Raymond Miguel Conrad

US Patent:

46926232, Sep 8, 1987

Filed:

Feb 13, 1986

Appl. No.:

6/835826

Inventors:

Thomas G. Roberts - Huntsville AL
Raymond W. Conrad - Russellville AL
William F. Otto - Huntsville AL
Thomas E. Honeycutt - Somerville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

G01K 1700

US Classification:

250349

Abstract:

The meter consists of wire resistors arranged so as to sample the energy in a laser beam at different locations in the beam. Each resistor is part of a bridge which includes three other resistors, a power source, a detector (volt meter) and a display unit which may be a recorder. One of the three additional resistors may be an additional set of wires which are made nearly identical to the set being used to sense the laser beam's position or to determine its intensity distribution. When the wire resistors are exposed to the laser beam the wires are heated, their resistance changes, and the various bridges become unbalanced. The magnitude of the voltage produced in each bridge is proportional to the energy in the laser pulse at the location of each wire.

US Patent:

47071338, Nov 17, 1987

Filed:

Mar 6, 1986

Appl. No.:

6/841497

Inventors:

Thomas G. Roberts - Huntsville AL
Raymond W. Conrad - Russellville AL
Thomas E. Honeycutt - Somerville AL

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

G01J 342

US Classification:

356320

Abstract:

A system for measuring the density of certain ions or neutrals within a plasma without probe intervention. When cylindrical symmetry is present, the system also provides measurement of spatial distribution of excited ionic states within the plasma. The system allows spatial distribution of contaminant ions in magnetic confinement thermonuclear fusion devices to be monitored. These functions are accomplished by directing two laser beams through a region containing a plasma. The laser means are at respective wavelengths chosen to be in and closely adjacent to a spectral region near the electronic transition frequency of the ionic species of interest in the plasma. The intensities of the two wavelengths are then measured and compared to obtain the desired data and characterization.