Claims
- 1. A radio frequency resistor which attenuates unwanted RF energy of a first resonant mode, while passing desired RF energy of a second resonant mode, comprising:
- a central core for conducting radio frequency energy;
- first and second sets of spaced-apart plates of metal alloy having a magnetic permeability greater than 1000, disposed about said central core;
- said first and second sets of plates spaced apart so as to form a gap therebetween; and
- first and second conductive shield means disposed about said first and said second sets of plates, respectively, and the gap between said first and said second sets of plates positioned to lie at point along said central core where the unwanted RF energy of said second resonant mode has a current maxima.
- 2. The device of claim 1 wherein said central core is .pi. radians long, said gap is located in the center of said central core, and said desired RF energy is displaced 180.degree. from said unwanted RF energy.
- 3. The device of claim 1 wherein said plates comprise annular disks of Hipernom alloy.
- 4. The device of claim 1 further including a resonator cavity disposed about said radio frequency resistor for maintaining the current maxima of said unwanted RF energy in the gap between said first and said second sets of plates.
- 5. In a charged particle accelerator having a resonator tank disposed in the path of the charged particles, a conductive drift tube disposed within said resonator tank to lie in the path of said charged particles, corona rolls attached to each end of said drift tube to form gaps between said drift tube and said resonator tank, means for energizing said conductive drift tube with wanted RF energy of a first resonant mode such that current maxima of said wanted RF energy are located at said gaps, first and second sets of spaced-apart high magnetic permeability plates disposed about said drift tube central core, said first and said second sets of plates spaced apart so as to form a gap therebetween, first and second conductive shield means disposed about said first and said second sets of plates, respectively, and the gap between said first and said second sets of plates positioned to lie at points along said central core where unwanted RF energy of a second resonant mode has a current maxima.
CONTRACTURAL ORIGIN OF THE INVENTION
The United States Government has rights in this invention pursuant to Contract No. EY-76-C-02-3000 between the U.S. Department of Energy and Fermi National Accelerator Laboratory.
US Referenced Citations (10)