Measurement of thermal neutron waves at high frequencies in BeO

Waves Trapped by Submerged Obstacles at High Frequencies

As is well known, submerged horizontal cylinders can serve as waveguides for surface water waves. For large values of the wavenumber k in the direction of the cylinders, there is only one trapped wave. We construct asymptotics of these trapped modes and their frequencies as k→∞ in the case of one or two submerged cylinders by means of reducing the initial problem to a system of integral equatio...

Automated Measurement of Complex Permeability and Permittivity at High Frequencies

The paper reports here on the reflection frequency-domain measurements to determine the selected electromagnetic properties of materials using an Agilent 8714ET Network analyzer. The measurement process as well as results evaluation are performed by means of computer control. For this purpose, a VEE program (Agilent technology) has been developed. The discussion concerning the optimisation of m...

High Precision Thermal Neutron Detectors at Brookhaven National Laboratory

‏‎suppression of coke formation in thermal cracking by coke inhibitors‎‏

‏‎the main purpose of this research was to:1.develop a coking model for thermal cracking of naphtha.2.study coke inhibition methods using different coke inhibitors.developing a coking model in naphtha cracking reactors requires a suitable model of the thermal cracking reactor based on a reliable kinetic model.to obtain reliable results all these models shall be solved simultaneously.for this pu...

Neutron Scattering of Spin Waves in Square Lattice Quantum Antiferromagnets at high and low energies

Acknowledgements I would like to thank Henrik Rønnow for his supervision of this master thesis work and for introducing me to the field of quantum magnetism. My thanks also to Kruno Prsa from the LQM and Monica Jimenez from the ILL for their precious help in guiding me through my first TAS experiment. I thank also Ross Stewards and Russel Ewings from ISIS for the time they took to introduce me ...