QuarkNet Classroom Projects
Photons are created in scintillator devices in most modern particle detectors. These photons yield information about particle collisions that must be measured and decoded. This Website follows the track of a photon as it enters a photomultiplier tube (pmt), an amplifying device that increases the effect of a single photon to levels that are measurable. This signal amplification is crucial; without it, no information exists for decoding.
The site presents information regarding the innards of a pmt and allows students to investigate predictive mathematical models describing the signal increase under different, adjustable parameters.
Introduction to Research:
Photomultipler tubes are omnipresent in particle physics. Understanding the creation of their output signals helps to build understanding regarding the entire process of experimental particle physics.
Learner Outcomes: Students will know and be able to:
- Trace energy of a single photon through a photopmulitplier tube.
- Determine the effect of changing the dynode potential.
- Study data plots to determine the best mathematical fit to the presented data.
- See an example of work done on a charge by an electric field.
How can we "see" a single photon?
Assessment is left to the classroom teacher. This website is envisioned as part of a larger unit on measurement or data modeling. Accordingly this unit of study would have an assessment plan that includes the stated outcomes of this website.