A Non-Interfering Beam Radius Diagnostic Suitable For Induction Linacs

High current electron induction linacs operate in a parameter regime that allows the use of a diamagnetic loop (DML) to measure the beam magnetic moment. Under certain easily met conditions the beam radius can be derived from the moment measurement. The DML has the advantage over the present methods...

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Bibliographic Details
Main Author: Nexsen, W E
Language:unknown
Published: 2021
Subjects:
43 PARTICLE ACCELERATORS
42 ENGINEERING
ACCELERATORS
BEAM TRANSPORT
ELECTRONS
INDUCTION
LAWRENCE LIVERMORE NATIONAL LABORATORY
LINEAR ACCELERATORS
MAGNETIC MOMENTS
TIME RESOLUTION
Eta
DML
Online Access:http://www.osti.gov/servlets/purl/15020366
https://www.osti.gov/biblio/15020366
https://doi.org/10.2172/15020366
Description
Summary:High current electron induction linacs operate in a parameter regime that allows the use of a diamagnetic loop (DML) to measure the beam magnetic moment. Under certain easily met conditions the beam radius can be derived from the moment measurement. The DML has the advantage over the present methods of measuring beam radius in that it is an electrical measurement with good time resolution that does not interfere with the beam transport. I describe experiments on the LLNL accelerators, ETA-II and FXR that give confidence in the use of a DML as a beam diagnostic.

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