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Studies of Background Levels for the NIF Yield Diagnostics from Neutron and Gamma Radiation

Description: The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) is nearing completion of construction and is preparing for the National Ignition Campaign (NIC) with potentially significant yield in 2010. The design of a wide range of yield diagnostics in and outside the target-bay of the NIF must consider scattered background neutrons and neutron-induced gamma rays to measure neutrons and x-rays from target. The large and complex target chamber and facility make the calcul… more
Date: August 27, 2007
Creator: Song, P.; Eder, D.; Moran, M.; Landen, O.; O'Brien, D. & Hsing, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Effect of Magnetic Field on the Position of HTS Leads and theCooler in the Services Tower of the MICE Focusing Magnet

Description: The MICE focusing solenoids have three 4 K coolers (two forthe superconducting magnet and one for the liquid absorber) and four HTSleads that feed the current to the focusing coils. The focusing solenoidsproduce large radial external fields when they operate with the polarityof the two coils in opposition (the gradient or flip mode). When the MICEfocusing coils operate at the same polarity (the solenoid or non-flipmode), the fields are much smaller and parallel to the axis of thesolenoid. The w… more
Date: August 27, 2007
Creator: Green, M. A.; Yang, S. Q.; Cobb, J.; Lau, P.; Lau, W. W.; Witte, H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Engineering Design of the 1.5 m Diameter Solenoid for the MICERFCC Modules

Description: The RF coupling coil (RFCC) module of MICE is where muonsthat have been cooled within the MICE absorber focus (AFC) modules arere-accelerated to their original longitudinal momentum. The RFCC moduleconsists of four 201.25 MHz RF cavities in a 1.4 meter diameter vacuumvessel. The muons are kept within the RF cavities by the magnetic fieldgenerated by a superconducting coupling solenoid that goes around the RFcavities. The coupling solenoid will be cooled using a pair of 4 K pulsetube cooler that… more
Date: August 27, 2007
Creator: Wang, L.; Green, M. A.; Xu, F. Y.; Wu, H.; Li, L. K.; Gou, C. S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Cost of Superconducting Magnets as a Function of Stored Energy and Design Magnetic Induction Times the Field Volume

Description: By various theorems one can relate the capital cost of superconducting magnets to the magnetic energy stored within that magnet. This is particularly true for magnet where the cost is dominated by the structure needed to carry the magnetic forces. One can also relate the cost of the magnet to the product of the magnetic induction and the field volume. The relationship used to estimate the cost the magnet is a function of the type of magnet it is. This paper updates the cost functions given in t… more
Date: August 27, 2007
Creator: Green, Mike; Green, M. A. & Strauss, B. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hydra modeling of experiments to study ICF capsule fill hole dynamics using surrogate targets

Description: In this section the results of HYDRA [1] design simulations will be discussed. The simulations were conducted in two dimensional, RZ geometry, with the fill tube on axis. The radiation transport was treated in the diffusion approximation using 15 energy groups. Opacities were calculated. The equations of state (EOS) for all materials used were from a combined analytic/Thomas-Fermi EOS which uses a modified Cowan model for the ion EOS, and uses a scaled Thomas-Fermi table for the electron EOS.
Date: August 27, 2007
Creator: Elliott, J B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Assembly and Test of a Support Structure for 3.5 m Long Nb3Sn Racetrack Coils.

Description: The LHC Accelerator Research Program (LARP) is currently developing 4 m long Nb{sub 3}Sn quadrupole magnets for a possible upgrade of the LHC Interaction Regions (IR). In order to provide a reliable test bed for the fabrication and test of long Nb{sub 3}Sn coils, LARP has started the development of the long racetrack magnet LRS01. The magnet is composed of two 3.6 m long racetrack coils contained in a support structure based on an aluminum shell pre-tensioned with water-pressurized bladders and… more
Date: August 27, 2007
Creator: Ferracin, P.; Ambrosio, G.; Anerella, M.; Caspi, S.; Cheng, D. W.; Felice, H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

LARP Long Nb3Sn Quadrupole Design.

Description: A major milestone for the LHC Accelerator Research Program (LARP) is the test, by the end of 2009, of two 4m-long quadrupole magnets (LQ) wound with Nb{sub 3}Sn conductor. The goal of these magnets is to be a proof of principle that Nb{sub 3}Sn is a viable technology for a possible LHC luminosity upgrade. The design of the LQ is based on the design of the LARP Technological Quadrupoles, presently under development at FNAL and LBNL, with 90-mm aperture and gradient higher than 200 T/m. The desig… more
Date: August 27, 2007
Creator: Ambrosio, G.; Andreev, N.; Anerella, M.; Barzi, E.; Bossert, R.; Caspi, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Helium Cooling System and Cold Mass Support System for theMICE Coupling Solenoid

Description: The MICE cooling channel consists of alternating threeabsorber focus coil module (AFC) and two RF coupling coil module (RFCC)where the process of muon cooling and reacceleration occurs. The RFCCmodule comprises a superconducting coupling solenoid mounted around fourconventional conducting 201.25 MHz closed RF cavities and producing up to2.2T magnetic field on the centerline. The coupling coil magnetic fieldis to produce a low muon beam beta function in order to keep the beamwithin the RF caviti… more
Date: August 27, 2007
Creator: Wang, L.; Wu, H.; Li, L. K.; Green, M. A.; Liu, C. S.; Li, L. Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

MICE Spectrometer Magnet System Progress

Description: The first magnets for the muon ionization cooling experimentwill be the tracker solenoids that form the ends of the MICE coolingchannel. The primary purpose of the tracker solenoids is to provide auniform 4 T field (to better than +-0.3 percent over a volume that is 1meter long and 0.3 meters in diameter) spectrometer magnet field for thescintillating fiber detectors that are used to analyze the muons in thechannel before and after ionization cooling. A secondary purpose for thetracker magnet i… more
Date: August 27, 2007
Creator: Green, Michael A. & Virostek, Steve P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Transport and Magnetization Properties of rolled RRP Nb3Sn Strands.

Description: Restack Rod Process (RRP) strands with 54 and 108 sub-elements were rolled from 0.7 mm diameter to 0.45 mm thickness to simulate the deformation of strands at the edges of Rutherford cables. Various diagnoses were then applied to assess performance and stability. Transport measurements were used to assess the effect of rolling on the critical current. Magnetization measurements were used to probe superconducting pathway bridging between deformed sub-elements. The copper residual resistivity rat… more
Date: August 27, 2007
Creator: Ghosh, A. K.; Cooley, L. D.; Dietderich, D. R. & Sun, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Cost of Helium Refrigerators and Coolers for SuperconductingDevices as a Function of Cooling at 4 K

Description: This paper is an update of papers written in 1991 and in1997 by Rod Byrns and this author concerning estimating the cost ofrefrigeration for superconducting magnets and cavities. The actual costsof helium refrigerators and coolers (escalated to 2007 dollars) areplotted and compared to a correlation function. A correlation functionbetween cost and refrigeration at 4.5 K is given. The capital cost oflarger refrigerators (greater than 10 W at 4.5 K) is plotted as afunction of 4.5-K cooling. The co… more
Date: August 27, 2007
Creator: Green, Michael A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Smith River Rancheria's Development of an Energy Organization Investigation

Description: Smith River Rancheria (SRR), for some time, has had a strong commitment to attaining energy selfsufficiency, to reduce overall energy costs and concurrently initiate economic development within the community. Early on it was recognized that the development of an energy organization was important and for this reason was made part of the SRR's strategic review not only for economic development but also the reduction of energy costs. Towards this end, SRR retained Werner G. Buehler of W.G. Buehler… more
Date: August 27, 2007
Creator: Associates, W.G Buehler &
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Conservation and the 2007 Farm Bill

Description: Conservation is playing a prominent role in the development of a farm bill by the 110th Congress. This report introduces some of the issues that are influencing the development of a conservation title. It then reviews the contents of the House-passed bill, H.R. 2419.
Date: August 27, 2007
Creator: Zinn, Jeffrey A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

HYDROGEN ISOTOPE RECOVERY USING PROTON EXCHANGE MEMBRANE ELECTROLYSIS OF WATER

Description: A critical component of tritium glovebox operations is the recovery of high value tritium from the water vapor in the glove box atmosphere. One proposed method to improve existing tritium recovery systems is to replace the disposable hot magnesium beds used to separate the hydrogen and oxygen in water with continuous use Proton Exchange Membrane Electrolyzers (PEMEs). This study examines radiation exposure to the membrane of a PEME and examines the sizing difference that would be needed if the … more
Date: August 27, 2007
Creator: Fox, E; Scott Greenway, S & Amy Ekechukwu, A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

EFFECTS OF ADDITION RATE AND ACID MATRIX ON THE DESTRUCTION OF AMMONIUM BY THE SEMI-CONTINUOUS ADDITION OF SODIUM NITRITE DURING EVAPORATION

Description: The destruction of ammonium by the semi-continuous addition of sodium nitrite during acidic evaporation can be achieved with a wide range of waste compositions. The efficiency of nitrite utilization for ammonium destruction was observed to vary from less than 20% to 60% depending on operating conditions. The effects of nitric acid concentration and nitrite addition rate are dominant factors that affect the efficiency of nitrite utilization for ammonium destruction. Reducing the acid concentrati… more
Date: August 27, 2007
Creator: Kyser, E
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Conservation and the 2007 Farm Bill

Description: This report introduces some of the issues that are influencing the development of a conservation title. It then reviews the contents of the House-passed bill, H.R. 2419. Some alternative proposals that the House considered are summarized in an appendix. The House-passed bill includes some elements of the alternative proposals (usually in modified form). This report is limited to the conservation title. However, conservation topics in recent farm bills have been increasingly addressed in other t… more
Date: August 27, 2007
Creator: Zinn, Jeffrey A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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