%0 Journal Article
%A Holm, Kim Marina
%A Jaekel, Oliver
%A Krauss, Achim
%T Direct determination ofkQfor Farmer-type ionization chambers in a clinical scanned carbon-ion beam using water calorimetry.
%J Physics in medicine and biology
%V 67
%N 4
%@ 0031-9155
%C Bristol
%I IOP Publ.
%M DKFZ-2022-00182
%P 049401
%D 2022
%Z Phys. Med. Biol. 67 (2022) 049401
%X Within two studies, kQ factors for two Farmer-type ionization chambers have been experimentally determined by means of water calorimetry in the entrance channel (EC) of a monoenergetic carbon-ion beam [1] and for a passively modulated spread-out Bragg peak (SOBP) [2]. Both studies were performed at the Heidelberg Ion Beam Therapy Center (HIT) using the PTB portable water calorimeter but applying different initial beam energies of 429 MeV/u for the EC and 278 MeV/u for the SOBP as well as different scanning patterns of the irradiated eld. Comparing their results revealed differences between the experimental kQ factors of up to 1.9
%K SOBP (Other)
%K carbon-ion beams (Other)
%K entrance channel (Other)
%K kQ factors (Other)
%K water calorimetry (Other)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:35086066
%R 10.1088/1361-6560/ac4fa0
%U https://inrepo02.dkfz.de/record/178653