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Laser Safety for the Experimental Halls at SLAC_s Linac Coherent Light Source (LCLS)

Description: The LCLS at the SLAC National Accelerator Laboratory will be the world's first source of an intense hard x-ray laser beam, generating x-rays with wavelengths of 1nm and pulse durations less than 100fs. The ultrafast x-ray pulses will be used in pump-probe experiments to take stop-motion pictures of atoms and molecules in motion, with pulses powerful enough to take diffraction images of single molecules, enabling scientists to elucidate fundamental processes of chemistry and biology. Ultrafast c… more
Date: January 15, 2009
Creator: Woods, Michael; Anthony, Perry; Barat, Ken; Gilevich, Sasha; Hays, Greg & White, William E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Gamma-Ray Compton Light Source Development at Llnl

Description: A new class of tunable, monochromatic {gamma}-ray sources capable of operating at high peak and average brightness is currently being developed at LLNL for nuclear photoscience and applications. These novel systems are based on Compton scattering of laser photons by a high brightness relativistic electron beam produced by an rf photoinjector. A prototype, capable of producing > 10{sup 8} 0.7 MeV photons in a single shot, with a fractional bandwidth of 1%, and a repetition rate of 10 Hz, is c… more
Date: August 15, 2007
Creator: Hartemann, F. V.; Anderson, S. G.; Gibson, D. J.; Hagmann, C. A.; Johnson, M. S.; Jovanovic, I. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Energy conservation in citrus processing. Technical progress report No. 2, April 1, 1980-February 28, 1981

Description: Systems that reduce energy usage and are economically viable in the citrus fruit processing industry are identified. The preliminary results of Phase I are presented. Alternative systems to be considered are classified and denoted as central, modular, integrated, and combined. Progress is reported on the central and modular systems. (MCW)
Date: March 15, 1981
Creator: Leo, M. A.; Lari, R. I.; Moore, N. R.; Broussard, M. R. & Gyamfi, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A dedicated compressor monitoring system employing current signature analysis

Description: The use of motor current signature analysis (CSA) has been established as a useful method for periodic monitoring of electrically driven equipment. CSA is, moreover, especially well suited as the basis for a dedicated continuous monitoring system in an industrial setting. This paper presents just such an application that has been developed and installed in the US government uranium enrichment plant at Portsmouth, Ohio. The system, which is designed to detect specific axial-flow compressor probl… more
Date: April 15, 1993
Creator: Castleberry, K. N. & Smith, S. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Simple, Low Cost Longitudinal Phase Space Diagnostic

Description: For proper operation of the LCLS [1] x-ray free-electron laser (FEL), and other similar machines, measurement and control of the electron bunch longitudinal phase space is critical. The LCLS accelerator includes two bunch compressor chicanes to magnify the peak current. These magnetic chicanes can generate significant coherent synchrotron radiation (CSR), which can distort the phase space distribution. We propose a diagnostic scheme by exciting a weak skew quadrupole at an energy-chirped, high … more
Date: May 15, 2009
Creator: Bertsche, Kirk; Emma, Paul & Shevchenko, Oleg
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High Technology Centrifugal Compressor for Commercial Air Conditioning Systems

Description: R&D Dynamics, Bloomfield, CT in partnership with the State of Connecticut has been developing a high technology, oil-free, energy-efficient centrifugal compressor called CENVA for commercial air conditioning systems under a program funded by the US Department of Energy. The CENVA compressor applies the foil bearing technology used in all modern aircraft, civil and military, air conditioning systems. The CENVA compressor will enhance the efficiency of water and air cooled chillers, packaged roof… more
Date: April 15, 2006
Creator: Ruckes, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Field Demonstration of a Membrane Process to Separate Nitrogen From Natural Gas Progress Report

Description: The original proposal described the construction and operation of a 1 MMscfd treatment system to be operated at a Butcher Energy gas field in Ohio. The gas produced at this field contained 17% nitrogen. During pre-commissioning of the project, a series of well tests showed that the amount of gas in the field was significantly smaller than expected and that the nitrogen content of the wells was very high (25 to 30%). After evaluating the revised cost of the project, Butcher Energy decided that t… more
Date: November 15, 2004
Creator: Lokhandwala, Kaaeid
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

QUASI-OPTICAL 3-dB HYBRID FOR FUTURE HIGH-ENERGY ACCELERATORS

Description: Phase-controlled wave combiners-commutators and isolators for protecting rf sources against reflection from the accelerating structure can be built using a 3-dB hybrid built around a metallic grating used in a ''magic-Y'' configuration. Models of the magic-Y were designed and tested, both at 34.272 GHz using the Omega-P Ka-band magnicon, and at 11.424 GHz using the Omega-P/NRL X-band magnicon. All elements of the magic-Y were optimized analytically and numerically. A non-vacuum 34 GHz model of … more
Date: December 15, 2005
Creator: Hirshfield, Jay L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reynolds number effect on axial-flow compressor performance

Description: Investigation conducted in the altitude wind tunnel to study the effect of Reynolds number on the performance of an axial-flow compressor. The compressor was operated as a part of a turbojet engine over a range of pressure altitudes and compressor-inlet Reynolds numbers. Results regarding compressor efficiency, air flow, and a comparison with axial-flow compressors of different design are provided.
Date: September 15, 1949
Creator: Wallner, Lewis E. & Fleming, William A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Method of Matching Performance of Compressor Systems with that of Aircraft Power Sections

Description: "A method is developed of easily determining the performance of a compressor system relative to that of the power section for a given altitude. Because compressors, reciprocating engines, and turbines are essentially flow devices, the performance of each of these power-plant components is presented in terms of similar dimensionless ratios. The pressure and temperature changes resulting from restrictions of the charge-air flow and from heat transfer in the ducts connecting the components of the … more
Date: November 15, 1945
Creator: Bullock, Robert O.; Keetch, Robert C. & Moses, Jason J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation of a 10-Stage Subsonic Axial-Flow Research Compressor 5: Effect of Reducing Inlet-Guide-Vane Turning on Over-All and Inlet-Stage Performance

Description: Report presenting an investigation in which the inlet-guide-vane setting of a 10-stage compressor was reduced in order to approximate more closely the design absolute entrance flow angles to the first rotor. In order to determine the effects of these changes, the performance of the inlet stage was obtained simultaneously with the overall compressor performance for both the original and reduced incidence angles. Results regarding the compressor performance, inlet-stage performance, and effect of… more
Date: March 15, 1954
Creator: Budinger, Ray E. & Serovy, George K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrogen Pipeline Compressors Annual Progress Report.

Description: The objectives are: (1) develop advanced materials and coatings for hydrogen pipeline compressors; (2) achieve greater reliability, greater efficiency, and lower capital in vestment and maintenance costs in hydrogen pipeline compressors; and (3) research existing and novel hydrogen compression technologies that can improve reliability, eliminate contamination, and reduce cost. Compressors are critical components used in the production and delivery of hydrogen. Current reciprocating compressors … more
Date: July 15, 2011
Creator: Fenske, G. R. & Erck, R. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Value-Added Products from Remote Natural Gas

Description: In Wyoming and throughout the United States, there are natural gas fields that are not producing because of their remoteness from gas pipelines. Some of these fields are ideal candidates for a cogeneration scheme where components suitable for chemical feedstock or direct use, such as propane and butane, are separated. Resulting low- to medium-Btu gas is fired in a gas turbine system to provide power for the separation plant. Excess power is sold to the utility, making the integrated plant a tru… more
Date: March 15, 2002
Creator: Johnson, Lyle A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Realization of an X-Band RF System for LCLS

Description: A single X-band (11.424 GHz) accelerating structure is to be incorporated in the LINAC Coherent Light Source (LCLS) design to linearize the energy-time correlation (or gradient) across each bunch; features which originate in the preceding accelerating structures (L0 and L1) [1]. This harmonic RF system will operate near the negative RF crest to decelerate the beam, reducing these non-linear components of the correlation, providing a more efficient compression in the downstream bunch compressor … more
Date: June 15, 2005
Creator: McIntosh, P.; Akre, R.; Brooks, W.; Emma, P. & Rago, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fiber laser front end for high energy petawatt laser systems

Description: We are developing a fiber laser front end suitable for high energy petawatt laser systems on large glass lasers such as NIF. The front end includes generation of the pulses in a fiber mode-locked oscillator, amplification and pulse cleaning, stretching of the pulses to >3ns, dispersion trimming, timing, fiber transport of the pulses to the main laser bay and amplification of the pulses to an injection energy of 150 {micro}J. We will discuss current status of our work including data from pack… more
Date: June 15, 2006
Creator: Dawson, J. W.; Messerly, M. J.; Phan, H.; Mitchell, S.; Drobshoff, A.; Beach, R. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Field Demonstration of a Membrane Process to Separate Nitrogen from Natural Gas

Description: The original proposal described the construction and operation of a 1 MMscfd treatment system to be operated at a Butcher Energy gas field in Ohio. The gas produced at this field contained 17% nitrogen. During pre-commissioning of the project, a series of well tests showed that the amount of gas in the field was significantly smaller than expected and that the nitrogen content of the wells was very high (25 to 30%). After evaluating the revised cost of the project, Butcher Energy decided that t… more
Date: December 15, 2005
Creator: Lokhandwala, Kaaeid
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation of 10-Stage Axial-Flow X24C-2 Compressor, 1, Performance at Inlet Pressure of 21 Inches Mercury Absolute and Inlet Temperature of 538 Degrees R

Description: The performance at inlet pressure of 21 inches mercury absolute and inlet temperature of 538 R for the 10-stage axial-flow X24C-2 compressor from the X24C-2 turbojet engine was investigated. the peak adiabatic temperature-rise efficiency for a given speed generally occurred at values of pressure coefficient fairly close to 0.35.For this compressor, the efficiency data at various speeds could be correlated on two converging curves by the use of a polytropic loss factor derived.
Date: July 15, 1947
Creator: Schum, Harold J. & Buckner, Howard A., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Performance of Allison Model 400-C6 Turbojet-Engine Compressor, 1: Over-All Performance Characteristics of Compressor at Equivalent Impeller Speeds of 6000, 7000, and 8500 RPM

Description: The Allison model 400-C6 compressor was operated at an inlet pressure of 12 inches of mercury absolute ana ambient inlet temperature at equivalent impeller speeds of 6000, 7000, and 8500 rpm. Additional runs at an equivalent speed of 7000 rpm and ambient inlet temperature were made at inlet pressures from 7 to 22 inches of mercury absolute. The results of this investigation are compared with those of the 533-A-23 compressors. For the speeds investigated, the Allison model 400-C6 compressor had … more
Date: December 15, 1948
Creator: Kovach, Karl & Withee, Joseph R., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of Various Blade Modifications on Performance of a 16-Stage Axial-Flow Compressor 3 - Effect on Over-All Performance Characteristics on Increasing Stator-Blade Angles in Inlet Stages

Description: The stator-blade angles in the first four stages of a 16-stage axial-flow compressor were increased in order to decrease the angles of attack of these stages, and thereby to improve part-speed performance. The performance of this modified compressor was compared with that of the same compressor with original blade angles.
Date: February 15, 1952
Creator: Medeiros, Arthur A. & Hatch, James E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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