Search Results - "Mihalczo, J."

Subcritical reactivity monitoring in accelerator driven systems by Muñoz-Cobo, J.L., Rugama, Y., Valentine, T.E., Mihalczo, J.T., Perez, R.B.

“…In this paper, an absolute measurements technique for the subcriticality determination is presented. The development of accelerator driven systems (ADS)…”
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Physical description of nuclear materials identification system (NMIS) signatures by Mihalczo, J.T, Mullens, J.A, Mattingly, J.K, Valentine, T.E

“…This paper describes all time and frequency analysis parameters measured with a new correlation processor (capability up to 1 GHz sampling rates and up to five…”
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NMIS plus gamma spectroscopy for attributes of HEU, PU and HE detection by Mihalczo, J.T., Mattingly, J.K., Neal, J.S., Mullens, J.A.

“…A combined nuclear materials identification system–gamma ray spectrometry system can be used passively to obtain the following attributes of Pu: presence,…”
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Fast coincidence counting with active inspection systems by Mullens, J.A., Neal, J.S., Hausladen, P.A., Pozzi, S.A., Mihalczo, J.T.

“…This paper describes 2nd and 3rd order time coincidence distributions measurements with a GHz processor that synchronously samples 5 or 10 channels of data…”
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Delayed critical ORNL unreflected uranium (93.20) metal sphere and the pure unreflected uranium (93.80) sphere critical mass by Mihalczo, J.T., Lynn, J.J., Taylor, J.R., Hansen, G.E., Pelowitz, D.B.

“…A spherical critical assembly of unreflected and unmoderated uranium (93.20 wt.% 235U) metal was assembled at the Oak Ridge Critical Experiments Facility in…”
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MCNP-DSP: A neutron and gamma ray Monte carlo calculation of source-driven noise-measured parameters by Valentine, T.E., Mihalczo, J.T.

“…The 252Cf-source-driven noise analysis measurement method was developed to determine the subcriticality and other properties of configurations of fissile…”
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Stochastic transport theory of neutron and photon coupled fields: neutron and photon counting statistics in nuclear assemblies by Munoz-Cobo, J L, Perez, R B, Valentine, TE, Rugama, Y, Mihalczo, J T

“…The behavior of neutrons and gamma rays in a nuclear reactor or configuration of fissile material can be represented as a stochastic process. The observation…”
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A novel method for determining pulse counting circuitry dead time using the Nuclear Weapons Inspection System by Paulus, M.J., Mihalczo, J.T., Valentine, T.E., Mullens, J.A., Breeding, J.E., Uckan, T., Mattingly, J., Turner, G., Smith, M.C., McEvers, J.A.

“…A novel method for measuring dead time in nuclear pulse processing circuitry has been developed using the autocorrelation measurement capability of the Nuclear…”
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Portable fast-neutron radiography with the nuclear materials identification system for fissile material transfers by Hausladen, P.A., Bingham, P.R., Neal, J.S., Mullens, J.A., Mihalczo, J.T.

“…The nuclear materials identification system (NMIS) has historically been used with a 252Cf source for bulk interrogation of highly enriched uranium and…”
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High-efficiency scintillation detector for thermal and high-energy neutrons and gamma radiation by Chiles, M., Mihalczo, J., Blakeman, E.D.

“…Subcriticality experiments require high-efficiency radiation detectors that are sensitive to neutrons (thermal and fast) over a wide energy range and to gamma…”
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Validation of the Monte Carlo code MCNP-DSP by Valentine, T.E., Mihalczo, J.T.

“…Several calculations were performed to validate MCNP-DSP, which is a Monte Carlo code that calculates all the time and frequency analysis parameters associated…”
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A portable measurement system for subcriticality measurements by the CF-source-driven neutron noise analysis method by Mihalczo, J.T., Ragan, G.E., Blakeman, E.E.

“…A description is given of a portable measurement system consisting of a personal computer used as a Fourier analyzer and three detection channels (with…”
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An alpha particle detector for a portable neutron generator for the Nuclear Materials Identification System (NMIS) by Hausladen, P.A., Neal, J.S., Mihalczo, J.T.

“…A recoil alpha particle detector has been developed for use in a portable neutron generator. The associated particle sealed tube neutron generator (APSTNG)…”
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Characterization of an Associated Particle Neutron Generator With ZnO:Ga Alpha-Detector and Active Focusing by Koltick, D.S., Kane, S.Z., Lvovsky, M., Mace, E.K., McConchie, S.M., Mihalczo, J.T.

“…A deuterium-tritium (DT) associated particle neutron generator (APNG) with active focusing has been operated using an alpha particle detector made of a ZnO:Ga…”
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Utilization of actively-induced, prompt radiation emission for nonproliferation applications by Blackburn, B.W., Jones, J.L., Moss, C.E., Mihalczo, J.T., Hunt, A.W., Harmon, F., Watson, S.M., Johnson, J.T.

“…The pulsed photonuclear assessment (PPA) technique, which has demonstrated the ability to detect shielded nuclear material, is based on utilizing delayed…”
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Monte Carlo analysis of neutron detection with a BaF(2) scintillation detector by Pozzi, S A, Neal, J S, Oberer, R B, Mihalczo, J T

“…This work presents the results of investigations aimed at simulating the response of a barium fluoride (BaF(2)) detector to neutrons and photons. The…”
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Monte Carlo analysis of neutron detection with a BaF sub(2) scintillation detector by Pozzi, SA, Neal, J S, Oberer, R B, Mihalczo, J T

“…This work presents the results of investigations aimed at simulating the response of a barium fluoride (BaF sub(2)) detector to neutrons and photons. The…”
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In-the-flash pulse shape discrimination with liquid scintillators by Williams, R. B., Blackburn, B. W., Hausladen, P., Hunt, A. W., Johnson, J. T., Jones, J. L., Mihalczo, J. T., Moss, C. E., Ianakiev, K. D.

“…Single neutron and gamma charge pulses were captured using a fast ADC. These data were used to populate simulated 5-µs active interrogation flash events…”
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Detection of Special Nuclear Material by means of promptly emitted radiation following photonuclear stimulation by Blackburn, B., Jones, J., Watson, S., Johnson, J., Gerts, D., Moss, C., Waters, L., Ianakiev, K., Mihalczo, J., Hausladen, P., Pozzi, S., Flaska, M., Clarke, S., Hunt, A., Thompson, S., Kinlaw, M.

“…Techniques have been developed to exploit abundant prompt emissions from photonuclear reactions for the identification of special nuclear material (SNM). These…”
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Plasma Confinement Studies in the ISX- A Tokamak by Murakami, M., Neilson, G. H., Howe, H. C., Jernigan, T. C., Bates, S. C., Bush, C. E., Colchin, R. J., Dunlap, J. L., Edmonds, P. H., Hill, K. W., Isler, R. C., Ketterer, H. E., King, P. W., McNeill, D. W., Mihalczo, J. T., Neidigh, R. V., Pare, V. K., Saltmarsh, M. J., Wilgen, J. B., Zurro, B.

“…Gross-energy-confinement times in the ISX-A (Impurity Study Experiment) tokamak exceeded predictions of the usual empirical scaling relations. This performance…”
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