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Engineering and economic evaluation of wet/dry cooling towers for water conservation

Description: The results are presented of a design and cost study for wet/dry tower systems used in conjunction with 1000 MWe nuclear power plants to reject waste heat while conserving water. Design and cost information for wet/dry tower systems are presented, and these cooling system alternatives are compared with wet and dry tower systems to determine whether the wet/dry tower concept is an economically viable alternative. The wet/dry cooling tower concept investigated is one which combines physically sep… more
Date: November 1, 1976
Creator: Hu, M. C.
Partner: UNT Libraries Government Documents Department
open access

DOE's energy data base (EDB) versus other energy-related data bases: a comparative analysis

Description: The release of the DOE Energy Data Base to commercial services in 1980 raised an immediate question in the minds of some searchers: how does this new data base fit into the spectrum of already-available data bases. Because the authors have been closely associated with the Department of Energy's RECON system and its data bases for several years, as trainers and as editor of the DOE/RECON Newsletter, the question was of great interest and we decided to investigate it.
Date: February 1, 1981
Creator: Robinson, J. & Hu, M.
Partner: UNT Libraries Government Documents Department
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Uranium and Aluminosilicate Surface Precipitation Tests

Description: The 2H evaporator at the Savannah River Site has been used to treat an aluminum-rich waste stream from canyon operations and a silicon-rich waste stream from the Defense Waste Processing Facility. The formation of aluminosilicate scale in the evaporator has caused significant operational problems. Because uranium has been found to accumulate in the aluminosilicate solids, the scale deposition has introduced criticality concerns as well. The objective of the tests described in this report is to … more
Date: November 27, 2002
Creator: Hu, M.Z.
Partner: UNT Libraries Government Documents Department
open access

Results of Deposition Scoping Tests

Description: The processes of crystallization and solid deposit formation that led to the shutdown of the 2H evaporator operation at the Savannah River Site (SRS) and that could possibly cause similar problems in the future or in other evaporators need to be better understood. Through experimentation, thermodynamic modeling, and correlation of scaling to historical tank farm operations, progress has been made in developing guidelines as to the concentrations of silicon and aluminum that can be processed by … more
Date: March 4, 2003
Creator: Hu, M.Z.
Partner: UNT Libraries Government Documents Department
open access

Design and Synthesis of Oriented Guest-Host Nanostructures for Enhanced Membrane Performances

Description: This project has demonstrated a novel nanomaterial design concept and a synthesis method for ''guesthost'' type superionic-conducting nanocomposite membranes. This concept consists of nanophases of oxide electrolyte nanograins (guest) encapsulated inside the nanopore channels of an oxide layer matrix (host), with channels oriented perpendicular to the layer surface. Using ionic conducting YSZ (yttrium stabilized zirconia) as a special case, we have shown that the host-guest design allows orient… more
Date: November 15, 2005
Creator: Hu, M.Z.
Partner: UNT Libraries Government Documents Department
open access

Preliminary Results of Testing of Flow Effects on Evaporator Scaling

Description: This investigation has focused on the effects of fluid flow on solids deposition from solutions that simulate the feed to the 2H evaporator at the Savannah River Site. Literature studies indicate that the fluid flow (or shear) affects particle-particle and particle-surface interactions and thus the phenomena of particle aggregation in solution and particle deposition (i.e., scale formation) onto solid surfaces. Experimental tests were conducted with two configurations: (1) using a rheometer to … more
Date: February 15, 2002
Creator: Hu, M.Z.
Partner: UNT Libraries Government Documents Department
open access

Observation of longitudinal diffusion and cooling due to intra-beam scattering at the Fermilab Recycler Ring

Description: The Fermilab Recycler Ring is a high-vacuum fixed energy antiproton storage ring with both stochastic (at present) and the future electron cooling systems. In this paper the technique for diffusion rate measurement, beam parameters and the analysis of data are presented, as well as the effect of intra-beam scattering on the operational considerations for the storage and cooling of the antiproton beam in the Recycler.
Date: May 1, 2005
Creator: Hu, M. & Nagaitsev, S.
Partner: UNT Libraries Government Documents Department
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Dynamic Particle Growth Testing - Phase I Studies

Description: There is clearly a great need to understand the processes of crystallization and solid scale formation that led to the shutdown of 2H evaporator operation at the Savannah River Site (SRS) and could possibly cause similar problems in the future in other evaporators. Waste streams from SRS operations that enter the evaporators generally contain alkaline, sodium nitrate/nitrite-based solutions with various changing concentrations of silicates and aluminates. It has been determined. that the silica… more
Date: May 17, 2001
Creator: Hu, M.Z-C.
Partner: UNT Libraries Government Documents Department
open access

Fermilab Recycler damper requirements and design

Description: The design of transverse dampers for the Fermilab Recycler storage ring is described. An observed instability and analysis of subsequent measurements where used to identify the requirements. The digital approach being implemented is presented.
Date: May 1, 2005
Creator: Crisp, J.; Hu, M.; Tupikov, V. & /Fermilab
Partner: UNT Libraries Government Documents Department
open access

Correction of unevenness in recycler beam profile

Description: A beam confined between two rf barriers in the Fermilab Recycler Ring exhibits very uneven longitudinal profile. This leads to the consequence that the momentum-mined antiproton bunches will have an intolerable variation in bunch intensity. The observed profile unevenness is the result of a tiny amount of rf imperfection and rf beam-loading. The profile unevenness can be flattened by feeding back the uneven rf fan-back gap voltage to the low-level rf.
Date: May 1, 2006
Creator: Crisp, J.; Hu, M. & Ng, K. Y.
Partner: UNT Libraries Government Documents Department
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The phonon density of states measured with synchrotron radiation and nuclear resonances.

Description: In this experiment, we will use synchrotron radiation to measure the density of states of vibrational excitations (phonons.) Each group of students will conduct an experiment at sector 3-ID of the Advanced Photon Source, the nation's premier synchrotron radiation facility. We provide one support staff per group, i.e., Drs. Michael Hu, Sarvjit Shastri, Wolfgang Sturhahn, and Tom Toellner will help their group to perform the experiment and interpret the data. After data collection (1-2 h per grou… more
Date: January 26, 2001
Creator: Sturhahn, W.; Hu, M.; Shastri, S. & Toellner, T.
Partner: UNT Libraries Government Documents Department
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Continuous, Rapid Production of Uniform Microparticles by Electrodispersion

Description: Ultrafine particles constitute the key building blocks for diverse advanced structural and functional materials, such as high-performance ceramics and alloys. These advanced materials have tremendous impact in many areas, including catalysis, separations, electronics, energy production processes, and environmental applications. Of particular importance, nanophase ceramic or metallic materials that contain nanosized (<100 nm) particles/grains show dramatically improved performance (mechanical… more
Date: November 15, 1998
Creator: DePaoli, D.W. & Hu, M.Z.-C.
Partner: UNT Libraries Government Documents Department
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Cooling in a compound bucket

Description: Electron cooling in the Fermilab Recycler ring is found to create correlation between longitudinal and transverse tails of the antiproton distribution. By separating the core of the beam from the tail and cooling the tail using 'gated' stochastic cooling while applying electron cooling on the entire beam, one may be able to significantly increase the overall cooling rate. In this paper, we describe the procedure and first experimental results.
Date: September 1, 2007
Creator: Shemyakin, A.; Bhat, C.; Broemmelsiek, D.; Burov, A.; Hu, M. & /Fermilab
Partner: UNT Libraries Government Documents Department
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High resolution monochromator for inelastic scattering studies of high energy phonons using undulator radiation at the advanced photon source

Description: A monochromator for use at 13.84 keV with a calculated bandpass of 5.2 meV was designed built, and tested. Tuning was performed by rotating the inner crystal of a pair of nested silicon channel-cut crystals. The inner crystal employs the (884) reflection, and the outer crystal employs a collimating asymmetric (422) reflection (dynamical asymmetry factor, b, equal to {minus}17.5). Tests were done with a double-crystal Si(111) pre-monochromator situated upstream of the high resolution monochromat… more
Date: August 1, 1997
Creator: Macrander, A. T.; Schwoerer-Boehning, M.; Abbamonte, P. M. & Hu, M.
Partner: UNT Libraries Government Documents Department
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A muon beam for cooling experiments

Description: Within the framework of the Fermilab Muon Collider Task Force, the possibility of developing a dedicated muon test beam for cooling experiments has been investigated. Cooling experiments can be performed in a very low intensity muon beam by tracking single particles through the cooling device. With sufficient muon intensity and large enough cooling decrement, a cooling demonstration experiment may also be performed without resolving single particle trajectories, but rather by measuring the aver… more
Date: June 1, 2007
Creator: Jansson, Andreas; Balbekov, V. I.; Broemmelsiek, Daniel Robert; Hu, M.; Mokhov, Nikolai V. & Yonehara, K.
Partner: UNT Libraries Government Documents Department
open access

Inelastic scattering of synchrotron radiation from electrons and nuclei for lattice dynamics studies.

Description: The inelastic scattering of x-rays, one of the first applications of x-rays to the field of condensed matter physics, has been rejuvenated in the last decade. The availability of synchrotrons radiation from wiggler and undulator sources combined with advances in monochromatization of the incident beam and analysis of the scattered beam with meV resolution led to the measurement of phonon dispersion relations. In addition, the use of Moessbauer nuclei as scatterer and analyzers has led to the di… more
Date: December 3, 1999
Creator: Alp, E. E.; Sturhahn, W.; Sinn, H.; Toellner, T.; Hu, M.; Sutter, J. et al.
Partner: UNT Libraries Government Documents Department
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Beam instrumentation for future high intense hadron accelerators at Fermilab

Description: High intensity hadron beams of up to 2 MW beam power are a key element of new proposed experimental facilities at Fermilab. Project X, which includes a SCRF 8 GeV H{sup -} linac, will be the centerpiece of future HEP activities in the neutrino sector. After a short overview of this, and other proposed projects, we present the current status of the beam instrumentation activities at Fermilab with a few examples. With upgrades and improvements they can meet the requirements of the new beam facili… more
Date: August 1, 2008
Creator: Wendt, M.; Hu, M.; Tassotto, G.; Thurman-Keup, R.; Scarpine, V.; Shin, S. et al.
Partner: UNT Libraries Government Documents Department
open access

Introduction to nuclear resonant scattering with synchrotron radiation

Description: In recent years, the use of synchrotron radiation has enjoyed increasing interest in applications to topics of Moessbauer spectroscopy. The development was initiated by the pioneering experimental work of Gerdau et al. following the original proposal of Ruby to use synchrotron radiation for the excitation of low energy nuclear resonances. From the early experiments it was clear that synchrotron radiation experiments with nuclear resonances would only succeed if familiar energy resolved measurem… more
Date: August 1, 1997
Creator: Sturhahn, W.; Alp, E.E.; Toellner, T.S.; Hession, P.; Hu, M. & Sutter, J.
Partner: UNT Libraries Government Documents Department
open access

Transverse instability of the antiproton beam in the Recycler Ring

Description: The brightness of the antiproton beam in Fermilab's 8 GeV Recycler ring is limited by a transverse instability. This instability has occurred during the extraction process to the Tevatron for large stacks of antiprotons even with dampers in operation. This paper describes observed features of the instability, introduces the threshold phase density to characterize the beam stability, and finds the results to be in agreement with a resistive wall instability model. Effective exclusion of the long… more
Date: March 1, 2011
Creator: Prost, L. R.; Bhat, C. M.; Burov, A.; Crisp, J.; Eddy, N.; Hu, M. et al.
Partner: UNT Libraries Government Documents Department
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Design and testing of a continuous metal biosorption system. Final report, March 10, 1994--June 9, 1995

Description: The research pursued in this project consisted of two portions that were conducted with constant coordination to allow the ultimate merger of research results. ORNL was assigned the task of developing the biomass portion of the bioreactor, while SCSC was responsible for the mechanical portions of the bioreactor. This report describes the technical aspects of a novel biological sorbent, consisting of microbial biomass immobilized within a polyurethane gel matrix, that was developed and character… more
Date: December 31, 1995
Creator: Faison, B. D.; Hu, M. Z. C.; Reeves, M. E.; McGraw, T. F.; Gupte, U. & Haris, W. G.
Partner: UNT Libraries Government Documents Department
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Phonon density of states in epitaxial Fe/Cr(001) superlattices

Description: Incoherent nuclear resonant absorption of synchrotron radiation at the 14.413 keV nuclear resonance of {sup 57}Fe was employed to measure directly the Fe-projected (partial) photon density of states (DOS) in epitaxial [Fe(8.7ML)/Cr(8ML)]{sub 200} superlattices and alloy films MBE-grown on MgO(001). Isotopically depleted {sup 56}Fe was used which gives no resonance signal. 0.7 monolayers (ML) thick {sup 57}Fe-probe layer (1{angstrom}) of 95.5% enrichment were placed either at the {sup 56}Fe-on-C… more
Date: October 21, 1999
Creator: Ruckert, T.; Keune, W.; Sturhahn, W.; Hu, M. Y.; Sutter, J. P.; Toellner, T. S. et al.
Partner: UNT Libraries Government Documents Department
open access

Beam profile measurement with flying wires at the Fermilab Recycler Ring

Description: Flying wires were installed at the Fermilab Recycler Ring for transverse beam profile measurement for both proton and antiproton beams. The following note describes the system configuration, calibration and resolution of the flying wire system, interactions between the wires and the beam, as well as analysis of the transverse beam profile in the presence of a stochastic cooling system.
Date: May 1, 2005
Creator: Carcagno, R.; Pishchalnikov, Yu.; Krider, J.; Hu, M.; Lorman, E.; Marchionni, A. et al.
Partner: UNT Libraries Government Documents Department
open access

A study of emittance growth in the recycler ring

Description: We investigate processes contributing to emittance growth in the Fermilab Recycler Ring. In addition to beam-gas multiple scattering, we also examine other external factors such as Main Injector ramping affecting the emittance growth.
Date: July 20, 2001
Creator: Gounder, K.; Brown, B. C.; Gattuso, C.; Hu, M.; Johnson, D.; Marriner, J. et al.
Partner: UNT Libraries Government Documents Department
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