[An analysis on thickness effect of lithium fluoride detector in proton measurement]

To theoretically analyze the thickness effect of a LiF detector for proton measurement.

Thickness effect of the detector was calculated by using the definition of the detector dose under ideal and reasonable hypothesis.

The thickness effect of the detector was not obvious when protons could penetrate the detector: when proton energy was above 12 MeV, the thickness effect was obvious only on condition that the detector thickness approaches proton range, when proton energy was less than 12 MeV, the thickness effect was not obvious. The thickness effect of the detector was obvious, when protons could not penetrate the detector.

Thin detectors should be used in low energy proton measurements to avoid thickness effect of the detector.