  Ion-trap quantum computers offer a large number of possible qubit couplings,
each of which requires individual calibration and can be misconfigured. To
enhance the duty cycle of an ion trap, we develop a strategy that diagnoses
individual miscalibrated couplings using only log-many tests. This strategy is
validated on a commercial ion-trap quantum computer, where we illustrate the
process of debugging faulty quantum gates. Our methodology provides a scalable
pathway towards fault detections on a larger scale ion-trap quantum computers,
confirmed by simulations up to 32 qubits.
