Science Research Laboratory, Inc.

Daniel L Goodman

Catherine A Byrne

Guiseppe R Palmese

Provided is the ability to selectively irradiate a designated irradiation target portion of a target material with a beam of electrons. Target material is moved at a substantially constant velocity in one direction along a path that is intersected by an electron beam. The electron beam is translated in a direction transverse to the direction of the target material movement to intersect the designated portion of the target. This enables the designated target portion, e.g., a target irradiation path, to be followed by the electron beam as the target material moves past the beam. Also provided is control of electron beam dose delivered to the designated irradiation target portion. Here, as a target material is moved along the path, the electron beam is also scanned in a direction parallel with the direction of target material movement to control the electron beam dwell time at points along the designated irradiation target portion, to deliver a specified electron beam dose to points along the designated portion of the target material. This scanning can control the electron beam dwell time to deliver a substantially uniform electron beam dose or to deliver an electron beam dose that falls within a specified range of allowable electron beam doses. Also provided is the ability to control the electron beam in response to feedback signals. Here the actual position of the electron beam intersection with the target is detected, and the electron beam translation is adjusted in response to the detected intersection position to maintain intersection of the electron beam with the designated portion of the target material. Additionally, the electron beam scanning can be adjusted in response to the detected intersection position to maintain delivery of the specified electron beam dose to the designated target portion. Preferably, sensors are positioned in a spaced relationship with the designated target portion, e.g., on the target material, in a configuration that defines the designated portion as a path between the sensors.

System for selective electron beam irradiation

A phase-separated elastomeric adhesive formulation and method of using the same are provided. The phase-separated elastomeric adhesive formulation does not require high temperatures in order to achieve bond strength. The material and methods are particularly advantageous for adhesively bonding both thick and irregularly shaped structures through which relatively low doses of electron-beam energy may not penetrate.

Phase-separated dual-cure elastomeric adhesive formulations and methods

The present invention describes materials and methods for forming radiation curable polymer network materials, including coatings, pre-pregs and fiber-reinforced composites. The polymer network materials of the present invention exhibit much lower shrinkage after radiation curing than previous materials and methods, improving the adhesion associated with coatings and pre-pregs, and part fit-up when used to make composite articles. The present invention also describes an improved method for bonding together articles made by the materials and method of the invention, which results in high-strength bonds between articles.

Method of making fiber reinforced composites and coatings

A system for extracting a high power beam from a vacuum in which a beam is generated into atmosphere, which system is formed of: (a) a thin foil window of a material having good heat dissipation properties positioned adjacent the vacuum to permit the beam to pass therethrough; and (b) an air dynamic window between the foil window and the atmosphere. The foil window and air dynamic window are designed such that most of the pressure ratio drop from vacuum to atmosphere is across the foil window and most of the pressure drop in psi is across the air dynamic window.

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Lexington, MA, United States of America

Daniel L Goodman