* If you mean the experience of using or breaking an ampule: "ampule experience" is correct.
* If you mean a specific event or situation related to ampules: You might use a more descriptive phrase, such as "breaking an ampule experience" or "experience with ampules."
Example:
* "I had a scary ampule experience when the glass shattered and I cut myself."
* "The technician explained the proper procedure for breaking an ampule before I began the experiment."
Note: "Ampule" is an alternate spelling of "ampoule," but both spellings are correct.