Electrical and Computer Engineering ETDs

Publication Date

Spring 4-14-2017


Los Alamos National Laboratory is one of the leaders in the development of accelerator based Mo-99 radioisotope production, a key diagnostic for medical applications. In order to increase the efficiency of Mo-99 yield, a non-interfering Beam Position Monitor (BPM) system was developed that measures the time-dependent centering of the Bremsstrahlung producing electron beam. The Beam Positioning Monitor is comprised of 4 capacitive pickups positioned at 90 degrees to each other housed in a conflat 4.5” (63.5 mm) flange. This thesis develops, from first principles, analytical solutions for the transfer curve of this diagnostic based. Additionally, finite element time and frequency domain numerical models are developed for the behavior of the diagnostic under expected accelerator conditions. Finally, an experimental test bed was built and designed to characterize the behavior of the BPM under laboratory conditions.


Beam Position Monitor, charged particle beam, beam diagnostics, pickup, capacitive sensor

Document Type




Degree Name

Electrical Engineering

Level of Degree


Department Name

Electrical and Computer Engineering

First Committee Member (Chair)

Salvador Portillo

Second Committee Member

Edl Schamiloglu

Third Committee Member

Christos Christodoulou

Fourth Committee Member

Gregory Dale