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Status and aims of the DUMAND neutrino project: the ocean as a neutrino detector

Description: The possibility of using the ocean as a neutrino detector is considered. Neutrino-produced interactions result in charged particles that generate Cherenkov radiation in the water, which can be detected by light-gathering equipment and photomultipliers. The properties of the ocean as seen from this standpoint are critically examined, and the advantages and disadvantages pointed out. Possible uses for such a neutrino detector include (1) the detection of neutrinos emitted in gravitational collapse of stars (supernova production), not only in our own galaxy, but in other galaxies up to perhaps twenty-million light-years away, (2) the extension of high-energy neutrino physics, as currently practiced up to 200 GeV at high-energy accelerators, to energies up to 50 times higher, using neutrinos generated in the atmosphere by cosmic rays, and (3) the possible detection of neutrinos produced by cosmic-ray interactions outside the earth's atmosphere. The technology for such an undertaking seems to be within reach.
Date: July 1, 1976
Creator: Roberts, A.; Blood, H.; Learned, J. & Reines, F.
Partner: UNT Libraries Government Documents Department

Technology of producing reliable superconducting dipoles at Fermilab

Description: During the last few months, several full size prototype dipole magnets for the Fermilab Energy Doubler were successfully tested. This was the result of several concurrent programs in conductor development as well as magnet construction, production, and testing. The present magnets have achieved their design goal. Progress to this point has solved many pitfalls. A description is given of the present technology as well as some of the decisions that led to the present design.
Date: January 1, 1976
Creator: Fowler, W. B.; Livdahl, P. V. & Tollestrup, A. V.
Partner: UNT Libraries Government Documents Department

Effects limiting accelerated beam intensity in the largest proton synchrotron

Description: The two major categories of beam-dynamical considerations in designing very large proton synchrotrons that bear direct relation to the ultimate beam intensity achievable are discussed. It is assumed that in all future multi-TeV proton synchrotrons, limitations of physical size and electric-power consumption will necessitate the use of superconducting magnets. The relatively large field errors encountered in these magnets demand a closer re-examination of single-particle dynamics. In addition, the extensively investigated self-field effects will be present and will be equally important at beam currents similar to those in smaller accelerators. A third major consideration that may also limit the attainable intensity is the effect of stray beam striking superconducting magnets and causing them to quench.
Date: January 1, 1977
Creator: Teng, L. C.
Partner: UNT Libraries Government Documents Department

Direct production of muons in the forward direction by 300-GeV protons on uranium

Description: An experiment involving direct production of muons by 300 GeV protons on uranium was undertaken in order to determine if the ..mu../..pi.. ratio of 10/sup -4/ is consistent with the idea that the muons are decay products of massive mesons. Processes such as vector meson decay and Bethe--Heitler conversions of photons contribute about 20 percent to the measured signal. The interpretation of the excess signal is not definite. (SDF)
Date: January 1, 1976
Creator: Johnson, R.; Buchholz, D.; Fackler, O.; Frisch, H. J.; Segler, S. L.; Shochet, M. J. et al.
Partner: UNT Libraries Government Documents Department

Fermilab accelerator: status and development plans

Description: The Fermilab accelerator has been in operation since 1972. The first operation was at 200 GeV, although the energy was soon raised to a nominal value of 300 GeV. Since July 1975, 400 GeV has been the normal energy. The machine was operated at 500 GeV in May 1976. The accelerator system is composed of a 750-kV Cockcroft--Walton, a 200-MeV linac, an 8-GeV to 15-Hertz booster, and a 500-GeV main ring. The linac injects one pulse into the booster and the booster injects the 8-GeV pulse into the main ring, each using single-turn injection. This process is repeated 13 times to fill the main ring circumference before accelertion begins. A switchyard system splits the extracted beam to 6 different external targets. There is one internal target area with 3 possible targets. The linac can also deliver a 66-MeV beam to a neutron cancer therapy facility and a 200-MeV proton beam to a radiography experiment. A project is being initiated to study electron cooling of 200-MeV protons. Upon successful cooling of protons, studies will begin on the cooling and accumulation of antiprotons. The antiprotons would be injected into the main ring and simultaneously accelerated with protons to produce antiproton-proton colliding beams. Work is in progress at Fermilab on the construction of a 1000-GeV superconducting Energy Doubler/Saver to be installed in the present main-ring tunnel. With both the main ring and energy doubler in the same tunnel, it is obvious proton--proton colliding beams will be possible. The complete system of 1000-GeV fixed-target physics, 250 GeV (main ring) x 1000 GeV (doubler) proton--proton physics and 1000 GeV x 1000 GeV proton--antiproton physics in the doubler has been named the Tevatron.
Date: January 1, 1977
Partner: UNT Libraries Government Documents Department

Measurements of magnet quench levels induced by proton beam spray

Description: A superconducting dipole magnet was installed in the Fermilab primary beam line. Targets were inserted in the proton beam upstream of the magnet and measurements made of the energy deposition within the magnet sufficient to cause quenching. The quench levels were 25 mW/g for 1 s beam spill and 1 mJ/g for a spill of 1 ms or less. In comparison, the energy deposition at the extraction septum was 0.6 mJ/g.
Date: January 1, 1976
Creator: Edwards, H.; Rode, C. & McCarthy, J.
Partner: UNT Libraries Government Documents Department

Results of the Fermilab wire production program

Description: In examining the various schedules of wire drawing and heat treating, the Critchlow type of schedule provided the highest and most uniform data from billet to billet. It consists of a long anneal at 400 +- 20/sup 0/C at a cold work point giving about 99 percent reduction in area from the extrusion size. Several quick copper anneals at 300/sup 0/C may be interspersed to aid in fabrication. A final anneal at finished size both peaks up the resistivity ratio of the copper as well as the critical current of the alloy by moving dislocations to subcell walls. Using this method, critical currents of 1.7 x 10/sup 5/ A/cm/sup 2/ could be maintained in all billets. The copper cladding and sinking method looks promising and should save production costs. In spite of this, it was important to attain good packing density in the billets to assure uniform filament pattern and reduce breakage in wire drawing. Overall, a procedure was found for fabricating wire in large production lots that would be acceptable for constructing dipole magnets. It is felt that this method could be peaked up with time.
Date: January 1, 1976
Creator: Strauss, B. P.; Remsbottom, R. H.; Reardon, P. J.; Curtis, C. W. & McDonald, W. K.
Partner: UNT Libraries Government Documents Department

Quench development in magnets made with multifilamentary NbTi cable

Description: An experimental study of the normal zone propagation and total resistance as a function of time is described. The normal zone propagation velocity in a single strand was measured as a function of both current and magnetic field with particular interest in the neighborhood of the short sample limit. The study proceeded from measurements in single multifilamentary strands to measurements in 23 strand cables under different cooling environments to final measurements in actual ramping dipole magnets made with this cable. Interpretation of the results led to the determination of safety limits for the Energy Doubler/Saver magnets and to safeguards implemented by an energy dumping circuit which effectively protects these magnets from self-destruction.
Date: January 1, 1976
Creator: Flora, R. H.; Kuchnir, M. & Tollestrup, A. V.
Partner: UNT Libraries Government Documents Department

Electron--proton interactions at ISABELLE. [Possible experimental parameters, 400 GeV, cross sections, kinematics]

Description: A calculation of kinematics and cross sections is done for an investigation of the physics possibilities specific to the study of weak interactions in electron-proton interactions at Isabelle at 400 GeV, with an electron/positron storage ring of 20 GeV. (JFP)
Date: August 30, 1977
Creator: Limon, P.J. & Humphrey, J.W.
Partner: UNT Libraries Government Documents Department

Unitary coupled channel deck model

Description: A unitary Deck model with coupled K*..pi.. and Krho channels, including only one resonance in the Q region is constructed. Adjusting the resonance parameters, one achieves a satisfactory description of the experimental phase variations and structure in the mass spectra. The resonance is determined to belong to the J/sup PC/ = 1/sup + -/ SU(3) octet, and is thus the Q/sub B/. The relative coupling strength K*..pi../Krho is approximately 2/3.
Date: May 1, 1976
Creator: Basdevant, J. L. & Berger, E. L.
Partner: UNT Libraries Government Documents Department

TRANSPORT: a computer program for designing charged particle beam transport systems

Description: TRANSPORT is a first- and second-order matrix multiplication computer program intended for the design of static-magnetic beam transport systems. It has been in existence in various evolutionary versions since 1963. The present version, described in the manual given, includes both first- and second-order fitting capabilities. TRANSPORT will step through the beam line, element by element, calculating the properties of the beam or other quantities, described below, where requested. Therefore one of the first elements is a specification of the phase space region occupied by the beam entering the system. Magnets and intervening spaces and other elements then follow in the sequence in which they occur in the beam line. Specifications of calculations to be done or of configurations other than normal are placed in the same sequence, at the point where their effect is to be made.
Date: May 1, 1977
Creator: Brown, K. L.; Rothacker, F.; Carey, D. C. & Iselin, C.
Partner: UNT Libraries Government Documents Department