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Effects of Electromagnetic Fields on Fish and Invertebrates Task 2.1.3: Effects on Aquatic Organisms Fiscal Year 2012 Progress Report Environmental Effects of Marine and Hydrokinetic Energy
Energy generated by the world’s oceans and rivers offers the potential to make substantial contributions to the domestic and global renewable energy supply. However, the marine and hydrokinetic (MHK) energy industry faces challenges related to siting, permitting, construction, and operation of pilotand commercial-scale facilities. One of the challenges is to understand the potential effects to marine organisms from electromagnetic fields, which are produced as a by-product of transmitting power from offshore to onshore locations through underwater transmission cables. This report documents the progress of the third year of research (fiscal year 2012) to investigate environmental issues associated with marine and hydrokinetic energy (MHK) generation. This work was conducted by Pacific Northwest National Laboratory (PNNL) for the U.S. Department of Energy’s (DOE’s) Office of Energy Efficiency and Renewable Energy (EERE) Wind and Water Technologies Office. The report addresses the effects of electromagnetic fields (EMFs) on selected marine species where significant knowledge gaps exist. The species studied this fiscal year included one fish and two crustacean species: the Atlantic halibut (Hippoglossus hippoglossus), Dungeness crab (Metacarcinus magister), and American lobster (Homarus americanus).
Date:
May 20, 2013
Creator:
Woodruff, Dana L.; Cullinan, Valerie I.; Copping, Andrea E. & Marshall, Kathryn E.
Object Type:
Report
System:
The UNT Digital Library
FY2014 Budget Documents: Internet and GPO Availability
None
Date:
May 20, 2013
Creator:
Nagel, Jared Conrad
Object Type:
Report
System:
The UNT Digital Library
Guideline for the Implementation of Safeguards into the Design Process for Nuclear Reactors
None
Date:
May 20, 2013
Creator:
Farley, D
Object Type:
Report
System:
The UNT Digital Library
he Impact of Primary Marine Aerosol on Atmospheric Chemistry, Radiation and Climate: A CCSM Model Development Study
This project examined the potential large-scale influence of marine aerosol cycling on atmospheric chemistry, physics and radiative transfer. Measurements indicate that the size-dependent generation of marine aerosols by wind waves at the ocean surface and the subsequent production and cycling of halogen-radicals are important but poorly constrained processes that influence climate regionally and globally. A reliable capacity to examine the role of marine aerosol in the global-scale atmospheric system requires that the important size-resolved chemical processes be treated explicitly. But the treatment of multiphase chemistry across the breadth of chemical scenarios encountered throughout the atmosphere is sensitive to the initial conditions and the precision of the solution method. This study examined this sensitivity, constrained it using high-resolution laboratory and field measurements, and deployed it in a coupled chemical-microphysical 3-D atmosphere model. First, laboratory measurements of fresh, unreacted marine aerosol were used to formulate a sea-state based marine aerosol source parameterization that captured the initial organic, inorganic, and physical conditions of the aerosol population. Second, a multiphase chemical mechanism, solved using the Max Planck Institute for Chemistry’s MECCA (Module Efficiently Calculating the Chemistry of the Atmosphere) system, was benchmarked across a broad set of observed chemical and physical conditions in the …
Date:
May 20, 2013
Creator:
Keene, William C. & Long, Michael S.
Object Type:
Report
System:
The UNT Digital Library
Industrialization of the ILC Project
None
Date:
May 20, 2013
Creator:
Ross, Marc C.
Object Type:
Article
System:
The UNT Digital Library
International Food Aid Programs: Background and Issues
This report discusses past United States food aid programs in relation to 2013 farm bill food aid proposals by Congress. This includes past international and domestic applications of food aid, its issues, and congressional response.
Date:
May 20, 2013
Creator:
Hanrahan, Charles E.
Object Type:
Report
System:
The UNT Digital Library
Intrinsic Chevrolets at the SSC
None
Date:
May 20, 2013
Creator:
Brodsky, Stanley
Object Type:
Article
System:
The UNT Digital Library
Journal of the House of Representatives of Texas: 83rd Legislature, Regular Session, May 20, 2013
Proceedings of the House of Representatives of Texas for the 75th day of the regular session of the 83rd Legislature documenting legislation, reports, discussions, votes, and points-of-order.
Date:
May 20, 2013
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
Journal of the Senate of Texas: 83rd Legislature, Regular Session, Monday, May 20, 2013
Proceedings of the Senate of Texas for the 62nd day of the regular session of the 83rd Legislature documenting legislation, reports, discussions, votes, and points-of-order.
Date:
May 20, 2013
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
Reaction of Gold with Indium Below 50C: Radius Loss Delta R and Standard Deviation Sigma of Soldered 4 mil Wires at 100 Years Predicted from Measured Delta R and Sigma at 30 Years.
None
Date:
May 20, 2013
Creator:
Siekhaus, W. J.; Go, J.; Biener, M.; Jensen, S. A.; Havstad, M. A.; Cheng, J. et al.
Object Type:
Report
System:
The UNT Digital Library
Search for Strong Gravity Signatures in Same-Sign Dimuon Final States Using the ATLAS Detector at the LHC
None
Date:
May 20, 2013
Creator:
Aad, Georges
Object Type:
Article
System:
The UNT Digital Library
1 GeV CW nonscaling FFAG for ADS, and magnet parameters
Multi-MW proton driver capability remains a challenging, critical technology for many core HEP programs, particularly the neutrino ones such as the Muon Collider and Neutrino factory, and for high-profile energy applications such as Accelerator Driven Subcritical Reactors (ADS) and Accelerator Transmutation of Waste for nuclear power and waste management. Work is focused almost exclusively on an SRF linac, as, to date, no re-circulating accelerator can attain the 10-20 MW capability necessary for the nuclear applications. Recently, the concept of isochronous orbits has been explored and developed for nonscaling FFAGs using powerful new methodologies in FFAG accelerator design. Work is progressing on a stable, high-intensity, 1 GeV isochronous FFAG. Initial specifications of novel magnets with the nonlinear radial fields required to support isochronous operation are also reported here.
Date:
May 20, 2012
Creator:
Johnstone, C.; Meot, F.; Snopok, P. & Weng, W.
Object Type:
Article
System:
The UNT Digital Library
3D simulations of multipacting in the 56 MHz SRF cavity
The 56 MHz SRF Quarter-Wave Resonator (QWR) is designed for RHIC as a storage cavity to improve the collider performance. 2D multipacting simulation has been done for the cavity alone. Ripples were added to the outer body of the cavity for multipacting suppression based on the simulation findings. During operation, there will be four higher order mode (HOM) couplers. All of these components will be exposed to high RF fields. In this paper we compare 2D and 3D codes simulation results for multipacting in the cavity. We also report 3D simulation results for multipacting simulation at the couplers.
Date:
May 20, 2012
Creator:
Q., Wu; Belomestnykh, S.; Ge, L.; Ko, K.; Li, Z.; Ng, C. et al.
Object Type:
Article
System:
The UNT Digital Library
The AGS synchrotron with four helical magnets
The idea of using two partial helical magnets was applied successfully to the AGS synchrotron to preserve the proton beam polarization. In this paper we explore in details the idea of using four helical magnets placed symmetrically in the AGS ring. The placement of four helical magnets in the AGS ring provides many advantages over the present setup of the AGS which uses two partial helical magnets. First, the symmetric placement of the four helical magnets allows for a better control of the AGS optics with reduced values of the beta functions especially near beam injection, second, the vertical spin direction during beam injection and extraction is closer to vertical, and third, it provides for a larger 'spin tune gap', which allows the vertical and horizontal tunes to be placed, and prevent the horizontal and vertical intrinsic spin resonances of the AGS to occur during the acceleration cycle. Although the same spin gap can be obtained with a single or two partial helices, the required high field strength of a single helix makes its use impractical, and that of the double helix rather difficult. In this paper we will provide results on the spin tune and on the optics of …
Date:
May 20, 2012
Creator:
Tsoupas, N.; Huang, H.; Roser, T.; MacKay, W. W. & Trbojevic, D.
Object Type:
Article
System:
The UNT Digital Library
Analysis of beam loss induced abort kicker instability
Through more than a decade of operation, we have noticed the phenomena of beam loss induced kicker instability in the RHIC beam abort systems. In this study, we analyze the short term beam loss before abort kicker pre-fire events and operation conditions before capacitor failures. Beam loss has caused capacitor failures and elevated radiation level concentrated at failed end of capacitor has been observed. We are interested in beam loss induced radiation and heat dissipation in large oil filled capacitors and beam triggered thyratron conduction. We hope the analysis result would lead to better protection of the abort systems and improved stability of the RHIC operation.
Date:
May 20, 2012
Creator:
Zhang, W.; Sandberg, J.; Ahrens, L.; Fischer, W.; Hahn, H.; Mi, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Analysis of kicker noise induced beam emittance growth
Over the last few years, physicists have occasionally observed the presence of noise acting on the RHIC beams leading to emittance growth at high beam energies. While the noise was sporadic in the past, it became persistent during the Run-11 setup period. An investigation diagnosed the source as originating from the RHIC dump kicker system. Once identified the issue was quickly resolved. We report in this paper the investigation result, circuit analysis, measured and simulated waveforms, solutions, and future plans.
Date:
May 20, 2012
Creator:
Zhang, W.; Sandberg, J.; Ahrens, L.; Blacker, I. M.; Brennan, M.; Blaskiewicz, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Beam Experiments Towards High-Intensity Beams in RHIC
Proton bunch intensities in RHIC are planned to be increased from 2 {center_dot} 10{sup 11} to 3 {center_dot} 10{sup 11} protons per bunch to increase the luminosity, together with head-on beam-beam compensation using electron lenses. To study the feasibility of the intensity increase, beam experiments are being performed. Recent experimental results are presented.
Date:
May 20, 2012
Creator:
Montag, C.; Ahrens, L.; Brennan, J. M.; Blaskiewicz, M.; Drees, A.; Fischer, W. et al.
Object Type:
Article
System:
The UNT Digital Library
Beam optics and the pp2pp experiment at RHIC
The newly installed forward detector system at the STAR experiment at RHIC measures small angle elastic and inelastic scattering of polarized protons on polarized protons. The detector system makes use of a pair of Roman Pot (RP) detectors, instrumented with silicon detectors, and located on either side of the STAR intersection region downstream of the DX and D0 dipoles and quadrupole triplets. The parallel to point optics is designed so that scattering angles are determined from position measurements at the RP's with small error. The RP setup allows measurement of position and angle for a subset of the scattered protons. With this position/angle correlations at the RP's can be compared with optics model predictions to get a measure of the accuracy of the quadrupole triplet current settings. The current in each quadrupole in the triplets is comprised of sums and differences of up to six power supplies and an overall 1% error in the triplet field strengths results in a 4% error in four-momentum transfer squared. This technique is also useful to check the polarity of the skew elements located in each quadrupole triplet. Results of the analysis will be presented.
Date:
May 20, 2012
Creator:
H., Pile P.; Guryn, W.; Lee, J. H.; Tepikian, S. & Yip, K.
Object Type:
Article
System:
The UNT Digital Library
Bunch compressor design for potential FEL operation at eRHIC
N/A
Date:
May 20, 2012
Creator:
Y., Jing; Hao, Y. & Litvinenko, V.
Object Type:
Article
System:
The UNT Digital Library
Calculation of synchrotron radiation from high intensity electron beam at eRHIC
The Electron-Relativistic Heavy Ion Collider (eRHIC) at Brookhaven National Lab is an upgrade project for the existing RHIC. A 30 GeV energy recovery linac (ERL) will provide a high charge and high quality electron beam to collide with proton and ion beams. This will improve the luminosity by at least 2 orders of magnitude. The synchrotron radiation (SR) from the bending magnets and strong quadrupoles for such an intense beam could be penetrating the vacuum chamber and producing hazards to electronic devices and undesired background for detectors. In this paper, we calculate the SR spectral intensity, power density distributions and heat load on the chamber wall. We suggest the wall thickness required to stop the SR and estimate spectral characteristics of the residual and scattered background radiation outside the chamber.
Date:
May 20, 2012
Creator:
Y., Jing; Chubar, O. & Litvinenko, V.
Object Type:
Article
System:
The UNT Digital Library
Coherent beam-beam effects observation and mitigation at the RHIC collider
In polarized proton operation in RHIC coherent beam-beam modes are routinely observed with beam transfer function measurements in the vertical plane. With the existence of coherent modes a larger space is required in the tune diagram than without them and stable conditions can be compromised for operation with high intensity beams as foreseen for future luminosity upgrades. We report on experiments and simulations carried out to understand the existence of coherent modes in the vertical plane and their absence in the horizontal plane, and investigate possible mitigation strategies.
Date:
May 20, 2012
Creator:
S., White; Fischer, W. & Luo, Y.
Object Type:
Article
System:
The UNT Digital Library
Commissioning of a beta* knob for dynamic IR correction at RHIC
In addition to the recent optics correction technique demonstrated at CERN and applied at RHIC, it is important to have a separate tool to control the value of the beta functions at the collision point ({beta}*). This becomes even more relevant when trying to reach high level of integrated luminosity while dealing with emittance blow-up over the length of a store, or taking advantage of compensation processes like stochastic cooling. Algorithms have been developed to allow modifying independently the beta function in each plane for each beam without significant increase in beam losses. The following reviews the principle of such algorithms and their experimental implementation as a dynamic {beta}-squeeze procedure.
Date:
May 20, 2012
Creator:
G., Robert-Demolaize; Marusic, A.; Tepikian, S. & White, S.
Object Type:
Article
System:
The UNT Digital Library
Comparing new models of transverse instability with simulations
Recently, Balbekov and Burov have produced an ordinary integro-differential equation that approximates the Vlasov equation for beams with wakefields and large space charge tune shift. The present work compares this model with simulations. In particular, the claim that certain types of transverse wakes cannot lead to mode coupling instabilities is explored.
Date:
May 20, 2012
Creator:
M., Blaskiewicz
Object Type:
Article
System:
The UNT Digital Library
Construction progress of the RHIC electron lenses
In polarized proton operation the RHIC performance is limited by the head-on beam-beam effect. To overcome this limitation two electron lenses are under construction. We give an overview of the construction progress. Guns, collectors and the warm electron beam transport solenoids with their power supplies have been constructed. The superconducting solenoids that guide the electron beam during the interaction with the proton beam are near completion. A test stand has been set up to verify the performance of the gun, collector and some of the instrumentation. The infrastructure is being prepared for installation, and simulations continue to optimize the performance.
Date:
May 20, 2012
Creator:
Fischer, W.; Altinbas, Z.; Anerella, M.; Beebe, E. & al, et
Object Type:
Article
System:
The UNT Digital Library