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Neutrino-Oscillation Experiments at Brookhaven National Laboratory
Two groups have submitted major proposals for neutrino oscillation searches at BNL. Both are two detector experiments with a close detector at approx. = 100m and a far detector at approx. = 900m. While the details of the experiments are quite different, both groups expect to obtain nu/sub ..mu../ disappearance limits of delta m/sup 2/sin2 theta approx. = 0.1 - 0.2 for small mass difference and sin/sup 2/2 theta at the few percent level for the most sensitive delta m/sup 2/(approx. = 25eV/sup 2/). Since both detectors are designed to identify electrons as well as muons they expect to obtain significant limits on nu/sub e/ appearance (nu/sub ..mu../ ..-->.. nu/sub e/). Each has received approval for a single detector (Phase I) experiment with the two detector phase (Phase II) still pending. The present status of the single detector experiments is detailed. (WHK)
Date:
January 1, 1983
Creator:
Ahrens, L. A.; Aronson, S. A.; Connolly, P. L.; Gibbard, B. G.; Maeda, Y.; Murtagh, M. J. et al.
Object Type:
Article
System:
The UNT Digital Library
Results on nu/sub. mu. /e Elastic Scattering
A measurement of the nu/sub ..mu../e elastic scattering cross section is presented. These data analyzed were run at the Brookhaven AGS wide band neutrino beam ((E/sub nu/) = 1.5 GeV).
Date:
January 1, 1983
Creator:
Ahrens, L. A.; Aronson, S. H.; Connolly, P. L.; Callas, J. L.; Cutts, D.; Amako, K. et al.
Object Type:
Article
System:
The UNT Digital Library
Particle ratios at high transverse momentum in pp collisions at. sqrt. s = 63 GeV and correlations between high p/sub T/ identified charged particles and associated identified charged particles
The production of identified charged particles in pp collisions at ..sqrt..s = 63 GeV with an identified high p/sub T/ trigger particle emitted in the central region is studied. The measurements were performed at the CERN ISR using the Axial Field Spectrometer. Trigger particle ratios, sigma(..pi../sup + -/)/ sigma(all/sup + -/), sigma(K/sup + -/) and sigma(p/sup + -/)/sigma(all/sup + -/) are presented for p/sub T/ from 5 GeV/c to 8 GeV/c. In addition sigma(..pi../sup + -/)/sigma(all/sup + -/) is presented in the p/sub T/ region from 2.5 GeV/c to 4.5 GeV/c. The charge compensation in the hemisphere containing the trigger particle is shown to depend strongly on the identity of the trigger particle and on the identity of the associated particles. 13 references.
Date:
January 1, 1983
Creator:
Akesson, T.; Albrow, M. G.; Almehed, S.; Batley, R.; Benary, O.; Boggild, H. et al.
Object Type:
Article
System:
The UNT Digital Library
Production of antihyperons in the central region at the ISR. The axial field spectrometer collaboration
We present measurements of the relative production cross-sections of anti p, anti ..lambda.., anti ..xi.., and anti ..cap omega.. at y approx. 0 for 1 less than or equal to p/sub T/ less than or equal to 2 GeV/c in pp collisions at ..sqrt..s = 63 GeV. The results are compared with previous measurements of antibaryon production in hadronic and e/sup +/e/sup -/ collisions.
Date:
July 1, 1983
Creator:
Akesson, T.; Albrow, M.C.; Almehed, S.; Batley, R.; Benary, O.; Boggild, H. et al.
Object Type:
Article
System:
The UNT Digital Library
Study of exclusive central hadron production at the ISR as a search for gluonium states: the axial field spectrometer collaboration
We present a preliminary report on a study of the exclusive reaction pp ..-->.. pph/sup +/h/sup -/ (h = ..pi..,K,p) at ..sqrt..s = 63 GeV and ..sqrt..s = 45 GeV, with h/sup +/ and h/sup -/ in the central region. This reaction has been suggested as a method of searching for gluonium states. The mass distributions in the ..pi../sup +/..pi../sup -/ system appear to be identical at the two values of ..sqrt..s. They show a rapid order of magnitude decrease in cross-section at 1000 MeV/c/sup 2/ and 1500 MeV/c/sup 2/. Further structure is observed above 2000 MeV/c/sup 2/.
Date:
January 1, 1983
Creator:
Akesson, T.; Albrow, M.G.; Almehed, S.; Batley, R.; Benary, O.; Boeggild, H. et al.
Object Type:
Article
System:
The UNT Digital Library
Properties of jets in high-E/sub T/ events produced in pp collisions at. sqrt. s = 63 GeV
The properties of jets in high-E/sub tau/ events produced in pp collisions at ..sqrt..s = 63 GeV have been studied at the CERN Intersecting Storage Rings. The fragmentation of the jets is found to be similar to that of jets produced in e/sup +/e/sup -/ annihilation. The jets are wider than calculated from a constituent scattering model with no hard bremsstrahlung component. The charge correlations of positive and negative particles show differences consistent with expectation from valence-quark scattering. 11 references.
Date:
July 1, 1983
Creator:
Akesson, T.; Albrow, M.G.; Almehed, S.; Batley, R.; Benary, O.; Boggild, H. et al.
Object Type:
Article
System:
The UNT Digital Library
Seismological investigation of crack formation in hydraulic rock-fracturing experiments and in natural geothermal environments. Progress report, September 1, 1982-August 31, 1983
Progress is reported on the following: interpretation of seismic data from the recent activities in Long Valley, California; theoretical study on a source model for the long-period events and volcanic tremor observed at Mount St. Helens; calculation of synthetic seismograms for the tremor source model; analysis of the Easter Island tremor records; testing and application of the Gaussian beam synthetic method to observations at Mount St. Helens; and field testing and development of a high-temperature borehole seismograph.
Date:
September 1, 1983
Creator:
Aki, K.
Object Type:
Report
System:
The UNT Digital Library
AACOG Region, Volume 10, Number 3, May 1983
Monthly newsletter of the Alamo Area Council of Governments describing news and events of relevance to the agencies.
Date:
May 1983
Creator:
Alamo Area Council of Governments
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
AACOG Region, Volume 10, Number 4, June 1983
Monthly newsletter of the Alamo Area Council of Governments describing news and events of relevance to the agencies.
Date:
June 1983
Creator:
Alamo Area Council of Governments
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
AACOG Region, Volume 10, Number 5, July 1983
Monthly newsletter of the Alamo Area Council of Governments describing news and events of relevance to the agencies.
Date:
July 1983
Creator:
Alamo Area Council of Governments
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
AACOG Region, Volume 10, Number 6, August 1983
Monthly newsletter of the Alamo Area Council of Governments describing news and events of relevance to the agencies.
Date:
August 1983
Creator:
Alamo Area Council of Governments
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Tritium waste disposal technology in the US
Tritium waste disposal methods in the US range from disposal of low specific activity waste along with other low-level waste in shallow land burial facilities, to disposal of kilocurie amounts in specially designed triple containers in 65' deep augered holes located in an aird region of the US. Total estimated curies disposed of are 500,000 in commercial burial sites and 10 million curies in defense related sites. At three disposal sites in humid areas, tritium has migrated into the ground water, and at one arid site tritium vapor has been detected emerging from the soil above the disposal area. Leaching tests on tritium containing waste show that tritium in the form of HTO leaches readily from most waste forms, but that leaching rates of tritiated water into polymer impregnated concrete are reduced by as much as a factor of ten. Tests on improved tritium containment are ongoing. Disposal costs for tritium waste are 7 to 10 dollars per cubic foot for shallow land burial of low specific activity tritium waste, and 10 to 20 dollars per cubic foot for disposal of high specific activity waste. The cost of packaging the high specific activity waste is 150 to 300 dollars per …
Date:
January 1, 1983
Creator:
Albenesius, E.L. & Towler, O.A.
Object Type:
Report
System:
The UNT Digital Library
Nevada Test Site seismic: telemetry measurements
The feasibility and limitations of surface-to-tunnel seismic telemetry at the Nevada Test Site were explored through field measurements using current technology. Range functions for signaling were determined through analysis of monofrequency seismic signals injected into the earth at various sites as far as 70 km (43 mi) from installations of seismometers in the G-Tunnel complex of Rainier Mesa. Transmitted signal power at 16, 24, and 32 Hz was measured at two locations in G-Tunnel separated by 670 m (2200 ft). Transmissions from 58 surface sites distributed primarily along three azimuths from G-Tunnel were studied. The G-Tunnel noise environment was monitored over the 20-day duration of the field tests. Noise-power probability functions were calculated for 20-s and 280-s seismic-record populations. Signaling rates were calculated for signals transmitted from superior transmitter sites to G-Tunnel. A detection threshold of 13 dB re 1 nm/sup 2/ displacement power at 95% reliability was demanded. Consideration of field results suggests that even for the frequency range used in this study, substantially higher signaling rates are likely to be obtained in future work in view of the present lack of information relevant to hardware-siting criteria and the seismic propagation paths at the Nevada Test Site. 12 references.
Date:
August 1, 1983
Creator:
Albright, J N; Parker, L E & Horton, E H
Object Type:
Report
System:
The UNT Digital Library
Status of the AGS polarized negative-ion source
Development of an intense polarized H/sup -/ source for the AGS continues at Brookhaven National Laboratory. Initial tests with about one milliampere, 40 keV pulsed neutral cesium beam, colliding with more than two milliampere polarized hydrogen atoms, produced about one-half microampere polarized negative ions, extracted at 20 keV. A new pulsed cesium source with an anticipated output of 5 to 15 mA and an improved neutralizer are under construction.
Date:
January 1, 1983
Creator:
Alessi, J.; Kponou, A.; Raymond, R. & Sluyters, T.
Object Type:
Article
System:
The UNT Digital Library
Ionization of polarized hydrogen atoms
Methods are discussed for the production of polarized H/sup -/ ions from polarized atoms produced in ground state atomic beam sources. Present day sources use ionizers of two basic types - electron ionizers for H/sup +/ Vector production followed by double charge exchange in a vapor, or direct H/sup -/ Vector production by charge exchange of H/sup 0/ with Cs/sup 0/. Both methods have ionization efficiencies of less than 0.5%. Ionization efficiencies in excess of 10% may be obtained in the future by the use of a plasma ionizer plus charge exchange in Cs or Sr vapor, or ionization by resonant charge exchange with a self-extracted D/sup -/ beam from a ring magnetron or HCD source. 36 references, 4 figures.
Date:
January 1, 1983
Creator:
Alessi, J.G.
Object Type:
Article
System:
The UNT Digital Library
Pulsed Cs beam development for the BNL polarized H/sup -/ source
A pulsed Cs/sup +/ beam has been developed for use on a polarized H/sup -/ source. Cesium ion production is by surface ionization using a porous tungsten ionizer. While satisfactory current pulses (5 to 10 mA greater than or equal to 0.5 ms) can be obtained, the pulse shapes are a sensitive function of the ionizer temperature and Cs surface coverage. The beam optical requirements are stringent, and the optics have been studied experimentally for both Cs/sup +/ and Cs/sup 0/ beams. Computer calculations are in good agreement with the observed results. The present source has delivered 2.6 mA of Cs/sup +/ through the interaction region of the polarized ion source, and as much as 2.0 particle mA of Cs/sup 0/. A new source is being built which is designed to give 15 mA through the interaction region.
Date:
January 1, 1983
Creator:
Alessi, J.G.
Object Type:
Article
System:
The UNT Digital Library
Ring-magnetron ionizer for polarized negative-ion sources
It has been realized for some time that the use of the charge exchange reaction of negative deuterium ions with polarized neutral hydrogen yielding neutral deuterium and polarized negative hydrogen ions to produce polarized H/sup -/ ions could be very efficient. While intense H/sup -//D/sup -/ ion sources exist, one encounters space charge problems when trying to put this scheme into practice. In this paper, a simple method, which uses a self-extracted D/sup -/ beam from a ring magnetron source, is proposed. The basic idea is presented, approximate numbers are given and the expected intensity is estimated. The method not only offers improvement in intensity, but equally important, improvements in reliability and lifetime.
Date:
January 1, 1983
Creator:
Alessi, J.G.; Sluyters, T. & Hershcovitch, A.
Object Type:
Article
System:
The UNT Digital Library
Preliminary investigation of interconnected systems interactions for the safety injection system of Indian Point-3
The rich diversity of ideas and techniques for analyzing interconnected systems interaction has presented the NRC with the problem of identifying methods appropriate for their own review and audit. This report presents the findings of a preliminary study using the Digraph Matrix Analysis method to evaluate interconnected systems interactions for the safety injection system of Indian Point-3. The analysis effort in this study was subjected to NRC constraints regarding the use of Boolean logic, the construction of simplified plant representations or maps, and the development of heuristic measures as specified by the NRC. The map and heuristic measures were found to be an unsuccessful approach. However, from the effort to model and analyze the Indian Point-3 safety injection system, including Boolean logic in the model, singleton and doubleton cut-sets were identified. It is recommended that efforts excluding Boolean logic and utilizing the NRC heuristic measures not be pursed further and that the Digraph Matrix approach (or other comparable risk assessment technique) with Boolean logic included to conduct the audit of the Indian Point-3 systems interaction study.
Date:
March 4, 1983
Creator:
Alesso, H.P.; Lappa, D.A.; Smith, C.F. & Sacks, I.J.
Object Type:
Report
System:
The UNT Digital Library
Some Scoping Experiments for a Space Reactor
Some scoping experiments were performed to evaluate fuel performance in a lithium heat pipe reactor operating at a nominal 1500K heat pipe temperature. Fuel-coolant and fuel-coolant-clad relationships showed that once a failed heat pipe occurs temperatures can rise high enough so that large concentrations of uranium can be transported by the vapor phase. Upon condensation this uranium would be capable of penetrating heat pipes adjacent to the failed pipe. The potential for propagation of failure exists with UO/sub 2/ and a lithium heat pipe. Changing the composition of the metal of the heat pipe would have only a second order effect on the kinetics of the failure mechanism. Uranium carbide and nitride were considered as potential fuels which are nonreactive in a lithium environment. At high temperatures the nitride would be favored because of its better compatibility with potential cladding materials. Compositions of UN with small additions of YN appear to offer very attractive properties for a compact high temperature high power density reactor.
Date:
July 7, 1983
Creator:
Alexander, C. A. & Ogden, J. S.
Object Type:
Report
System:
The UNT Digital Library
200 Sand Steamflood Demonstration Project. Sixth annual report, June 1981-June 1982
This demonstration project was initiated in the 200 Sand Pool in the Midway-Sunset Field, California Sand Pool to demonstrate the operational, recovery, and economic aspects of steamflooding a typical heavy oil reservoir which had unfavorable response to cyclic stimulation. The scope of the project involves 5 phases: (1) pilot site monitoring and evaluation; (2) pilot area expansion; (3) site selection for expansion to full-scale project; (4) expansion to full-scale steamflood; and (5) production monitoring. After expansion and steam injection for one year, the wells are averaging 8 B/D oil and 29 B/D water per well. This rate is above the 5 BOPD for cyclic stimulation. Most of the producing wells are steam stimulated about twice a year to enhance steam breakthrough from the continuous steam. The total area has averaged 319 B/D oil and 1233 B/D water the last year. 7 figures, 1 table.
Date:
August 1, 1983
Creator:
Alford, W.O.
Object Type:
Report
System:
The UNT Digital Library
Thomson-scattering measurements of electron temperature and density in a plasma channel created by a relativistic electron beam
The electron density (n/sub e/) and temperature (T/sub e/) of the plasma channel created by the propagation of a relativistic electron beam in air have been measured by a ruby laser Thomson scattering diagnostic. The measurements were made at the MIMI electron beam accelerator (1.6 MV, 21 kA, 70 ns) at various times during the plasma channel development, with 25 ns temporal resolution and 2 mm radial resolution. For example, in 5 Torr air, at the time of maximum electron beam current, the results are n/sub e/ = 1.86 x 10/sup 15/ cm/sup -3/ (+- 12%), T/sub e/ = 4.24 eV (+- 20%). These results, as well as those with other timing, are in good agreement with the theoretical results of the Air Propagation Code: n/sub e/ = 1.65 x 10/sup 15/ cm/sup -3/, T/sub e/ = 2.59 eV. Signal-to-noise is very good (10:1), limited by x-ray fluorescence of the fiber optics at the spectrometer. In fielding the diagnostic on higher energy accelerators, however, the dominant noise is expected to be the background light from the plasma and hot gas, or the fluorescence of the collecting optics. Improvements to the diagnostic and an ongoing experiment in 80 Torr of air, …
Date:
January 1, 1983
Creator:
Allen, G. R.; Parke Davis, H. & Brandenburg, J. E.
Object Type:
Report
System:
The UNT Digital Library
Damping ring rf system for SLC
The linear collider project at SLAC contains two damping rings to reduce the emittance of short electron or positron bunches which contain 5 x 10/sup 10/ particles per bunch. Two of these bunches are stored at a time and then extracted for acceleration in the collider. The rf system is subject to strong transients in beam loading. A computer model is used to optimize capture while minimizing rf power. The introduction of phase jump in the rf drive at injection time together with offsets in the tuning loops of the rf cavities when no beam is stored allows optimum performance under heavy beam load conditions. The rf system (800 kV at 714 MHz) for the electron damping ring has been built, tested and installed, and is being tested with beam.
Date:
January 1, 1983
Creator:
Allen, M. A.; Schwarz, H. D. & Wilson, P. B.
Object Type:
Article
System:
The UNT Digital Library
Optimum operating temperature for accelerator diskloaded waveguide: test results from Sector 2
To keep the accelerator structures in proper tuned condition with variable applied RF power, the Cu-temperature of the structures should be kept constant. From the specifications in CN 102, we derive that a ..delta../PHI/ = +-10/sup 0/ per ten-foot structure would be permissible to stay within a ..delta..E/E of 0.5%. Further measurements should be performed to prove that all structures stay within this limit under the SLC operating conditions where the average RF power level will be in the order of ten times the average power used for the present test.
Date:
September 23, 1983
Creator:
Allen, M.; Millich, A. & Schwarz, H.
Object Type:
Report
System:
The UNT Digital Library
Factors affecting storage of compressed air in porous-rock reservoirs
This report documents a review and evaluation of the geotechnical aspects of porous medium (aquifer) storage. These aspects include geologic, petrologic, geophysical, hydrologic, and geochemical characteristics of porous rock masses and their interactions with compressed air energy storage (CAES) operations. The primary objective is to present criteria categories for the design and stability of CAES in porous media (aquifers). The document will also describe analytical, laboratory, and field-scale investigations that have been conducted.
Date:
May 1, 1983
Creator:
Allen, R. D.; Doherty, T. J.; Erikson, R. L. & Wiles, L. E.
Object Type:
Report
System:
The UNT Digital Library