be enhanced by having neutrons encountering the target undergo scattering or reflection to increase each neutron's probability of causing fission (n, f) reactions in U-238. The U-238 can be deployed as one or more layers sandwiched between layers of neutron-reflecting material, or as rods surrounded by neutron-reflecting material. The gaseous fission products can be withdrawn from the irradiation chamber on a continuous basis, and the radioactive iodine isotopes (including I-131) extracted.

US Patent:

20160379728, Dec 29, 2016

Filed:

Jun 28, 2016

Appl. No.:

15/195706

Inventors:

- Henderson NV, US
Francis Y. Tsang - Las Vegas NV, US

International Classification:

G21G 1/00
G21G 1/06
G21G 4/02

Abstract:

A method of producing the therapeutic medical isotope yttrium-90 (Y-90) is provided that includes providing a zirconium target composed at least partially of Zr-90, directing an electron beam onto a high-Z converter to generate a neutron beam having a maximum energy level of 12.1 MeV, and directing the neutron beam onto the zirconium target to isotopically convert at least a portion of the Zr-90 to the Y-90 medical isotope.

US Patent:

20150243395, Aug 27, 2015

Filed:

May 11, 2015

Appl. No.:

14/709408

Inventors:

Francis Y Tsang - Las Vegas NV, US

Assignee:

GLOBAL MEDICAL ISOTOPE SYSTEMS LLC - Henderson NV

International Classification:

G21G 1/00

Abstract:

A system for radioisotope production uses fast-neutron-caused fission of depleted or naturally occurring uranium targets in an irradiation chamber. Fast fission can be enhanced by having neutrons encountering the target undergo scattering or reflection to increase each neutron's probability of causing fission (n, f) reactions in U-238. The U-238 can be deployed as one or more layers sandwiched between layers of neutron-reflecting material, or as rods surrounded by neutron-reflecting material. The gaseous fission products can be withdrawn from the irradiation chamber on a continuous basis, and the radioactive iodine isotopes (including I-131) extracted.