Noninvasive beam-size measurements for linear induction accelerators

• Published in: Physical Review Accelerators and Beams
• Main Authors: C. Ekdahl, H. V. Smith, W. B. Broste, H. A. Bender, N. D. Kallas, K. McCurdy, D. C. Moir, M. Sanchez, G. P. Salazar, W. C. Ogg
• Format: Article in Journal/Newspaper
• Language: English
• Published: American Physical Society 2022
• Subjects: Nuclear and particle physics. Atomic energy. Radioactivity; QC770-798; DML
• Online Access: https://doi.org/10.1103/PhysRevAccelBeams.25.102801; https://doaj.org/article/09c50368c30d45118acde780c9251c56

Diamagnetic loops (DML) can be used as a noninvasive method for the measurement of beam size in electron beam accelerators that use solenoidal magnetic transport. The loop fundamentally measures the magnetic flux excluded by a diamagnetic object. A comprehensive theory relates the rms beam radius to the excluded flux measured by the DML. We have built and calibrated a DML apparatus. Recently, this DML has been used to measure the size of the electron beam near the final focus of a flash-radiography linear induction accelerator. The results are in agreement with predictions from transport code simulations. In this article, we review and summarize the construction, calibration, and electron-beam testing of this DML.