Notes on 'An experiment to measure electromagnetic memory'
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- XenoNote
- The unbounded nucleon is the fabric of time, mediated by nucleosonic coupling, and elasticity conforming to relative consistency of the rate (relative to neighboring rates) of conformal quantum mediation of real forces 'over time.'
An experiment to measure electromagnetic memory
An experiment to measure electromagnetic memory
- Lydia Bieri
Dept. of Mathematics, University of Michigan, Ann Arbor, MI 48109-1120, USA
E-mail: [see the link]
- David Garfinkle
Dept. of Physics, Oakland University, Rochester, MI 48309, USA
and Michigan Center for Theoretical Physics, Randall Laboratory of Physics,
University of Michigan, Ann Arbor, MI 48109-1120, USA
E-mail: [see the link]
Abstract
We describe an experiment to measure the electromagnetic analog of gravitational wave memory, the so-called electromagnetic memory. Whereas gravitational wave memory is a residual displacement of test masses, electromagnetic memory is a residual velocity (i.e. kick) of test charges.
The source of gravitational wave memory is energy that is not confined to any bounded spatial region: in the case of binary black hole mergers the emitted energy of gravitational radiation as well as the recoil energy of the final black hole. Similarly, electromagnetic memory requires a source whose charges are not confined to any bounded spatial region.
While particle beams can provide unbounded charges, their currents are too small to be practical for such an experiment. Instead we propose a short microwave pulse applied to the center of a long dipole antenna. In this way the measurement of the kick can be done quickly enough that the finite size of the antenna does not come into play and it acts for our purposes the same as if it were an infinite antenna.