Harry G Phillips

US Patent:

7471052, Dec 30, 2008

Filed:

Aug 23, 2005

Appl. No.:

11/209284

Inventors:

Genfa Wu - Yorktown VA, US
Harry Lawrence Phillips - Hayes VA, US

Assignee:

Jefferson Science Associates - Newport News VA

International Classification:

H01J 23/00

US Classification:

315500, 324690, 250309

Abstract:

A cryogenic vacuum rf feedthrough device comprising: 1) a probe for insertion into a particle beam; 2) a coaxial cable comprising an inner conductor and an outer conductor, a dielectric/insulating layer surrounding the inner conductor, the latter being connected to the probe for the transmission of higher mode rf energy from the probe; and 3) a high thermal conductivity stub attached to the coaxial dielectric about and in thermal contact with the inner conductor which high thermal conductivity stub transmits heat generated in the vicinity of the probe efficiently and radially from the area of the probe and inner conductor all while maintaining useful rf transmission line characteristics between the inner and outer coaxial conductors.

US Patent:

57526451, May 19, 1998

Filed:

Feb 29, 1996

Appl. No.:

8/608682

Inventors:

Harry Lawrence Phillips - Seaford VA
Thomas S. Elliott - Yorktown VA

Assignee:

Southeastern Universities Research Ass., Inc. - Washington DC

International Classification:

B23K 3102

US Classification:

2281246

Abstract:

The present invention is a superconducting radiofrequency window assembly for use in an electron beam accelerator. The srf window assembly (20) has a superconducting metal-ceramic design. The srf window assembly (20) comprises a superconducting frame (30), a ceramic plate (40) having a superconducting metallized area, and a superconducting eyelet (50) for sealing plate (40) into frame (30). The plate (40) is brazed to eyelet (50) which is then electron beam welded to frame (30). A method for providing a ceramic object mounted in a metal member to withstand cryogenic temperatures is also provided. The method involves a new metallization process for coating a selected area of a ceramic object with a thin film of a superconducting material. Finally, a method for assembling an electron beam accelerator cavity utilizing the srf window assembly is provided. The procedure is carried out within an ultra clean room to minimize exposure to particulates which adversely affect the performance of the cavity within the electron beam accelerator.

US Patent:

56105673, Mar 11, 1997

Filed:

Apr 25, 1994

Appl. No.:

8/232759

Inventors:

Harry L. Phillips - Seaford VA
Thomas S. Elliott - Yorktown VA

Assignee:

Southeastern Universities Research Assn., Inc. - Newport News VA

International Classification:

H01P 108

US Classification:

333252

Abstract:

The present invention is a superconducting radiofrequency window assembly for use in an electron beam accelerator. The srf window assembly (20) has a superconducting metal-ceramic design. The srf window assembly (20) comprises a superconducting frame (30), a ceramic plate (40) having a superconducting metallized area, and a superconducting eyelet (50) for sealing plate (40) into frame (30). The plate (40) is brazed to eyelet (50) which is then electron beam welded to frame (30). A method for providing a ceramic object mounted in a metal member to withstand cryogenic temperatures is also provided. The method involves a new metallization process for coating a selected area of a ceramic object with a thin film of a superconducting material. Finally, a method for assembling an electron beam accelerator cavity utilizing the srf window assembly is provided. The procedure is carried out within an ultra clean room to minimize exposure to particulates which adversely affect the performance of the cavity within the electron beam accelerator.