Ronald L Robinson

US Patent:

6353658, Mar 5, 2002

Filed:

Sep 8, 1999

Appl. No.:

09/391578

Inventors:

James E. Trebes - Livermore CA
Gary F. Stone - Livermore CA
Perry M. Bell - Tracy CA
Ronald B. Robinson - Modesto CA
Victor I. Chornenky - Minnetonka MN

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H01J 3520

US Classification:

378123, 378121, 378119

Abstract:

A miniature x-ray source capable of producing broad spectrum x-ray emission over a wide range of x-ray energies. The miniature x-ray source comprises a compact vacuum tube assembly containing a cathode, an anode, a high voltage feedthru for delivering high voltage to the anode, a getter for maintaining high vacuum, a connection for an initial vacuum pump down and crimp-off, and a high voltage connection for attaching a compact high voltage cable to the high voltage feedthru. At least a portion of the vacuum tube wall is highly x-ray transparent and made, for example, from boron nitride. The compact size and potential for remote operation allows the x-ray source, for example, to be placed adjacent to a material sample undergoing analysis or in proximity to the region to be treated for medical applications.

US Patent:

20030161944, Aug 28, 2003

Filed:

Feb 26, 2002

Appl. No.:

10/085550

Inventors:

Randy Barksdale - Livermore CA, US
Ronald Robinson - Modesto CA, US
Sharon Alvarez - San Ramon CA, US
Gary Power - Ripon CA, US

Assignee:

The Regents of the University of California

International Classification:

B05B005/00
B05D003/02
B05D001/12

US Classification:

427/157000, 427/180000, 427/376100

Abstract:

A vacuum deposition process for depositing powdered phosphor on fiber optic face plates, such as the output fiber optic window of gated image intensifiers. The process involves resistive heating vacuum deposition of a powdered phosphor, such as Zn, CD, (S) to a thickness of 7900 Angstroms, for example, after which it is annealed which promotes a columnar growth and makes the phosphor efficient. The thus annealed phosphor can then be directly overcoated with aluminum of a thinner coating than over a powdered phosphor produced by prior known methods due to the smoother surface produced by this process.

US Patent:

61343005, Oct 17, 2000

Filed:

Nov 5, 1998

Appl. No.:

9/186555

Inventors:

James E. Trebes - Livermore CA
Perry M. Bell - Tracy CA
Ronald B. Robinson - Modesto CA

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

H01J 3506

US Classification:

378136

Abstract:

A miniature x-ray source utilizing a hot filament cathode. The source has a millimeter scale size and is capable of producing broad spectrum x-ray emission over a wide range of x-ray energies. The miniature source consists of a compact vacuum tube assembly containing the hot filament cathode, an anode, a high voltage feedthru for delivering high voltage to the cathode, a getter for maintaining high vacuum, a connector for initial vacuum pump down and crimp-off, and a high voltage connection for attaching a compact high voltage cable to the high voltage feedthru. At least a portion of the vacuum tube wall is fabricated from highly x-ray transparent materials, such as sapphire, diamond, or boron nitride.