It was a great learning experience for me to hear from researchers Franko Greiner and Franz Xaver Bronold of Kiel University and University of Greifswald respectively about the new model they have developed to measure the sticking coefficient of low energy electrons. When an insulating material is placed in a stream of electrons it acquires surface charge. For low energy electrons this charge is negative as they lack energy to cause electron emission from the dielectric surface. In this presentation researchers Franko and Franz demonstrated a highly creative method of measuring the number of electrons that remain trapped on the dielectric surface. Their method was to suspend dust particles inside the plasma sheath causing them to levitate as they acquire charge. On these charged particles when an oscillating electric field was applied it resulted in the oscillation of the particle itself. The resulting oscillation of the particle was captured by high speed cameras. Thr...
Yesterday at the biennial meeting of the Combustion Institute President Hai Wang outlined some of the achievements and challenges facing the organisation. As a non profit initiative the CI has been highly successful in organising the scientists working in the field of combustion giving them a platform to publish their findings as well as exchange ideas during in person meets and symposiums. Even as the focus shifts towards electrification, combustion science remains important and this was reflected in the membership of CI which grew to 10 thousand and the number of papers published which crossed the 1.2 thousand figure mark indicating healthy activity. CI has managed to remain cash flow positive which enabled it to function as an independent organisation. This is a significant achievement for a non profit as it generally has to depend upon donations for its financial health. Being cash flow positive has allowed the CI to maintain its research integrity. As Presid...