Recent proton microprobe studies on trace elements in several human disorders have shown the superiority of the proton as compared to the electron microprobe. This has been dramatically demonstrated in the studies of aluminum in Alzheimer's disease. The objective of the Phase I work was to design a beam-focusing system with 0.3 micron resolution (comparable to an electron microprobe) and at least 100 picoamperes of current. These goals have been surpassed, and we can achieve 0. I microns resolution with at least 100 picoamperes of current. The objectives of the Phase II work are to complete an engineering design of the system, acquire all components, assemble the system and test it in all regards other than with a beam in our laboratory. The focusing system will then be installed at the University of Florida Van de Graaff accelerator and commissioned with the 2.5 MeV proton beam. Aberrations and resolutions will be measured and optimized respectively. Preliminary measurements with biological tissue will be performed to establish scan rates that produce acceptable tissue damage. This instrument, with 3 times greater spatial resolution and 100 times greater elemental sensitivity than an electron microprobe, has superior potential for breakthroughs in many areas of research in biology and material science.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Small Business Innovation Research Grants (SBIR) - Phase II (R44)
Project #
5R44NS026978-03
Application #
2266217
Study Section
Special Emphasis Panel (SSS (B1))
Project Start
1989-01-01
Project End
1993-02-28
Budget Start
1991-09-01
Budget End
1993-02-28
Support Year
3
Fiscal Year
1991
Total Cost
Indirect Cost
Name
Nanoptics, Inc.
Department
Type
DUNS #
City
Gainesville
State
FL
Country
United States
Zip Code
32609