PROJECT TITLE :

Improvements to the Volume Measurement of 28Si Spheres to Determine the Avogadro Constant

ABSTRACT:

Within the determination of the Avogadro constant using the X-ray crystal density method with a 28Si-enriched crystal prepared by the International Avogadro Coordination (IAC) project, the quantity measurement and surface analysis of 28Si spheres play an important role. For correct volume determination, an optical interferometer has been improved taking account of the geometrical form of the optical parts. Furthermore, a replacement spectroscopic ellipsometer with a sphere rotation system has been developed for accurate surface analysis. The optical interferometer and also the ellipsometer have been used for the degree determination and surface analysis of the 28Si spheres repolished by the IAC, respectively. On the premise of the preliminary uncertainty estimation, the relative standard uncertainty of the apparent volume measurement has been reduced from four.4 to two.seven by the development of the interferometer. The quantity of ellipsometric measurement points on the sphere surface has been increased from 20 to 7782 by the installation of the new ellipsometer, yielding additional reliable data on the sphere surface. Details of the enhancements and therefore the preliminary results of the measurements of the 28Si spheres are given.


Did you like this research project?

To get this research project Guidelines, Training and Code... Click Here


PROJECT TITLE :Z-Source Inverter: Topology Improvements ReviewABSTRACT:One in all the foremost promising power electronics converter topologies is that the Z-supply inverter (ZSI). The ZSI is an emerging topology for power electronics
PROJECT TITLE :Cool Facts About Cooling Electric Motors: Improvements in Applications That Fall Outside the Normal Operating ConditionsABSTRACT:The evolution of electrical motor design because it pertains to cooling strategies
PROJECT TITLE :Electric Machine Drive Design Improvements Through Control and Digital Signal Processing TechniquesABSTRACT:Developing the control algorithms of electric machine drives for less noise and harmonics is proposed here
PROJECT TITLE :Call for papers [Special Issue on Partial Discharges Detection, Measurement, and Interpretation]ABSTRACT:A special issue of the IEEE Transactions on Dielectrics and Electrical Insulation is being planned on Partial
PROJECT TITLE :Power quality improvements in a zeta converter for brushless DC motor drivesABSTRACT:This study deals with a reduced sensor configuration of an influence issue correction (PFC) primarily based zeta converter for

Ready to Complete Your Academic MTech Project Work In Affordable Price ?

Project Enquiry