A test probe inserted in a specific heat exchanger tube is used to produce test data of non-destructive testing of the specific heat exchanger tube. The test data of the non-destructive testing of the specific heat exchanger tube is accessed. A structural health assessment of the specific heat exchanger tube is determined, using the accessed test data of the non-destructive testing of the specific heat exchanger tube in comparison to calibration data from testing of at least one calibration standard heat exchanger tube that is more closely related to the specific heat exchanger tube than to a generic tube.

A test probe inserted in a specific heat exchanger tube is used to produce test data of non-destructive testing of the specific heat exchanger tube. The test data of the non-destructive testing of the specific heat exchanger tube is accessed. A structural health assessment of the specific heat exchanger tube is determined, using the accessed test data of the non-destructive testing of the specific heat exchanger tube in comparison to calibration data from testing of at least one calibration standard heat exchanger tube that is more closely related to the specific heat exchanger tube than to a generic tube.

Aspects of the present disclosure describe techniques for fast cooling of ion motion in a long chain using local motional modes. For example, a method is described for cooling down ions in a chain of ions that includes performing a cooling down sequence in which phonons are removed from the ions in the chain of ions by exciting and de-exciting local motional modes associated with individual ions, wherein sideband transitions that are part of the cooling down sequence are driven faster for the local motional modes than for collective motional modes for the same chain of ions; and completing the cooling down sequence when the local motional modes reach a ground state. A corresponding system and computer-readable storage medium for fast cooling of ion motion in a long chain using local motional modes are also described.

Aspects of the present disclosure describe techniques for fast cooling of ion motion in a long chain using local motional modes. For example, a method is described for cooling down ions in a chain of ions that includes performing a cooling down sequence in which phonons are removed from the ions in the chain of ions by exciting and de-exciting local motional modes associated with individual ions, wherein sideband transitions that are part of the cooling down sequence are driven faster for the local motional modes than for collective motional modes for the same chain of ions; and completing the cooling down sequence when the local motional modes reach a ground state. A corresponding system and computer-readable storage medium for fast cooling of ion motion in a long chain using local motional modes are also described.