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A microwave power driver for linac colliders: Gigatron

Description: The gigatron is a new rf amplifier tube designed for linac collider applications. Three design features permit extension of the lasertron concept to very high frequencies. First, a gated field-emitter array is employed for the modulated cathode. Second, a ribbon beam geometry mitigates space charge depression and facilitates efficient output coupling. Third, a traveling wave output coupler is used to obtain optimum coupling to the ribbon beam. This paper describes recent developments in the gig… more
Date: November 18, 1988
Creator: Bizek, H.M.; Elliott, S.M.; McIntyre, P.M.; Nassiri, A.; Popovic, M.B.; Raparia, D. et al.
Partner: UNT Libraries Government Documents Department
open access

The QCD vacuum at infinite momentum

Description: We outline how ''topological confinement'' can be seen by the analysis of Regge limit infra-red divergences. We suggest that it is a necessary bridge between conventional confinement and the parton model at infinite momentum. It is produced by adding a chiral doublet of color sextet quarks to conventional QCD. An immediate signature of the resultant electroweak symmetry breaking would be large cross-sections for W/sup +/W/sup /minus// and Z/sup 0/Z/sup 0/ pairs at the CERN and Fermilab /bar p/p… more
Date: November 18, 1988
Creator: White, A.R.
Partner: UNT Libraries Government Documents Department
open access

Statistical properties of cellular automata in the context of learning and recognition: Part 2, inverting local structure theory equations to find cellular automata with specified properties

Description: This is the second of two lectures. In the first lecture the map from a cellular automaton to a sequence of analytical approximations called the local structure theory was described. In this lecture the inverse map from approximation to the class of cellular automata approximated is constructed. The key matter is formatting the local structure theory equations in terms of block probability estimates weighted by coefficients. The inverse mapping relies on this format. Each possible assignment of… more
Date: November 18, 1988
Creator: Gutowitz, H.A.
Partner: UNT Libraries Government Documents Department
open access

Rotating liquid blanket with no first wall for fusion reactors

Description: A toroidal vortex of liquid FLiBe (LiF + BeF/sub 2/) is suggested for the blanket of a fusion reactor. Because this reactor chamber has no solid first wall, it might avoid many of the problems that accompany conventional blanket design. The liquid blanket is sustained by nozzles that inject a continuous layer of cool liquid on the inner surface. A second set of nozzles sends a stream of droplets across the diverted scrape-off layer or edge plasma to carry its heat away. The feasibility issues o… more
Date: November 18, 1988
Creator: Moir, Ralph W.
Partner: UNT Libraries Government Documents Department
open access

Development and tests of an anode readout TPC with high track separability for large solid angle relativistic ion experiments

Description: We have developed, constructed and tested an anode readout TPC with high track separability which is suitable for large solid angle relativistic ion experiments. The readout via rows of short anode wires parallel to the beam has been found in tests to allow two-track separability of approx.2-3 mm. The efficiency of track reconstruction for events from a target, detected inside the MPS 5 KG magnet, is estimated to be >90% for events made by incident protons and pions. 15 GeV/c x A Si ion beams a… more
Date: July 18, 1988
Creator: Lindenbaum, S. J.; Foley, K. J.; Eiseman, S. E.; Etkin, A.; Hackenburg, R. W.; Longacre, R. S. et al.
Partner: UNT Libraries Government Documents Department
open access

ITER pellet fueling

Description: This paper discusses: ITER fueling issues; ITER pellet sizes, ablation and penetration; and ITER pellet injector requirements. 5 refs., 6 figs.
Date: June 18, 1988
Creator: Houlberg, W.A.
Partner: UNT Libraries Government Documents Department
open access

In-beam studies of sup 96 Zr and sup 98 Zr: Collective excitations

Description: Nearly two decades ago signatures of deformation in the ground state bands of {sup 100}Zr and {sup 102}Zr were identified, and the rapid change in the deformation of heavy zirconium nuclei noted. It is now well accepted that the short-range proton-neutron interaction between the 1g{sub 9/2} and 1g{sub 7/2} spin-orbit partners plays an important role in producing ground state deformation in this region. Nevertheless, recent studies of zirconium nuclei, including those in the transition region, c… more
Date: April 18, 1988
Creator: Henry, E. A.; Meyer, R. A.; Aprahamian, A.; Mann, L. G.; Roy, N. (Lawrence Livermore National Lab., CA (USA)) & Maier, K. H. (Hahn-Meitner-Institut fuer Kernforschung Berlin G.m.b.H. (Germany, F. R.))
Partner: UNT Libraries Government Documents Department
open access

The new radiation dosimetry for the A-bombs in Hiroshima and Nagasaki

Description: Extensive work has been conducted over the past few years to reassess all aspects of the radiation dosimetry for the A-bombs in Hiroshima and Nagasaki. This work has included reviews of the bomb yields, source terms, air transport of neutrons and gamma rays, neutron-induced radioactivity and thermoluminescence in exposed materials, shielding of individuals by buildings, and calculations of organ doses. The results of these theoretical and experimental activities have led to the development of a… more
Date: August 18, 1988
Creator: Kerr, George D.
Partner: UNT Libraries Government Documents Department
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