DAVID GLENN UNDERWOOD
Pilots at Brighton Rd, Naperville, IL
License number
Illinois A2219605
Issued Date
May 2016
Expiration Date
May 2018
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
1216 E Brighton Rd, Naperville, IL 60563
Personal information
See more information about DAVID GLENN UNDERWOOD at radaris.comName
Address
Phone
573 S Rosehall Ln, Round Lake, IL 60073
Professional information
See more information about DAVID GLENN UNDERWOOD at trustoria.com
Particle Beam Generator Using A Radioactive Source
Particle Beam Generator Using A Radioactive Source
US Patent:
5198674, Mar 30, 1993
Filed:
Nov 27, 1991
Appl. No.:
7/798782
Inventors:
David G. Underwood - Naperville IL
Assignee:
The United States of America as represented by the United States
Department of Energy - Washington DC
Department of Energy - Washington DC
International Classification:
H01J 3714
US Classification:
250396ML
Abstract:
The apparatus of the present invention selects from particles emitted by a radioactive source those particles having momentum within a desired range and focuses the selected particles in a beam having at least one narrow cross-dimension, and at the same time attenuates potentially disruptive gamma rays and low energy particles. Two major components of the present invention are an achromatic bending and focusing system, which includes sector magnets and quadrupole, and a quadrupole doublet final focus system. Permanent magnets utilized in the apparatus are constructed of a ceramic (ferrite) material which is inexpensive and easily machined.