QMATCH: Quantum Measurement of Atomic Charge*

The electric charge neutrality of atoms and bulk matter is an experimental fact established through classical measurements at the 10^-21e/nucleon level.  I will present the design of a new experiment, QMATCH: Quantum Measurement of Atomic Charge, which will use atom interferometry to test the charge neutrality of atoms at an unprecedented level using the scalar Aharonov-Bohm effect.  The estimated sensitivity per shot is expected to exceed current bounds by more that a factor of ten.  I will discuss sources of systematic error and the differential measurement strategies we will use to control them.  I will also describe the design and construction of the high voltage in-vacuum electrodes needed for the experiment.