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October 2000 Newsletter - Naval Postgraduate School

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RESEARCH CENTER<br />

RAD-HARD SEMICONDUCTOR CHIPS, continued from page 17<br />

Berkeley, University if Michigan and Vanderbilt and national<br />

laboratories such as; NRL, AFRL, NRAD, JPL, NSWC-<br />

Crane and Draper. Over the last 10 years more than 100 NPS<br />

student theses have been related to radiation effects in<br />

electronics. Some students return to the organizations that<br />

require knowledge on radiation effects which provide close<br />

ties with NPS. Much of the student thesis research interacts<br />

with the engineering duty organizations such as U.S. Navy<br />

Strategic Programs, National Reconnaissance Office and the<br />

Space and <strong>Naval</strong> Warfare Systems Command.<br />

Present and Recent NPS Radiation Effect Research Projects<br />

• 1995 – 1999: NPS faculty lead a program with NRL, UC<br />

THE “LINAC”, continued from page 17<br />

Figure 2 is a view of the accelerator taken from the electron gun end. Figure 3<br />

shows the power klystrons and Figure 4 shows the inside of the high voltage supply<br />

for the klystrons, which is also called the modulator.<br />

Early Research Areas<br />

The main interest of Franz Bumiller concerned the structure of deuterium and the<br />

neutron. This was investigated by measuring the angular distribution of electrons<br />

scattered by the deuterium target. These measurements yielded information about<br />

the distribution of charge in the neutron that is probably still valid today.<br />

Later nuclear experiments<br />

with R. Pittham from<br />

Darmstadt, Germany and<br />

collaborators discovered<br />

experimentally the electric<br />

quadrupole collective oscillation<br />

of medium to heavy<br />

nuclei, as predicted by A.<br />

Bohr. These experiments were<br />

--continued on page 50<br />

Figure 2 (above). A view of the<br />

“beamline.”<br />

Figure 3 (right). Three high power<br />

klystrons deliver power to one ten foot accelerator<br />

section.<br />

Berkeley, Motorola, Honeywell and others to develop<br />

semiconductor wafers for high performance GaAs ICs that<br />

could substitute the unhardened bulk GaAs wafer. The<br />

reengineered wafer is transparent to the manufacturing<br />

process, and provides radiation immunity. (Weatherford/<br />

Fouts)<br />

• 1997 – Present: Work has been performed in conjunction<br />

with the University of Michigan’s Center for Ultrafast<br />

Science to measure picosecond / nanovolt resolution<br />

signals internal to the chip. A 100 femtosecond pulsed<br />

laser is used to simulate a “soft error” and provide optical<br />

sampling to resolve electrical signals. This collabortation<br />

--continued on page 50<br />

Figure 4 (above).<br />

High voltage<br />

supply for the<br />

klystrons, which<br />

is also called the<br />

modulator.<br />

NPS Research page 49<br />

<strong>October</strong> <strong>2000</strong>

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