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1.1-meter bore, 8-Tesla test facility
The design and fabrication of a 1.1-m bore superconducting coil for an 8- T facility at Lawrence Livermore Laboratory are discussed. This facility will provide the backing field required for testing large multifilamentary Nb$sub 3$Sn coils as part of the superconductor development program at Livermore. The magnet measures 1.85 m o.d., is 1.5 m in length, and is solenoid wound in four separate modules. Total cold weight of the assembly is 18,000 Kg. A NbTi superconductor is used throughout with a gradation of current density within the magnet to provide complete cryostatic stability. The preliminary design of a large 3500-A multifilamentary Nb$sub 3$Sn insert magnet is also included. Together, the backing coil and insert magnets are designed to produce a 12-T central field in a 0.4m bore. The ''equal area'' theory of cryostatic stability is applied in the design of both magnet systems and is discussed in detail. A large open-mouth cryostat is used and measures 2 m in diameter and 3.7 m in length. Details of Dewar design and the refrigeration requirements are included. (auth)
Date:
November 19, 1975
Creator:
Nelson, R.; Cornish, D.; Zbasnik, J.; Sackett, S. & Taylor, C.
Object Type:
Article
System:
The UNT Digital Library
1.06 μm 150 psec laser damage study of diamond turned, diamond turned/ polished and polished metal mirrors
Using a well characterized 1.06 μm 150 ps glass laser pulse the damage characteristics for diamond turned, diamond turned/ polished, and polished copper and silver mirrors less than 5 cm diameter were studied. Although most samples were tested with a normal angle of incidence, some were tested at 45$sup 0$ with different linear polarization showing an increase in damage threshold for S polarization. Different damage mechanisms observed will be discussed. Laser damage is related to residual surface influences of the fabrication process. First attempts to polish diamond turned surfaces resulted in a significant decrease in laser damage threshold. The importance of including the heat of fusion in the one dimensional heat analysis of the theoretical damage threshold and how close the samples came to the theoretical damage threshold is discussed. (auth)
Date:
July 24, 1975
Creator:
Saito, T. T.; Milam, D.; Baker, P. & Murphy, G.
Object Type:
Article
System:
The UNT Digital Library
[The 1,000th Ph.D. Recipient, #1]
Photograph of the 1,000th person to graduate from North Texas State University with a Ph.D. degree; he is wearing a dark colored robe and holding a paper on top of his mortarboard. An unidentified professor next to him (right) is pointing to something on the paper. They are standing in front of wood-paneled walls with a floor-to-ceiling curtain as well as a statue in the right side of the image and artwork partially visible on the left.
Date:
December 22, 1975
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[The 1,000th Ph.D. Recipient, #2]
Photograph of the 1,000th student to graduate from North Texas State University with a Ph.D. degree. He is wearing dark-colored robes and a mortarboard, standing in the corner of a wood-paneled room. An unidentified faculty member is standing in front of him and shaking his hand.
Date:
December 22, 1975
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[The 1,000th Ph.D. Recipient, #3]
Photograph of a student wearing commencement robes and a mortarboard, shaking hands with an unidentified faculty member (left). The student is the 1,000 person to graduate from North Texas State University with a Ph.D. degree. They are standing in the corner of a wood-paneled room and several framed certificates and plaques are on the wall in the right side of the image.
Date:
December 22, 1975
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[The 1,000th Ph.D. Recipient, #4]
Photograph an unidentified faculty member shaking hands with the 1,000th person to graduate from North Texas State University with a Ph.D. degree. The student is wearing dark-colored robes with a mortarboard. They are standing in the corner of a wood-paneled room with floor-to-ceiling curtains to the left.
Date:
December 22, 1975
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[The 1,000th Ph.D. Recipient, #5]
Photograph of an unidentified faculty member with the 1,000th recipient of a North Texas State University Ph.D. degree; they are shaking hands, but turned so that both of them can look at the camera. The student is wearing dark-colored graduation robes and a mortarboard. They are standing in the corner of a wood-paneled room.
Date:
December 22, 1975
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[The 1,000th Ph.D. Recipient, #6]
Photograph of the 1,000th graduate to receive a Ph.D. from North Texas State University, shaking hands with an unidentified professor, turned so that they can both face the camera. The student is wearing dark-colored graduation robes and a mortarboard; the tassel is partially obscuring his face. They are standing in the corner of a wood-paneled room.
Date:
December 22, 1975
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[The 1,000th Ph.D. Recipient, #7]
Photograph of a student wearing graduation robes and a mortarboard, standing between two unidentified faculty members, who are facing him. The student is the 1,000 person to graduate from North Texas State University with a Ph.D. degree. They are standing in the corner of a wood-paneled room, in front of a statue on a pedestal that is partially visible in the center of the image.
Date:
December 22, 1975
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[The 1,000th Ph.D. Recipient, #8]
Photograph of the 1,000th student to graduate from North Texas State University with a Ph.D. degree. He is wearing dark-colored robes and a mortarboard, standing in the corner of a wood-paneled room. An unidentified faculty member is standing in front of him and is excitedly waving his hands up.
Date:
December 22, 1975
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[The 1,000th Ph.D. Recipient, #9]
Photograph of a student wearing graduation robes and a mortarboard, standing between two unidentified faculty members, shaking hands with the man to his left. The student is the 1,000 person to graduate from North Texas State University with a Ph.D. degree. They are standing in the corner of a wood-paneled room.
Date:
December 22, 1975
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[The 1,000th Ph.D. Recipient, #10]
Photograph of a student wearing graduation robes and a mortarboard, standing between two unidentified faculty members, shaking hands with the man to his left. The student is the 1,000 person to graduate from North Texas State University with a Ph.D. degree. They are standing in the corner of a wood-paneled room.
Date:
December 22, 1975
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
3 elektronische Studien
Access:
Use of this item is restricted to the UNT Community
Recording of Lothar Voigtländer's 3 elektronische Studien. The basis for the composition are the poems of the poet Erich Arendt. The poems were written around 1925 in his Expressionist creative period. Accordingly, the compositional means: concrete musical material is mixed with electronic sounds to achieve a strongly expressive and suggestive associative effect. It is less thought of as a "setting" of the texts, but should be added to the often strongly symbolic language formulations as a different, musical dimension. The vocals and the piano usually work live. The piano is mostly treated as unrecognizable - this is to achieve a seamless insertion into the electro-acoustic sound material. In a performance, both piano and singer can be electro-acoustically amplified and to a lesser extent technically manipulated (reverberation, iteration, etc).
Date:
1975
Creator:
Voigtländer, Lothar, 1943-
Object Type:
Sound
System:
The UNT Digital Library
4$pi$ detector for correlation experiments
None
Date:
June 12, 1975
Creator:
Thorndike, A. M.
Object Type:
Report
System:
The UNT Digital Library
[5 Victorian Commercial Row Buildings]
Photograph of the five Victorian Commercial Row Buildings in Maypearl, Texas.
Date:
August 12, 1975
Creator:
Texas Historical Commission
Object Type:
Photograph
System:
The Portal to Texas History
A-6 pyrofoil wrapper strain capability prerequisite proof tests (EML-93)
Proof test on the NRX-A6 reactor-grade foil with images.
Date:
April 30, 1975
Creator:
Hengstenberg, T.F.
Object Type:
Report
System:
The UNT Digital Library
15-foot bubble chamber characteristics
Specifications, operation, characteristics, cost, and experience with the NAL 15-ft bubble chamber are described. Beam availability and some experimental proposals are discussed. (WHK)
Date:
September 15, 1975
Creator:
Huson, F. R.
Object Type:
Article
System:
The UNT Digital Library
15 MeV neutron damage in Cu and Nb
An investigation was made of high-energy neutron damage in Cu and Nb irradiated with approximately 15 MeV neutrons at the Oak Ridge Isochronous Cyclotron. The neutrons were generated by bombarding a thick Be target with 40- MeV deuterons resulting in a high energy neutron spectrum broadly peaked at 15 MeV. Single crystals of Cu and Nb were irradiated at room temperature to fluences of approximately 2 x 10$sup 17$ n/cm$sup 2$. The resulting loop-type defect clusters in the crystals were characterized using x-ray diffuse scattering and transmission electron microscopy. The cluster size distributions were found to be generally similar to those characteristic of fission neutron irradiations in these materials and no multiple clusters or sub-clusters were observed. Additional comparisons with fission reactor irradiations in Cu and Nb indicate that the retained displacement damage in these crystals is approximately 3 times greater for the high-energy neutrons than for an equivalent fluence of fission neutrons. This result is consistent with detailed damage energy calculations for the Be(d,n) neutron spectrum. (auth)
Date:
January 1, 1975
Creator:
Roberto, J. B.; Narayan, J. & Saltmarsh, M. J.
Object Type:
Article
System:
The UNT Digital Library
19 mm ballistic range: a potpourri of techniques and recipes
The expansion of ballistic gun range facilities at LLL has introduced state-of-the-art diagnostic techniques to glovebox-enclosed ballistic guns systems. These enclosed ballistic ranges are designed for the study of one- dimensional shock phenomena in extremely toxic material such as plutonium. The extension of state-of-the-art phtographic and interferometric diagnostic systems to glovebox-enclosed gun systems introduces new design boundaries and performance criteria on optical and mechanical components. A technique for experimentally evaluating design proposals is illustrated, and several specific examples (such as, target alignment, collateral shrapnel damage, and soft recovery) are discussed. (auth)
Date:
September 23, 1975
Creator:
Carpluk, G.T.
Object Type:
Article
System:
The UNT Digital Library
"48 Hours in Atoka"
Photograph of Freddy Weller and other performers at the 48 Hours in Atoka Concert, Atoka, OK. Photo by Fred W. Marvel, August 1975.
Date:
August 1975
Creator:
Marvel, Fred W.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
"48 Hours in Atoka"
Photograph of Progressive County Music singer Larry Gatlin, performing at the 48 Hours in Atoka Concert, Atoka, OK. Photo by Fred W. Marvel, August 1975.
Date:
August 1975
Creator:
Marvel, Fred W.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
"48 Hours in Atoka"
Photograph of Progressive County Music singer Larry Gatlin, performing at the 48 Hours in Atoka Concert, Atoka, OK. Photo by Fred W. Marvel, August 1975.
Date:
August 1975
Creator:
Marvel, Fred W.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
"48 Hours in Atoka"
Photograph of Freddy Weller and other performers at the 48 Hours in Atoka Concert, Atoka, OK. Photo by Fred W. Marvel, August 1975.
Date:
August 1975
Creator:
Marvel, Fred W.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
"48 Hours in Atoka"
Photograph of Progressive County Music singer Larry Gatlin, performing at the 48 Hours in Atoka Concert, Atoka, OK. Photo by Fred W. Marvel, August 1975.
Date:
August 1975
Creator:
Marvel, Fred W.
Object Type:
Photograph
System:
The Gateway to Oklahoma History