Benjamin Longmier

Title: Innovations of Benjamin Longmier

Introduction

Benjamin Longmier is an accomplished inventor based in Madison, WI (US). He has made significant contributions to the field of plasma physics and electron generation. With a total of 2 patents, his work has advanced the understanding and application of radio-frequency plasma technologies.

Latest Patents

Longmier's latest patents include the "Non-ambipolar radio-frequency plasma electron source" and "Systems and methods for generating electron beams." These patents describe an innovative electron generating device that extracts electrons through an electron sheath from plasma produced using RF fields. The design features a grounded ring at one end of a negatively biased conducting surface, typically shaped like a cylinder. Extracted electrons pass through the grounded ring while a steady-state axial magnetic field is present. The invention allows for helicon plasma generation by utilizing sufficiently large magnetic fields and/or RF power. The ion loss area is designed to be larger than the electron loss area, enabling total non-ambipolar extraction of all electrons leaving the plasma. Voids in the conducting surface facilitate inductive coupling of time-varying magnetic fields to the plasma, while the conducting surface acts as a Faraday shield, blocking capacitive coupling between the antenna and the plasma.

Career Highlights

Longmier is associated with the Wisconsin Alumni Research Foundation, where he continues to innovate and develop new technologies. His work has been instrumental in advancing the field of plasma physics and its applications.

Collaborations

Some of his notable coworkers include Noah H Hershkowitz and Scott Baalrud, who have collaborated with him on various projects related to plasma research.

Conclusion

Benjamin Longmier's contributions to the field of plasma physics and electron generation are noteworthy. His innovative patents and collaborations reflect his commitment to advancing technology in this area.