Scrum does not allow making any kind of change in a sprint. As the [Scrum Guide](http://scrumguides.org/scrum-guide.html) describes

> During the Sprint: No changes are made that would endanger the Sprint
> Goal

Although it is not described on the question, chances are that the changes required in those experiments may endanger the Sprint Goal.

Then, the answer to the original question would be:

 * Every change made in the sprint has to be carefully check to not endanger the sprint goal or if that happens, cancel the sprint and plan a new one.

 * Look for another methodology that allows changes in a sprint.

For the second option, a solution could be not to use Scrum but Kanban or [Scrumban](https://www.agilealliance.org/what-is-scrumban/). Scrumban considers defining sprints as in Scrum but it allow changes as needed.