USA flag logo/image

An Official Website of the United States Government

Large-Area, Low-Cost, High-Resolution X-ray Detector and Electron Amplifier

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2001 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Adelphi Technology, Inc.
2003 E Bayshore Rd Redwood City, CA 94063-4121
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2001
Title: Large-Area, Low-Cost, High-Resolution X-ray Detector and Electron Amplifier
Agency: NASA
Contract: N/A
Award Amount: $0.00


This Phase I Small Business Innovation Research proposal will develop porous dielectrics as a low-cost, large-area detector for high spatial resolution x-ray detection. An alternative to microchannel plates, porous dielectric electron amplifiers are formed by a thin layer, generally less than 1 mm, of a low density dielectric. The microscopic pores formed in such material, provide a natural, but miniaturized, dynode chain for electron amplification when an electric field is applied. An x-ray photon striking the material sets off an avalanche of electrons, creating 100,000 or more electrons per incident photon. However, the small size of the pores along with a preference for propagation in the direction of the electric field result in a limited spread of output electrons from the location of the incident photon. By coupling the porous dielectric to a high resolution anode, we will be able to achieve spatial resolutions of 30 microns or better. Porous dielectrics are easily deposited, which allows the construction of detectors with areas exceeding 100 cm2, at a fraction of the cost of microchannel plates. Phase I work will produce a laboratory area imager to demonstrate the technology, while Phase II will produce commercial prototype x-ray cameras and electron amplifiers.

Principal Investigator:

Charles K. Gary
Vice President

Business Contact:

Melvin A. Piestrup
Small Business Information at Submission:

Adelphi Technology, Inc.
2181 Park Blvd. Palo Alto, CA 94306

Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No