history:ve7js
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- | > | + | >It was with great sadness that his colleagues in Winnipeg learned of the death of Francis Konopasek on 28th October 2010 in British Columbia. A Professor of Physics at the University of Manitoba until his retirement in 1989, Francis played a fundamental and specialized role in the upgrading and development of the negative ion cyclotron facility here in the late seventies and eighties. The upgrading of the accelerator planned and largely implemented by the late Professor Saewong Oh finally reached fruition through the expertise of our in-house RF expert Francis Konopasek. Under his guidance, with new DEES and DEE-tips, the mode of particle acceleration was changed from push-pull mode to push-push, and with additional shimming of the magnetic field, only the main magnet remained unchanged. The energy available increased to 50 MeV for protons (H-) and now included deuterons (D-) of energies up to 25 MeV, with currents up to 20µA possible for both. Increasing the DEE voltage increased the energy gain per turn and transformed the cyclotron to a performance and variability comparable to that of a Van de Graaf accelerator at lower energy. In the end, Francis and the machine development group made this transformation possible. |
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- | >It was with great sadness that his colleagues in Winnipeg learned of the death of Francis Konopasek on 28th October 2010 in British Columbia. A Professor of Physics at the >University of Manitoba until his retirement in 1989, Francis played a fundamental and specialized role in the upgrading and development of the negative ion cyclotron facility here in the late seventies and eighties. The upgrading of the accelerator planned and largely implemented by the late Professor Saewong Oh finally reached fruition through the expertise of our in-house RF expert Francis Konopasek. Under his guidance, with new DEES and DEE-tips, the mode of particle acceleration was changed from push-pull mode to push-push, and with additional shimming of the magnetic field, only the main magnet remained unchanged. The energy available increased to 50 MeV for protons (H-) and now included deuterons (D-) of energies up to 25 MeV, with currents up to 20µA possible for both. Increasing the DEE voltage increased the energy gain per turn and transformed the cyclotron to a performance and variability comparable to that of a Van de Graaf accelerator at lower energy. In the end, Francis and the machine development group made this transformation possible. | + | |
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history/ve7js.txt · Last modified: 2021/09/23 18:03 by va7fi