This project is proposed for the direct comparison of primary standards for absorbed dose to water of BEV, METAS and PTB in 60Co and high energy photon beams. The primary standards for application in this comparison are one graphite calorimeter (BEV) and two water calorimeters (METAS, PTB).
The measurement should be carried out in the 60Co and high energy photon beams of METAS and PTB. The BEV will transport the graphite calorimeter primary standard to METAS and PTB for operation in the accelerator fields. The proposed photon beam qualities are generated by electron with energies in the range from 4 MeV to 15 MeV (optional 18 MeV). Additionally, measurements and calibration of different secondary transfer ionization chambers at the same field conditions are planned.
Detailed uncertainty budgets and traceability descriptions of participants are arranged.
For additional project partners the additional operating costs, travel and transport expenses cannot be covered by BEV.
Final Report 2010-10-01
The project has been completed and the report can be downloaded here >>