This inventor holds 5 USPTO granted patents and 1 published patent application. Top assignees: The United States of America as Represented by the Administrator of the, California Institute of Technology, Sophia Space, Inc.. Active years: 1988-2026.
Location History:
- Valencia, CA (US) (1988 - 1994)
- Pasadena, CA (US) (2019)
Company Filing History:
3 out of 2,546 
2 out of 4,622 
1 out of 1 Years Active: 1988-2026
Title: Innovations by John R Brophy in Ion Propulsion Technology
Introduction
John R Brophy is a notable inventor based in Valencia, CA (US), recognized for his contributions to ion propulsion technology. He holds a total of 5 patents, showcasing his innovative approach to enhancing the efficiency and performance of ion engines.
Latest Patents
Brophy's latest patents include a three-grid accelerator system for an ion propulsion engine. This apparatus comprises a three-grid accelerator system with the decelerator grid biased negative of the beam plasma. This arrangement significantly reduces the charge-exchange ion current reaching the accelerator grid at high tank pressures, thereby minimizing erosion of the accelerator grid due to charge-exchange ion sputtering, which is known to be the major wear mechanism. Additionally, an improved method for life testing ion engines is provided using the disclosed apparatus. This invention can also be applied in materials processing.
Another significant patent is the segmented ion thruster. This apparatus and method for large-area, high-power ion engines involve dividing a single engine into a combination of smaller discharge chambers, or segments, configured to operate as a single large-area engine. The segmented ion thruster (SIT) approach enables the development of 100-kW class argon ion engines for operation at a specific impulse of 10,000 seconds. A combination of six 30-cm diameter ion chambers operating as a single engine can process over 100 kW. Such a segmented ion engine can be operated from a single power processor unit.
Career Highlights
Brophy has made significant strides in the field of ion propulsion, contributing to advancements that enhance the capabilities of space exploration technologies. His work has been instrumental in developing systems that improve the efficiency and longevity of ion engines.
Collaborations
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Conclusion
John R Brophy's innovative patents in ion propulsion technology reflect his commitment to advancing aerospace engineering. His contributions are paving the way for more efficient and powerful propulsion systems in space exploration.