The performance of a multi guard ring (MGR) diode for clinical electron beams dosimetry

The dosimetric response of a multi guard ring structure (MGR) diode has been studied with clinical electron beam energies from 5 MeV to 15 MeV. The results showed that the MGR dose response is linear in the range of 5–320 cGy and presents reproducibility with variation coefficients less than 0.4%. The field output factors measured with the MGR agreed within 2% with those measured with an ionization chamber. This study evidences that this diode can be used for clinical electron beam dosimetry. •Performance of a multi guard ring structure (MGR) for clinical electron beam dosimetry.•New type of diodes with enhanced tolerance to radiation is evaluated for electron dosimetry.•Clinical electron beam dosimetry with semiconductor detector.