Document Type
Thesis
Date of Award
5-31-1987
Degree Name
Master of Science in Electrical Engineering - (M.S.)
Department
Electrical Engineering
First Advisor
Roy H. Cornely
Second Advisor
Marek Sosnowski
Third Advisor
W. H. Warren Ball
Abstract
Energy analysis of the ionized gallium clusters was done by retarding field method. The objective of this research was to investigate the possibility of gallium cluster formation during nozzle jet expansion and to estimate the probability of ionization of clusters. The measurements at a crucible temperature of 1250°C corresponding to gallium vapor pressure of 0.23 torr (inside the crucible) showed that no large cluster sizes could be obtained. The relationship between mass deposition rate (atoms/cm2-sec) and cluster size (atoms/cluster) showed that there were two distinct peaks. One with a cluster size of 1 atom/cluster and the other with about 13 atoms/ cluster. The mass distribution was rather uniform and mainly consisting of single atoms and some multiple atom groups with the largest cluster size calculated to be 27 atoms/cluster. It is believed that in order to generate large cluster size, the measurements should be done at temperatures above 1350°C corresponding to equilibrium vapor pressure of 1.0 torr inside the crucible.
Recommended Citation
Shah, Sujit M., "Investigation of the size of gallium clusters formed using a modified ion cluster beam source with a crucible temperature of 1250 degrees C" (1987). Theses. 3310.
https://digitalcommons.njit.edu/theses/3310
