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Challenges: reference versus relative dosimetry

Reference conditions

Non reference conditions:

Relative dosimetry

- Uniform electron fluence distribution over the

detector.

- Beam spectra at the reference point in ref.

conditions known.

- Detector of choice:

Ion Chambers

- Non-Uniform electron fluence distribution over

the detector.

VOLUME AVERAGING

- Beam spectra at the reference point may differ

from beam spectra at the measuring point.

ENERGY DEPENDENCE; PERTURBATION

FACTORS

- Detector of choice:

???