Sökning: "Metrology"
Visar resultat 21 - 25 av 75 avhandlingar innehållade ordet Metrology.
21. Studies of Heavy Ion Induced Desorption in the Energy Range 5-100 MeV/u
Sammanfattning : During operation of heavy ion accelerators a significant pressure rise has been observed when the intensity of the high energy beam was increased. The cause for this pressure rise is ion induced desorption, which is the result when beam ions collide with residual gas molecules in the accelerator, whereby they undergo charge exchange. LÄS MER
22. Image-based quantitative infrared analysis and microparticle characterisation for pulp and paper applications
Sammanfattning : Measurements of process variations and particle morphology are widely employed in the pulp and paper industry. Two techniques with high potential, infrared thermography and microparticle characterisation, are mainly used qualitatively. LÄS MER
23. Studies of Tropospheric and Stratospheric Aerosol using Ion Beam Analysis
Sammanfattning : Atmospheric aerosol particles are believed to have an impact on the radiative forcing of the earth's surface. The predicted results indicate a net cooling effect on the global climate, however there are few studies available to substantiate this and experimental data are needed. LÄS MER
24. New single particle methods for detection and characterization of nanoparticles in environmental samples
Sammanfattning : Nanoparticles (NP) are being used in rapidly increasing quantities which has resulted in concerns about possible harmful effects for health and environment. NP are already undergoing similar risk assessment programs as conventional chemicals, and due to their enhanced surface reactivities it has been proposed that the use of NP should be regulated by specific legislation based on particle size. LÄS MER
25. Frequency stable diode lasers in atomic physics and fundamental metrology
Sammanfattning : .... LÄS MER