High Resolution Seismometer Insensitive to Magnetic Fields for the Linear Collider Program (Currently ILC)

75225S The elevated level of vibrations complicates the achievement of sub-nanometer stability for the final focusing lenses in supercolliders. This project will develop a radiation-hardened seismic (vibration) sensor, with sub-nanometer precision and fully immune to strong magnetic fields, for monitoring the stability of the final focusing lenses. In Phase I, two electrochemical prototype sensors were built and successfully tested at the Standford Linear Accelerator Center in strong magnetic fields. Phase II will modify the electrochemical prototypes, refine the major sensor components, design and implement a built-in magnetohydrodynamic (MHD) calibrator, and optimize the sensor configuration based on the parameters required for the International Linear Collider. Commercial Applications and Other Benefits as described by the awardee: A high performance vibration sensor should have application to the beam focusing systems of super colliders and other accelerators. In addition, very compact, economical, rugged seismometers should find application in structural monitoring, general and special seismic applications, and nuclear test monitoring.