hdpe monofilaments were obtained using different extruders and drawn by post-extruder equipments. after solidification, drawn and undrawn monofilaments (draw ratio 7:1) were irradiated with 10 mev electron beams in air at room temperature at 25, 50, 75, 100 and 125 kgy dose ranges to induce a network structure. hdpe crosslinking was studied on the basis of gel content measurements. the fibers w...

A new type of rotating anticathode X-ray generator has been developed, in which the electron beam irradiates the inner surface of a U-shaped anticathode (Cu). A high-flux electron beam is focused on the inner surface by optimizing the shape of the bending magnet. The power of the electron beam can be increased to the point at which the irradiated part of the inner surface is melted, because a s...

introduction: nowadays new radiochromic films have an essential role in radiotherapy dosimetry. properties such as high sensitivity, good reproducibility, high spatial resolution, easy readout and portability have made them attractive for dosimetry, especially in high-dose-gradient regions. material and methods: in this study, electron-beam dose distributions in homogenous and heterogeneous pha...

cross linking of high density polyethylene (hdpe) was first performed via high energy10 mev electron beam (eb) irradiation. hdpe was also cross linked withdicumyle peroxide (dcp).the gel content of samples was determined by solvent extraction.degree of cross linking was evaluated by hot set apparatus; as well .in order to clarify the effectof nature of cross linking, correlation of electrical p...

a total of 300 one-day old male broilers (cobb 500) were randomly divided into four treatment groups. the groups comprised of 15 birds each, and were defined by diet and the birds in each group were fed 0 (control), 3, 5, or 7 kgy electron-beam irradiated diets. a total of 5 replicates were performed. the chemical composition of the diet was not affected by irradiation.irradiation doses of 5 an...

This work is concerned with challenges in optimizing optical metamaterials with a negative effective permeability and a negative effective permittivity (double-negative metamaterials, DNM). We demonstrate the huge importance of linking the fabrication parameters and the results of optical and structural characterization of fabricated prototypes with a given optimal design environment. Specifica...

The soft X-ray reflectivity characterization of Mo/Si multilayer deposited by electron beam evaporation is discussed. The measurements are performed on Indus-1 synchrotron storage ring. The interdiffusion of two-layer materials in multilayer leads to the formation of interlayers. To understand the influence of interlayers and interfacial roughness on soft X-ray reflectivity profile, simulation ...

A rapid and simple fabrication method to construct tiny shadow-masks and their use in multi-layer surface patterning with in-situ micromechanical alignment is presented. Free-standing shadow-mask membranes are made of a 5-μm-thick SU-8 based resist layer by photolithography. They are supported by a 1-mm-large and 150-μm-thick SU-8 rim. The membrane has apertures with feature sizes ranging from ...

Title of Thesis: FABRICATION AND MEASUREMENT OF CESIATED METAL PHOTOCATHODES Nathan A. Moody, Master of Science, 2004 Thesis Directed By: Professor Patrick O’Shea Department of Electrical and Computer Engineering A requirement for accelerator applications such as free electron lasers is a high current, high quality electron beam. This is achieved using a photoinjector, where a drive laser modul...