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Current status of the recirculator project at LLNL
The Heavy Ion Fusion Group at Lawrence Livermore National Laboratory has for several years been developing the world's first circular ion induction accelerator designed to transport space charge dominated beams. Currently, the machine extends to 90 degrees, or 10 half-lattice periods (HLP) with induction cores for acceleration placed on every other HLP. Full current transport with acceptable emittance growth without acceleration has been achieved. Recently, a time stability measurement revealed a 2% energy change with time due to a source heating effect. Correcting for this and conducting steering experiments has ascertained the energy to an accuracy of 0.2%. In addition, the charge centroid is maintained to within 0.6-mm throughout the bend section. Initial studies of matches dependencies on beam quality indicate significant effects.
Date:
March 23, 1999
Creator:
Ahle, L; Autrey, D; Barnard, J; Craig, G; Debeling, A; Eylon, S et al.
Object Type:
Article
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 90, No. 12, Ed. 1 Wednesday, March 23, 1994
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
March 23, 1994
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Oral History Interview with Gale E. Nevill, March 23, 1999
Access:
Use of this item is restricted to the UNT Community
Interview with Gale E. Nevill, a Army WWII veteran from Houston, Texas. Nevill discusses his family background and upbringing, jobs in the oil business, joining the National Guard, attending Rice University, getting commissioned, overseeing a Civilian Conservation Corps camp, working through the Depression, activation and assignment to 6th Army HQ, deployment to Brisbane, 6th Army operations in the South Pacific and Philippines, the end of the war and life afterwards.
Date:
March 23, 1999
Creator:
Alexander, William J. & Nevill, Gale Erwin
Object Type:
Book
System:
The UNT Digital Library
Technical review of the SWELL product. Second quarterly progress report
This progress report describes design and marketing efforts made to reduce the cost of the product, and reassess its market potential in light of reduced manufacturing costs and modified design. Marketing has looked at applications in agriculture, the turf grass industry, and golf coarse applications. The new controller offers energy efficiency in control of valves and minimization of costs associated with hard wired systems.
Date:
March 23, 1998
Creator:
Alexanian, G.
Object Type:
Report
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 126, Ed. 1 Tuesday, March 23, 1999
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 23, 1999
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
[Letter from Suzanne Antley to the Texas Human Rights Foundation Search Committee, March 23, 1992]
Letter from Suzanne Antley to the Search Committee of the Texas Human Rights Foundation discussing the open position of litigator at the foundation. Also contained in the document is Antley's resume.
Date:
March 23, 1992
Creator:
Antley, Suzanne
Object Type:
Letter
System:
The Portal to Texas History
[2012.201.B0931.0661]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Dr. David and Linda Newsome are shown with one of Linda's Belgian sheep dogs." Image is a color image of a man wearing a short sleeved button down shirt and tie kneeling next to a doctors bag and wearing a stethoscope. Between him and a crouching woman wearing a blue sweater is a light brown furry puppy. Behind in the back of the scene is a van that has a sign on the side reading "House Calls - Hospital Care - Dogs and Cats" with a phone number.
Date:
March 23, 1992
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0151.0244]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Scout leader Jim Curtis is the center of attention as he starts on of several races."
Date:
March 23, 1992
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0349.0411]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
March 23, 1992
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0383.0160]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Everett Roberts, left, and Norman DeBoard digest their lunch and the weekly news on a sidewalk bench."
Date:
March 23, 1995
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0956.0242]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Kelli Black and her classmates in Caney Valley Elementary School easily find their town- but no road on the state map."
Date:
March 23, 1991
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1080.0098]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The red Cross provides many services to those in time of disaster."
Date:
March 23, 1994
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1089.0021]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Indian artist Leonard Riddles pauses atop a ladder in the Waiters depot befor his fresco panel featuring Theodore Roosevelt, wolf-wrestler Jack Abernathy and Quanah Parker."
Date:
March 23, 1990
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1299.0894]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
March 23, 1990
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1299.0895]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Miss America Debbye Turner autographs pictures for Penn Square Mall Shoppers Saturday."
Date:
March 23, 1990
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1349.0032]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
March 23, 1990
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Two-dimensional ferromagnetic correlations above Tc in the Naturally layered CMR manganite La{sub 2-2x}Sr{sub 1+2x}Mn{sub 2}O{sub 7} (x = 0.3-0.4).
Neutron diffuse scattering in the form of rod-like features are observed in single crystals of the layered CMR material La{sub 2{minus}2x}Sr{sub 1+2x}Mn{sub 2}O{sub 7} (x=0.4,0.36), consistent with the presence of 2D ferromagnetic spin correlations. These diffuse features are observed over a wide temperature region, however, their coherence length does not appear to diverge at T{sub c}, although there is evidence of the development of three-dimensional correlations around ferromagnetic reflections of the 3D-ordered magnetic structure close to T{sub c}. Quasi-elastic neutron scattering on a ceramic sample of x = 0.3 shows that the lifetime of these ferromagnetic correlations increases at T {r_arrow} T{sub c}. They exhibit a spin-diffusion constant above T{sub c} of {approximately}5 meV {angstrom}{sup 2}, much lower than that reported for La{sub 2/3}Ca{sub 1/3}MnO{sub 3}. We discuss the relationship of these magnetic correlations to models of the ferromagnetic transition in CMR compounds.
Date:
March 23, 1998
Creator:
Argyriou, D. N.
Object Type:
Article
System:
The UNT Digital Library
Vertical Array Receptions of the Heard Island Transmissions
None
Date:
March 23, 1993
Creator:
Baggeroer, A. B.; Lashkari, K.; Chiu, Ching-sang; Miller, J. H.; Mikhalevsky, P. & von der Heydt, K.
Object Type:
Report
System:
The UNT Digital Library
Effects of Hydrogen in the Annealing Environment on Photoluminescence from Si Nanoparticles in SiO(2)
The role of hydrogen in enhancing the photoluminescence (PL) yield observed from Si nanocrystals embedded in SiO{sub 2} has been studied. SiO{sub 2} thermal oxides and bulk fused silica samples have been implanted with Si and subsequently annealed in various ambients including hydrogen or deuterium forming gases (Ar+4%H{sub 2} or Ar+4%D{sub 2}) or pure Ar. Results are presented for annealing at temperatures between 200 and 1100 C. Depth and concentration profiles of H and D at various stages of processing have been measured using elastic recoil detection. Hydrogen or deuterium is observed in the bulk after annealing in forming gas but not after high temperature (1100 C) anneals in Ar. The presence of hydrogen dramatically increases the broad PL band centered in the near-infrared after annealing at 1100 C but has almost no effect on the PL spectral distribution. Hydrogen is found to selectively trap in the region where Si nanocrystals are formed, consistent with a model of H passivating surface states at the Si/SiO{sub 2} interface that leads to enhanced PL. The thermal stability of the trapped H and the PL yield observed after a high temperature anneal have been studied. The hydrogen concentration and PL yield are unchanged …
Date:
March 23, 1999
Creator:
Barbour, J. C.; Budai, J. D.; Hembree, D. M.; Meldrum, A.; White, C. W. & Withrow, S. P.
Object Type:
Article
System:
The UNT Digital Library
News Bulletin (Castroville, Tex.), Vol. 36, No. 12, Ed. 1 Thursday, March 23, 1995
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
March 23, 1995
Creator:
Barnes, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Frequency Interactions to Explain Madden Julian Oscillations and Intra Seasonal Oscillations.
None
Date:
March 23, 1998
Creator:
Barr-Kumarakulasinghe, S. A.
Object Type:
Article
System:
The UNT Digital Library
Gms-5 Ir and Visible Imagery for November 1996-February 1997 From the Arm External Data Center.
None
Date:
March 23, 1998
Creator:
Barr-Kumarakulasinghe, S. A.
Object Type:
Article
System:
The UNT Digital Library
ON THE INSTABILITY OF TROPICAL WESTERN PACIFIC WARM POOL DURING THE BOREAL WINTER AND SPRING
A source of instability in the western Pacific warm pool is shown to be due to sea surface elevation variations caused by changes in the zonal sea-surface temperature (SST) gradient and the changes in the Pacific Ocean basin length in relation to the warm pool latitudinal location. The variation of the sea-surface elevation is measured by using the thermocline depth response calculated from a two-layer ocean. The warm pool is shown to be barely at equilibrium during the boreal late winter and early spring by comparing the measured thermocline at 110{degree}W, 0{degree}E with the calculated thermocline depth. Based on this analysis, a failure or reversal of the climatological zonal winds are apparently not a necessary precursor for the instability of the warm pool and initiation of a warm event. A warm event can be initiated by an increase in the size of the warm pool and/or an increase in zonal SST differences during the boreal/winter spring. This mechanism could be an alternate mechanism for El-Nino Southern Oscillation (ENSO) dynamics to that postulated by Bjeknes (1969).
Date:
March 23, 1998
Creator:
Barr-Kumarakulasinghe, S. A.
Object Type:
Article
System:
The UNT Digital Library
Theoretical hyperfine structure constants for transition metal atoms and ions
Accurate calculation of hyperfine structure of (d+s)[sup n] states involves dealing with both relativistic and correlation effects in a multi-reference framework (all (d+s)[sup n] states of fixed n,J treated at once). The algorithms were improved (BCB and REDUCE methods) and applied to the hfs of Zr II for (d+s)[sup 3] states. The fs intervals were determined to within 0.075 eV, and the hfs was only 17% in error; this represents the first time that all of the (d+s)[sup n] fs levels have been accurately determined by ab initio theory. Calculations for Nb III, La I, and Hf II [J=1.5] will be published when the J=0.5 calculations are complete. 9 refs, 1 tab.
Date:
March 23, 1993
Creator:
Beck, D. R.
Object Type:
Report
System:
The UNT Digital Library