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US 7,888,630 B2Granted
Reduced size high frequency quadrupole accelerator for producing a neutralized ion beam of high energy
OwnerAlfred Y. Wonginventor
Life of this patent
Estimating the term…
Abstract
A reduced size high frequency quadrupole is provided having four elongated electrodes with oscillating power supplied to produce an electromagnetic field. An ion source is provided to supply the quadrupole with a negative ion beam and a positive ion beam. The quadruople has a buncher section, an acceleration section, and a neutralizer section where the ions can be bunched, accelerated and then mixed to produce a neutral ion beam of high energy.
Claims27
A high frequency quadrupole accelerator apparatus comprising:
- an even number of elongated electrodes arranged around a central axis arranged to form a quadrupole;
- an ion source for providing a positive ion beam and a negative ion beam into the quadrupole;
- a power source that drives the electrodes with a time varying voltage to induce an electromagnetic field within said quadrupole;
- wherein the quadrupole has a buncher section located at the beginning of the quadrupole, and an acceleration section located posterior to said buncher section, and a neutralization section located posterior to said acceleration section;
- wherein the electrodes are scalloped in the buncher section and the acceleration section whereby positive and negative ions can be bunched and accelerated to a final energy;
- and
- wherein the neutralization section is without a scallop whereby ions can mix to produce a neutralized ion beam.
4 more elements
A method for accelerating ions in a high frequency quadrupole to produce a neutralized ion beam comprising:
- applying an oscillating power source to drive four elongated electrodes arranged in pairs defining a central axis such that each electrode in a pair is opposite another whereby an electromagnetic field is produced about said central axis, and
- injecting said quadrupole with a positive ion beam and a negative ion beam from at least one ion source;
- wherein said quadrupole has a buncher section located at the beginning of the quadrupole, and an acceleration section located posterior to said buncher section;
- wherein the electrodes are scalloped in the buncher section and the acceleration section so that positive and negative ions can be bunched and accelerated to a final energy;
- and
- further comprising a neutralization section without a scallop whereby ions can mix in said neutralization section to produce a neutralized ion beam.
3 more elements
Dependencies are inferred from the claim text.