Abstract: Techniques are described for detecting when background radiation has impacted a qubit without the need for additional hardware. In particular, a quantum system may operate readout hardware to read the state of a qubit in addition to operating the readout hardware to detect when an impact has occurred. Readouts from impacted qubits can then be ignored during error correction, and those qubits reset for subsequent operations. In some cases, a readout resonator coupled to a qubit can be implemented as a readout resonator with a high kinetic inductance.