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Investigation of strain birefringence and wavefront distortion in 001 plates of KD sub 2 PO sub 4
When 001 plates of KD{sub 2}PO{sub 4} (KD*P) are used in Pockels cells, strain induced refractive index variations result in beam depolarization and transmitted wavefront distortion. The depolarization is determined by the induced birefringence while the wavefront distortion is controlled by the average index shift. Here we show that the birefringence is determined by the shear stress in the xy-plane of the crystal while the average index shift depends only on the normal stresses. Furthermore, for depolarization losses of 0.1 to 1.0% and wavefront distortion of 0.1 to 1.0{lambda}, the critical range of stress is 10{sup 5} to 10{sup 6} Pa. We also present measured depolarization loss and wavefront distortion profiles for 5, 16 and 27cm, 95% deuterated, KD*P crystals. Using the analysis described above we show that the maximum internal stresses in the crystals are within the critical range, but that the area averaged stresses are substantially lower. We find that crystals from different locations along the length of a boule have similar strain birefringence and wavefront distortion profiles indicating that the growth conditions which generate the internal strain persist throughout much of the growth history of the boule. Finally, we discuss potential sources of strain in KD*P. 8 …
Date:
August 26, 1991
Creator:
De Yoreo, J. J. & Woods, B. W.
Object Type:
Article
System:
The UNT Digital Library
Interferometric measurements of multilayer and double shell inertial fusion targets
Optical interference microscopy plays an important role in the measurement of targets for inertial confinement fusion experiments. We describe how these techniques are applied to the measurement of thickness and refractive index of multilayer films on both flat substrates and microsphere targets. We also discuss procedures for manipulating and examining microsphere targets to measure defects and wall thickness variations anywhere on the target. Finally, we describe the use of optical interferometry to measure the individual components and final assembled structure of double-shell targets. The accuracy of these measurements is from 0.03 to 0.5 ..mu..m, depending on the specific application.
Date:
August 26, 1980
Creator:
Weinstein, B.W.; Weir, J.T. & Willenborg, D.L.
Object Type:
Article
System:
The UNT Digital Library
Use of molecular beams to support microspheres during plasma coating
Spherical laser fusion targets can be levitated on beams of Ar or other gas atoms. This is an especially useful and reliable technique for supporting microspheres during plasma coating or plasma etching. The reliability of this technique is principally the result of two things: the success of a special centering device which provides a lateral, stabilizing force on the levitated microspheres; and a gas handling system which is capable of controlling levitation gas flow in the microtorr liter/sec range. We have determined that the operational regime of this device is that of Knudsen's flow. This knowledge of the flow characteristics has been important in developing this device.
Date:
August 26, 1980
Creator:
Crane, J. K.; Smith, R. D.; Johnson, W. L.; Letts, S. A.; Korbel, G. R. & Krenick, R. M.
Object Type:
Article
System:
The UNT Digital Library
Silver recovery system data
In August of 1990 the Savannah River Site Photography Group began testing on a different type of silver recovery system. This paper describes the baseline study and the different phases of installation and testing of the system.
Date:
August 26, 1991
Creator:
Boulineau, B.
Object Type:
Report
System:
The UNT Digital Library
High-velocity impact tests involving thin spherical shells of tantalum and 304 stainless steel
This experimental program generated data to improve computer-code modeling of impact phenomena. The improved computation technique will be used to design a fissile-material container able to withstand a 335 m/s impact. The program involved flyer-plate-impact tests using thin shells of annealed 304 stainless steel and annealed tantalum at impact velocities of 28 to 180 m/s. No active instrumentation was used in this study; instead, all data were derived from measurements of test specimens. Pre- and post-test measurement of interior and exterior dot patterns etched on the shells provided surface-strain information. Radiographs of the deformed shells provided shell-contour data that we plotted vs impact velocity. Curves were fit to these data. We found that normalized crush height varies almost linearly with impact velocity for both materials, that normalized radius of contact varies directly with impact velocity for both materials but appears independent of shell thickness for tantalum, and that normalized interior-fold radius varies inversely with impact velocity and directly with shell thickness for stainless steel, but no clear relationship appears for tantalum.
Date:
August 26, 1977
Creator:
Steffan, K. L.
Object Type:
Report
System:
The UNT Digital Library
[News Clip: Ryan]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
August 26, 1994, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Crime health]
Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
August 26, 1994, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
The application of the ADSP-21020 40-bit floating point DSP microprocessor in a digital Doppler radar
A continuous wave doppler radar system has been designed which is portable, easily deployable and can be remotely controlled. The system is immune to ground clutter and is used for wind speed detection and direction determination. Nearly real time digital signal processing is performed by an Analog Devices ADSP-21020, a 40-bit floating point Digital Signal Processing (DSP) microprocessor. This paper provides an overview of the design of the system including the radio frequency (RF) to digital interface. The various DSP detection algorithms are discussed and compared to system performance and sensitivity. Finally, DSP performance is compared to the performance of an earlier system using Analog Device's ADSP-2100. 6 refs.
Date:
August 26, 1991
Creator:
Robinson, S. H. & Morrison, R. E.
Object Type:
Article
System:
The UNT Digital Library
The Oklahoma Democrat. (Altus, Okla.), Vol. 3, No. 21, Ed. 1 Thursday, August 26, 1909
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 1909
Creator:
Ruthruff, C. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Guthrie Daily News. (Guthrie, Okla. Terr.), Vol. 5, No. 1570, Ed. 1 Sunday, August 26, 1894
Daily newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
August 26, 1894
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Guthrie Daily News. (Guthrie, Okla. Terr.), Vol. 5, No. 1570, Ed. 2 Sunday, August 26, 1894
Daily newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
August 26, 1894
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat (Altus, Okla.), Vol. 8, No. 25, Ed. 1 Thursday, August 26, 1915
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 1915
Creator:
Powell, Eugene
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Oklahoma Weekly Leader (Guthrie, Okla.), Vol. 30, No. 26, Ed. 1 Thursday, August 26, 1920
Weekly newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 1920
Creator:
Niblack, Leslie G.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla.), Vol. 22, No. 9, Ed. 1 Wednesday, August 26, 1908
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 1908
Creator:
Taylor, J. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Greer County Democrat (Mangum, Okla.), Vol. 25, No. 50, Ed. 1 Thursday, August 26, 1915
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 1915
Creator:
Watt, W. O.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Indianola Press. (Indianola, Indian Terr.), Vol. 2, No. 4, Ed. 1 Friday, August 26, 1904
Weekly newspaper from Indianola, Indian Territory that includes local, territorial, and national news along with advertising.
Date:
August 26, 1904
Creator:
Johnson, L. C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Weekly News. (Altus, Okla.), Vol. 16, No. 26, Ed. 1 Thursday, August 26, 1915
Weekly newspaper from Altus, Oklahoma that includes local, county, state, and national news along with advertising.
Date:
August 26, 1915
Creator:
Orr, J. P.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Altus Weekly News (Altus, Okla.), Vol. 21, No. 26, Ed. 1 Thursday, August 26, 1920
Weekly newspaper from Altus, Oklahoma that includes local, county, state, and national news along with advertising.
Date:
August 26, 1920
Creator:
Keith, E. C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Crowder City Guardian (Crowder, Oklahoma), Vol. 7, No. 50, Ed. 1 Monday, August 26, 1912
Weekly newspaper from Crowder, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 1912
Creator:
Barrow, A. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Cushing Independent. (Cushing, Okla.), Vol. 8, No. 40, Ed. 1 Thursday, August 26, 1909
Weekly newspaper from Cushing, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 1909
Creator:
Holland, Al. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 30, No. 26, Ed. 1 Thursday, August 26, 1920
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 1920
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Kiowa Sentinel. (Kiowa, Indian Terr.), Vol. 1, No. 35, Ed. 1 Friday, August 26, 1904
Weekly newspaper from Kiowa, Indian Territory that includes local, territorial, and national news along with advertising.
Date:
August 26, 1904
Creator:
Vernon, Dowd & Vernon, John C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Crowder City Guardian (Crowder, Oklahoma), Vol. 5, No. 43, Ed. 1 Friday, August 26, 1910
Weekly newspaper from Crowder, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 1910
Creator:
Barrow, A. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Tyrone Observer. (Tyrone, Okla.), Vol. 6, No. 3, Ed. 1 Thursday, August 26, 1909
Weekly newspaper from Tyrone, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 26, 1909
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History