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Probing the possibility of a /sup 12/C/sup 13/C abundance gradient from observations of interstellar CH/sup +/

Description: I have performed high signal-to-noise (SN /equals/ 300 to 500) observations of interstellar CH/sup /plus// at Lick Observatory and at CTIO of the reddened, early-type stars HD 183143, HD 24432, and HD 157038 in an effort to probe the existence of a /sup 12/C/sup 13/C abundance gradient in our Galaxy.
Date: September 16, 1987
Creator: Hawkins, I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

[Letter from Barbara Jungjohan to the Student Life Committee, September 16, 1987]

Description: Letter from Barbara Jungjohan to the members of the Student Life Committee, on September 16, 1987, thanking them for spending time with Dr. Julian C. Stanley. She encloses some materials Stanley thought might be helpful, and clears up a mistaken impression she gave at the last meeting.
Date: September 16, 1987
Creator: Jungjohan, Barbara
Item Type: Refine your search to only Letter
Partner: Texas Academy of Mathematics and Science
open access

[Letter from Alfred Hurley to James R. Miller, June 16, 1987]

Description: Letter from Alfred Hurley to James R. Miller inviting him to the signing of the bill that will establish the Texas Academy of Mathematics and Science at North Texas State University, and to a luncheon being held by Hurley and his wife in Austin before the ceremony.
Date: June 16, 1987
Creator: Hurley, Alfred F.
Item Type: Refine your search to only Letter
Partner: Texas Academy of Mathematics and Science
open access

Demountable vacuum seals for fusion reactor applications

Description: Demountable vacuum seals for fusion reactor applications must be compatible with the reactor environment, easily scalable, very reliable and readily maintained by remote handling methods. We are investigating gate valves as well as flanges in our efforts to provide such seals. They are all metal and scalable without becoming massive and require no axial fasteners. Preliminary tests on an initial 30 cm aluminum flange using no soft metal coatings or gaskets have given several vacuum tight closur… more
Date: October 16, 1987
Creator: Batzer, T. H. & Call, W. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Overview of the TIBER II (Tokamak Ignition/Burn Experimental Reactor) design

Description: The TIBER II Tokamak Ignition/Burn Experimental Reactor design is the result of efforts by numerous people and institutions, including many fusion laboratories, universities, and industries. While subsystems will be covered extensively in other reports, this overview will attempt to place the work in perspective. Major features of the design are compact size, low cost, and steady-state operation. These are achieved through plasma shaping and innovative features such as radiation tolerant magnet… more
Date: October 16, 1987
Creator: Henning, C. D. & Logan, B. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The need for a fusion technology information program

Description: In providing an adequate energy technology for the future, which new programs should be considered by the Department of Energy national laboratories to ensure that the US remains in the forefront of international science and technology is an important question. This paper suggests that the urgency for energy independence demands an active communication program that would increase awareness of energy as a critical national issue and would present fusion, with its benefits and risks, as one of th… more
Date: June 16, 1987
Creator: Correll, D.L. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Inferences drawn from shock-enhanced turbulent mixing analyses

Description: This discussion concerns analyses of physical shock-tube and shock-boundary layer interaction experiments, supplemented by computations. The basic issue is that of evaluating the influence of reflected shock waves on enhancing the balance of turbulent kinetic energy and resultant turbulent materials mixing during implosion and shock reflection intervals. Increases in random velocity amplitudes of a factor of 5 or greater implying turbulent kinetic energy increases of a factor of 12 or more have… more
Date: October 16, 1987
Creator: Buckingham, A.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The edge plasma and divertor in TIBER

Description: An open divertor configuration has been adopted for TIBER. Most recent designs, including DIII-D, NET and CIT use open configurations and rely on a dense edge plasma to shield the plasma from the gas produced at the neutralizer plate. Experiments on ASDEX, PDX, D-III, and recently on DIII-D have shown that a dense edge plasma can be produced by re-ionizing most of the gas produced at the plate. This high recycling mode allows a large flux of particles to carry the heat to the plate, so that the… more
Date: October 16, 1987
Creator: Barr, W.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Plasma parameters for alternate operating modes of TIBER-II

Description: Parameters for operating points of TIBER-II, different from the baseline steady-state operation, are presented. These results have been generated with the MUMAK tokamak power balance code. Pulsed ignited and high performance steady-state operating points are described. 20 refs.
Date: October 16, 1987
Creator: Fenstermacher, M. E.; Devoto, R. S.; Logan, B. G. & Perkins, L. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

TIBER II (Tokamak Ignition/Burn Experimental Reactor) parameters with neutral beams at high energies

Description: The baseline neutral beam energy for TIBER II was chosen to be 500 keV consistent with the use of near term dc acceleration technology. Adequate penetration to the axis for core current drive in larger ETR devices requires higher beam energies. However, beam instabilities may limit the current drive efficiency at high energy to lower values than predicted classically. The characteristics of TIBER II and a device with 4.5 m major radius as functions of beam energy are presented. 11 refs.
Date: October 16, 1987
Creator: Devoto, R. S.; Fenstermacher, M. E. & Papanikolaou, P. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Microwave Superheaters for Fusion

Description: The microwave superheater uses the synchrotron radiation from a thermonuclear plasma to heat gas seeded with an alkali metal to temperatures far above the temperature of material walls. It can improve the efficiency of the Compact Fusion Advanced Rankine (CFAR) cycle described elsewhere in these proceedings. For a proof-of-principle experiment using helium, calculations show that a gas superheat ..delta..T of 2000/sup 0/K is possible when the wall temperature is maintained at 1000/sup 0/K. The … more
Date: October 16, 1987
Creator: Campbell, R. B.; Hoffman, M. A. & Logan, B. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The ORNL beamline at the National Synchrotron Light Source

Description: The Oak Ridge National Laboratory's (ORNL) beamline at the National Synchrotron Light Source (NSLS) incorporates several novel features including x-ray optics based on sagittal focusing with crystals and a cantilevered mirror whose center becomes the pivot for all downstream optical elements. Crystal focusing accepts a much larger horizontal divergence of radiation than a mirror while maintaining excellent momentum transfer and energy resolution. This sagittally bent crystal serves as the secon… more
Date: June 16, 1987
Creator: Habenschuss, A.; Ice, G. E.; Sparks, C. J. & Neiser, R. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ICF special studies: Final report

Description: This paper summarizes the work completed by W.J. Schafer Associates for Lawrence Livermore National Laboratory in the area of Inertial Confinement Fusion. The SAFIRE (Systems Analysis Code for ICF Reactor Economics) code is one of the major tasks discussed. (LSP)
Date: September 16, 1987
Creator: Meier, W. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Transient analysis of a coupled accelerator and decelerator system

Description: For an energy-efficient accelerator system to be used for a free-electron laser, the stability of an energy-recovery system utilizing a bridge coupler placed between the accelerator and the decelerator is studied numerically. Energy is recovered by recirculating the accelerated electron beam through the decelerator; the recovered energy is then transported through the bridge coupler to the accelerator. The calculation shows that a large transient voltage oscillation is induced in the system. Th… more
Date: March 16, 1987
Creator: Takeda, Harunori
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chromosomal replicons of higher plants

Description: This brief discussion of replicons of higher plants offers a glimpse into the properties of chromosomal DNA replication. It gives evidence that the S phase of unrelated plant species is comprised of temporally ordered replicon families that increase in number with genome size. This orderly process, which assures a normal inheritance of genetic material to recipient daughter cells, is maintained at the level of replicon clusters by two mutually exclusive mechanisms, one involving the rate at whi… more
Date: March 16, 1987
Creator: Van't Hof, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Computer simulation of the lasertron with a ring model

Description: The lasertron is more efficient, lighter, and smaller than a klystron, especially at outputs below 2 GHz. Higher peak output powers are possible with the lasertron, and a separate modulator is not required. These advantages are useful for rf accelerators and linear colliders. The electron dynamics are simulated to estimate the device performance limits and to design an experimental lasertron. The relativistic electron dynamics are followed from the photocathode through the acceleration region a… more
Date: March 16, 1987
Creator: Tallerico, P.J. & Coulon, J.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Mechanical design and fabrication of a 425-MHz H/sup -/ buncher

Description: A beam buncher has been designed, fabricated, and installed on the accelerator test stand (ATS) to match the 2-MeV output beam of a 425-MHz H/sup -/ radio-frequency quadrupole (RFQ) into a 425-MHz drift-tube linac (DTL). The buncher configuration provides integral-matching permanent-magnet quadrupoles (PMQ) at the exit of the RFQ and one ..beta..lambda across the buncher accelerating gap; a third PMQ is the first DTL half-cell magnet. Located between the second and third PMQs is a 50-..cap omeg… more
Date: March 16, 1987
Creator: Wilson, N.G. & Precechtel, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

CC Cryostat Cooldown Test Results

Description: A cooldown of the inner vessel of the Central Calorimeter cryostat to 77K was performed during the week of October 12 in order to 'cold shock' it, i.e., to check for insulating vacuum integrity with the inner vessel cold. The conclusion from our test results is that the vessel withstood the cold shock, and the insulating vacuum remained good. Cooldown was analyzed by J.D. Fuerst in D0 note 3740.000-EN-107, dated August 19. Warmup was analyzed by T. Peterson and B.Fitzpatrick in D0 Engineering N… more
Date: October 16, 1987
Creator: Peterson, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Homebuilders]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 6pm.
Date: January 16, 1987, 6:00 p.m.
Duration: 1 minute 09 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
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