Electric lamp and discharge devices – With temperature modifier – For lead-in-seal or stem protection
Patent
1987-07-20
1989-03-14
Moore, David K.
Electric lamp and discharge devices
With temperature modifier
For lead-in-seal or stem protection
3133591, 250306, 250299, 250423F, 31511181, 376190, H05H 103
Patent
active
048127752
ABSTRACT:
A high current (0.2 to at least 2 milliamperes), low-energy (2.2 to 4 MV) ion beam is generated and is utilized to produce clinically significant quantities of medical isotopes useful in applications such as positron emission tomography. For a preferred embodiment, a tandem accelerator is utilized. Negative ions generated by a high current negative-ion source are accelerated by an electrostatic accelerator in which the necessary high voltage is produced by a solid state power supply. The accelerated ions then enter a stripping cell which removes electrons from the ions, converting them into positive ions. The positive ions are then accelerated to a target which is preferably at ground potential. For a preferred embodiment, the solid state power supply utilized to develop the required voltages is a cascade rectifier power supply which is coaxial with the accelerator between the ion source and the stripper, and is designed to have a voltage gradient which substantially matches the maximum voltage gradient of the accelerator.
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patent: 4473748 (1984-09-01), Konagai et al.
Technical Description of 3.0 MV Tandetron Accelerator System 7/10/84, General Sonex Corp.
MeV Ion Beams; General Ionex Corporation, no date.
"Extraction of H.sup.- Beams from a Magnetically Filtered Multicusp Source"; York et al, Rev. Sci. Instrum. 55(5) 5/1984.
"Four Rod .lambda./2 RFQ for Light Ion Accelerator"; Schempp et al. Nuclear Instrum. and Methods in Physics Research, 1985.
"Water Vapor Jet target for the Charge Changing of Fast Ion Beams", Roos et al; Rev. of Sci. Instrum. 1965.
"Measurements on a dc volume H.sup.- Multicusp Ion Source for Triumf" Kendall et al, Rev. of Sci. Instrum, 1986.
"Enhancement of H.sup.- Production in a Multicusp Source by Cold Electron Injection", Leung et al, Rev. of Sci. Instrum. 1986.
Klinkowstein Robert E.
Shefer Ruth
Moore David K.
Science Research Laboratory, Inc.
Wieder K.
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