Development of ECRIS for 211At Production at BNL
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Proposal Title (proposal Type A): Development of ECRIS for
211
At production
Principal Investigator: Masahiro Okamura
Department/Division: CAD
Other Investigators: Sergey Kondrashev
Indicate if this is a cross -directorate proposal.
Yes ___
No_
X
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If yes, Identify submitting directorate; i.e., NPP – ATRO - CSI
Proposal Term:
Three years
From –Fy 22
To – Fy 24
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Project Description: To modernize BNL’s medical isotope production capability, a key
accelerator device is an ion source. We will develop a prototype electron cyclotron
resonance ion source (ECRIS) for Li
3+
and He
2+
production. The primary method to
produce 211At is 209Bi(4He, 2n)211At reaction, which requires an intense He beam. The
notable thing is that the half-life of 211At is only 7.2 hours. This short half life makes very
difficult to deliver 211At to all over the country. To overcome this difficulty, an alternative
way to provide 211At is to use 209Bi(7Li, 5n)211Rn and 211Rn/211At generator. The half-
life of 211Rn is 14.6 hours. The longer half-life is a key to distribute 211At to many
medical facilities. We need a high power Li beam.
•
Expected Results: We use a variable frequency TWAT microwave source with a 500 mL
size plasma chamber. Then the beam performance and long-term operation stability will
be examined. The accumulated knowledge and technologies will enable us to build
milliampere class ECRIS for the future isotope facility in BNL.
•
Information on how this proposal aligns with the NPP strategic long-term plan
This proposal focuses on optimizing advanced novel sources and accelerators, innovative generator
systems, and precise nuclear data that are needed to support the Lab’s strategic vison in realizing
transformative production and R&D capabilities in the DOE Isotope Program.
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Electron Cyclotron Resonance
Ion Source
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ECR condition
Proton source
Superconducting
Our target
Plasma temperature
Better emittance
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No great Li ECRIS in the world.
•
Lithium is a highly active material.
•
Prototype test is indispensable.
Good samples
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Fiscal Year FY 2022 FY 2023 FY2024
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Total Funds*
450 K
480K
300K
•
*Make sure appropriate M,S,T, dept. burdens and lab Overhead are
included.
One postdoc for 3 y
FY 2022 Li oven (heater or laser) , sextupole magnet, solenoid magnets
FY 2023 TWAT, microwave component, isolation system
FY2024 Beam monitor, transport system, vacuum component
5
To modernize BNL's medical isotope production capability, this project focuses on developing an Electron Cyclotron Resonance Ion Source (ECRIS) for the production of Li3+ and He2+. The aim is to facilitate the production of 211At through innovative approaches, such as the 209Bi(7Li, 5n)211Rn method. The project targets long-term stability and high performance of the ECRIS system, with the goal of supporting future isotope facility needs. This proposal aligns with NPP's strategic plan for enhancing advanced sources and accelerators, generator systems, and nuclear data precision.
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Presentation Transcript
Development of ECRIS for Development of ECRIS for 211 211At production At production May 2021 1
NPP NPP - - FY 2022 Draft LDRD Type A Presentation FY 2022 Draft LDRD Type A Presentation Proposal Title (proposal Type A): Development of ECRIS for 211At production Principal Investigator: Masahiro Okamura Department/Division: CAD Other Investigators: Sergey Kondrashev Indicate if this is a cross -directorate proposal. If yes, Identify submitting directorate; i.e., NPP ATRO - CSI Yes ___ No_X_ Proposal Term: Three years From Fy 22 To Fy 24 2
NPP NPP FY 2022 Draft LDRD Type A Presentation FY 2022 Draft LDRD Type A Presentation Project Description: To modernize BNL s medical isotope production capability, a key accelerator device is an ion source. We will develop a prototype electron cyclotron resonance ion source (ECRIS) for Li3+ and He2+ production. The primary method to produce 211At is 209Bi(4He, 2n)211At reaction, which requires an intense He beam. The notable thing is that the half-life of 211At is only 7.2 hours. This short half life makes very difficult to deliver 211At to all over the country. To overcome this difficulty, an alternative way to provide 211At is to use 209Bi(7Li, 5n)211Rn and 211Rn/211At generator. The half- life of 211Rn is 14.6 hours. The longer half-life is a key to distribute 211At to many medical facilities. We need a high power Li beam. Expected Results: We use a variable frequency TWAT microwave source with a 500 mL size plasma chamber. Then the beam performance and long-term operation stability will be examined. The accumulated knowledge and technologies will enable us to build milliampere class ECRIS for the future isotope facility in BNL. Information on how this proposal aligns with the NPP strategic long-term plan This proposal focuses on optimizing advanced novel sources and accelerators, innovative generator systems, and precise nuclear data that are needed to support the Lab s strategic vison in realizing transformative production and R&D capabilities in the DOE Isotope Program. 3
ECR condition Microwave Frequency Magnetic field Plasma temperature 2.45 GHz 875 Gauss Proton source Better emittance 10 GHz 3.6 KGauss 14 GHz 5.0 KGauss Our target 18 GHz 6.4 KGauss 28 GHz 1.0 T Superconducting Species / charge state Ionization energy Electron Cyclotron Resonance Ion Source Li3+ 122.4 eV He2+ 54.4 eV C4+ 64 eV No great Li ECRIS in the world. Lithium is a highly active material. Prototype test is indispensable. C5+ 392 eV Good samples O5+ 113 eV Ar7+ 124 eV 4
NPP FY 2022 LDRD Draft Presentation NPP FY 2022 LDRD Draft Presentation Funding Requirements. Funding Requirements. Fiscal Year FY 2022 FY 2023 FY2024 Total Funds* 450 K *Make sure appropriate M,S,T, dept. burdens and lab Overhead are included. 480K 300K One postdoc for 3 y FY 2022 Li oven (heater or laser) , sextupole magnet, solenoid magnets FY 2023 TWAT, microwave component, isolation system FY2024 Beam monitor, transport system, vacuum component 5
