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@inproceedings{thuillier:ecris2020-tuxzo03, author = {T. Thuillier and O. Bajeat and A. Leduc and L. Maunoury}, title = {{Angular Distribution Measurement of Atoms Evaporated from a Resistive Oven Applied to Ion Beam Production}}, booktitle = {Proc. ECRIS'20}, % booktitle = {Proc. 24th International Workshop on ECR Ion Sources (ECRIS'20)}, pages = {72--77}, eid = {TUXZO03}, language = {english}, keywords = {experiment, simulation, vacuum, ECR, extraction}, venue = {East Lansing, MI, USA}, series = {International Workshop on ECR Ion Sources}, number = {24}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {07}, year = {2022}, issn = {2222-5692}, isbn = {978-3-95450-226-4}, doi = {10.18429/JACoW-ECRIS2020-TUXZO03}, url = {https://jacow.org/ecris2020/papers/tuxzo03.pdf}, abstract = {{A low temperature oven has been developed to produce calcium beam with Electron Cyclotron Resonance Ion Source. The atom flux from the oven has been studied experimentally as a function of the temperature and the angle of emission by means of a quartz microbalance. The absolute flux measurement permitted to derive Antoine’s coefficient for the calcium sample used : A=8.98± 0.07 and B=7787± 110 in standard unit. The angular FWHM of the atom flux distribution is found to be 53.7±7.3 °at 848K. The atom flux hysteresis observed experimentally in several laboratories is explained as follows: at first calcium heating, the evaporation comes from the sample only resulting in a small evaporation rate. once a full calcium layer has formed on the crucible refractory wall, the caclcium evaporation surface includes the crucible’s enhancing dramatically the evaporation rate for a givent temperature. A Monte-Carlo code, developed to reproduce and investigate the oven behaviour as a function of temperature is presented. A discussion on the gas regime in the oven is proposed as a function of its temperature. A fair agreement between experiment and simulation is found.}}, }