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Considerations on the Effect of Beam-Dee Coupling in a Cyclotron RF System
Analysis of the problem of accelerating ions in a Thomas cyclotron has been confined almost entirely to the integration of various equations of motion (for single particles) for which a complete field description is necessary. In contrast, the problem of principal interest to rf system engineers concerns the gross transfer of electrical energy from an rf generator into an accelerated beam.
Date:
July 14, 1952
Creator:
Wouters, L. F. (Louis Francis), 1921-
Object Type:
Report
System:
The UNT Digital Library
2010 Dry and 2009 - 2010 Wet Season Branchiopod Survey Report, Site 300
Lawrence Livermore National Laboratory (LLNL) requested that Condor Country Consulting, Inc. (CCCI) perform wet season surveys and manage the dry season sampling for listed branchiopods in two ponded locations within the Site 300 Experimental Test Site. Site 300 is located in Alameda and San Joaquin Counties, located between the Cities of Livermore and Tracy. The two pool locations have been identified for possible amphibian enhancement activities in support of the Compensation Plan for impacts tied to the Building 850 soil clean-up project. The Building 850 project design resulted in formal consultation with the U.S. Fish and Wildlife Service (USFWS) as an amendment (File 81420-2009-F-0235) to the site-wide Biological Opinion (BO) (File 1-1-02-F-0062) in the spring of 2009 and requires mitigation for the California tiger salamander (AMCA, Ambystoma californiense) and California red-legged frog (CRLF, Rana draytonii) habitat loss. Both pools contain breeding AMCA, but do not produce metamorphs due to limited hydroperiod. The pool to the southeast (Pool BC-FS-2) is the preferred site for amphibian enhancement activities, and the wetland to northwest (Pool OA-FS-1) is the alternate location for enhancement. However, prior to enhancement, LLNL has been directed by USFWS (BO Conservation Measure 17 iii) to 'conduct USFWS protocol-level branchiopod surveys …
Date:
March 14, 2011
Creator:
Dexter, W.
Object Type:
Report
System:
The UNT Digital Library
The Greensheet (Houston, Tex.), Vol. 43, No. 551, Ed. 1 Friday, December 14, 2012
Free weekly newspaper that includes business and classified advertising.
Date:
December 14, 2012
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 42, No. 443, Ed. 1 Friday, October 14, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
October 14, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 36, No. 431, Ed. 1 Friday, October 14, 2005
Free weekly newspaper that includes business and classified advertising.
Date:
October 14, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 37, No. 275, Ed. 1 Friday, July 14, 2006
Free weekly newspaper that includes business and classified advertising.
Date:
July 14, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Ed. 1 Friday, January 14, 2005
Free weekly newspaper that includes business and classified advertising.
Date:
January 14, 2005
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Preliminary report on shallow research drilling in the Salton Sea region
During two shallow thermal drilling programs, thermal measurements were obtained in 56 shallow (76.2 m) and one intermediate (457.3 m) depth holes located both onshore and offshore along the southern margin of the Salton Sea in the Imperial Valley, California. These data complete the surficial coverage of the thermal anomaly, revealing the shape and lateral extent of the hydrothermal system. The thermal data show the region of high thermal gradients to extend only a short distance offshore to the north of the Quaternary volcanic domes which are exposed along the southern shore of the Salton Sea. The central thermal anomaly has an arcuate shape, about 4 km wide and 12 km long. Across the center of the anomaly, the transition zone between locations exhibiting high thermal gradients and those exhibiting regional thermal gradients is quite narrow. Thermal gradients rise from near regional (0.09/degree/C/m) to extreme (0.83/degree/C/m) in only 2.4 km. The heat flow in the central part of the anomaly is greater than 600 mW/m/sup 2/ and in some areas exceeds 1200 mW/m/sup 2/. The shape of the thermal anomaly is asymmetric with respect to the line of volcanoes previously thought to represent the center of the field, with its …
Date:
January 14, 1988
Creator:
Newmark, R.L.; Kasameyer, P.W. & Younker, L.W.
Object Type:
Report
System:
The UNT Digital Library
Numerical Simulation of Premixed Turbulent Methane Combustion
With adaptive-grid computational methodologies and judicious use of compressible and low Mach number combustion models, we are carrying out three-dimensional, time-dependent direct numerical simulations of a laboratory-scale turbulent premixed methane burner. In the laboratory experiment, turbulence is generated by a grid located in the throat of a 50mm diameter circular nozzle; swirl is be introduced by four tangential air jets spaced uniformly around the circumference of the nozzle just above the turbulence grid. A premixed methane flame is stabilized above the nozzle in the central core region where a velocity deficit is induced7the swirling flow. The time-dependent flow field inside the nozzle, from the turbulence grid and the high-speed jets, to the nozzle exit plane is simulated using an adaptive-grid embedded-boundary compressible Navier-Stokes solver. The compressible calculation then provides time-dependent boundary conditions for an adaptive low Mach number model of the swirl-stabilized premixed flame. The low Mach model incorporates detailed chemical kinetics and species transport using 20 species and 84 reactions. Laboratory diagnostics available for comparisons include characterizations of the flow field just down stream of the nozzle exit plane, and flame surface statistics, such as mean location, wrinkling and crossing frequencies.
Date:
June 14, 2003
Creator:
Day, Marc S.; Bell, John B.; Almgren, Ann S.; Beckner, Vincent E.; Lijewski, Michael J.; Cheng, Robert et al.
Object Type:
Presentation
System:
The UNT Digital Library
The Garland News (Garland, Tex.), Vol. 54, No. 33, Ed. 1 Friday, November 14, 1941
Weekly newspaper from Garland, Texas that includes local, state, and national news along with advertising.
Date:
November 14, 1941
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Garland News. (Garland, Tex.), Vol. 19, No. 1, Ed. 1 Friday, April 14, 1905
Weekly newspaper from Garland, Texas that includes local, state, and national news along with advertising.
Date:
April 14, 1905
Creator:
Holford, Will A.
Object Type:
Newspaper
System:
The Portal to Texas History
Convairiety, Volume 12, Number 21, October 14, 1959
Bimonthly newsletter published for employees of the Convair Division in Fort Worth containing work-related information, updates about employees, and other news.
Date:
October 14, 1959
Creator:
General Dynamics Corporation. Convair Division.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Public Health and Border Security: HHS and DHS Should Further Strengthen Their Ability to Respond to TB Incidents
A letter report issued by the Government Accountability Office with an abstract that begins "In spring 2007, the Department of Health and Human Services (HHS), the Department of Homeland Security (DHS), and state and local health officials worked together to interdict two individuals with drug-resistant infectious tuberculosis (TB) from crossing U.S. borders and direct them to treatment. Concerns arose that HHS's and DHS's responses to the incidents were delayed and ineffective. GAO was asked to examine (1) the factors that affected HHS's and DHS's responses to the incidents, (2) the extent to which HHS and DHS made changes to response procedures as a result of the incidents, and (3) HHS's and DHS's efforts to assess the effectiveness of changes made as a result of the incidents. GAO reviewed agency documents and interviewed officials about the procedures in place at the time of the incidents and changes made since."
Date:
October 14, 2008
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Project Gasbuggy
From cover: "A feasibility study concerned with nuclear explosive stimulation of a natural gas reservoir, prepared by El Paso Natural Gas Company, the United States Atomic Energy Commission and the United States Bureau of Mines."
Date:
May 14, 1965
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Does MORSE-L really work
None
Date:
September 14, 1972
Creator:
Wilcox, T.
Object Type:
Report
System:
The UNT Digital Library
Electron beam--deuterated target experiment
None
Date:
June 14, 1974
Creator:
Freeman, B.L. Jr.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Using Nonlinear RF Acceleration for FEL Beam Conditioning
We consider a new approach to condition an electron beam using nonlinear effects in the RF field. We demonstrate that such effects can generate a desirable--for the FEL interaction--radial variation of the particle's energy in the beam, and calculate the induced energy spread in the limit of weak field.
Date:
December 14, 2005
Creator:
Stupakov, G. & Huang, Z.
Object Type:
Article
System:
The UNT Digital Library
Solid state nuclear magnetic resonance studies of cross polarization from quadrupolar nuclei
None
Date:
August 14, 1997
Creator:
De Paul, S.M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Optical timing receiver for the NASA laser ranging system. Part I. Constant-fraction discriminator
Position-resolution capabilities of the NASA laser ranging system are essentially determined by time-resolution capabilities of its optical timing receiver. The optical timing receiver consists of a fast photoelectric device, primarily a standard of microchannel-plate-type photomultiplier or an avalanche photodiode detector, a timing discriminator, a high-precision time-interval digitizer, and a signal-processing system. The time-resolution capabilities of the receiver are determined by the photoelectron time spread of the photoelectric device, the time walk and resolution characteristics of the timing discriminator, and the time-interval digitizer. It is thus necessary to evaluate available fast photoelectronic devices with respect to their time-resolution capabilities, and to design a very low time walk timing discriminator and a high-precision time digitizer which will be used in the laser ranging system receiver. (auth)
Date:
August 14, 1975
Creator:
Leskovar, B. & Lo, C.C.
Object Type:
Report
System:
The UNT Digital Library
H-Division quarterly report, April--June 1976. [Lawrence Livermore Laboratory]
The purview of H-Division is the mechanics of fluids and solid bodies. Concise status reports of the projects undertaken by the various groups in the division are given. Representative topics studied include equations of state of various materials, fracture mechanics, penetration of armor by projectiles, turbulence generation, and the development of dynamics computer codes. 31 figures, 2 tables. (RWR)
Date:
July 14, 1976
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Observation of Femtosecond Bunch Length Using a Transverse Deflecting Structure
The design of the VUV-FEL at DESY demands bunch lengths in the order of 50 fs and below. For the diagnostic of such very short bunches a transverse deflecting RF structure (LOLA) has been installed which streaks the beam according to the longitudinal distribution. Tests in the VUV-FEL yielded a rich substructure of the bunches. The most pronounced peak in the has a rms length of approximately 50 fs during FEL operation and below 20 fs FWHM at maximum compression. Depending on the transverse focusing a resolution well below 50 fs was achieved.
Date:
December 14, 2005
Creator:
Huning, Markus; Bolzmann, Andy; Schlarb, Holger; Frisch, Josef; McCormick, Douglas; Ross, Marc et al.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Urban Bellinghausen, February 14, 2014
The National Museum of the Pacific War presents an oral interview with Urban J. Bellinghausen. Bellinghausen was born on 3 March 1926 in Munday, Texas. He joined the Marine Corps on 15 June 1944. He attended boot camp at San Diego. Following that he had 3 more months training at Camp Pendleton. Then he deployed to the Pacific, a 33 day crossing from San Diego to Saipan, arriving 10 November 1944. He was attached to the 2nd Marine Division, 3rd Battalion, 10th Marines. While Saipan was in Allied hands, there were still some Japanese troops left to deal with. His unit then sailed to Iwo Jima but returned to Saipan. There they trained for the Okinawa invasion. In Okinawa, they participated in a decoy landing on D-Day minus 1, pulling Japanese forces away from the beaches where the actual landings took place. Never actually hitting the beach, Bellinghausen stayed on board the landing ship, eventually returning to Saipan. After the atomic bombs were dropped and the armistice signed, he was sent to Nagasaki for 10 months. Then he caught a ship at Sasebo for the States, arriving in San Diego 17 July 1946. He was discharged 10 days later.
Date:
February 14, 2014
Creator:
Bellinghausen, Urban
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Harold Clevenger, October 14, 2005
The National Museum of the Pacific War presents an oral interview with Harold Clevenger. Clevenger was born on 13 April 1922 and was drafted into the Army in October 1942. After completing basic training at Fort Benjamin Harrison, Indiana he was sent to Fort Bliss, Texas and assigned to the 31st mule pack troop of the Quartermaster Corps. He embarked on the USS General H. W. Butner (AP-113) in Baltimore and arrived at Bombay, India. He took a train to Camp Landis where he contracted a severe case of malaria. Upon recovering, he was transferred to the 5307th Composite Unit (Provisional), also known as Merrill’s Marauders, under the command of Brigadier General Frank Merrill. He describes some of his experiences at Camp Landis. He recalls his unit crossing the Ganges River with their mules on a train. In Burma, Clevenger remembers watching American 75mm howitzers firing upon Japanese troops in a valley. He also recalls he and his mule came under friendly fire on one occasion. He mentions in passing that he bought some jewelry from a woman in China. On 10 August 1944 the Marauders were consolidated into the 475th Infantry, which continued service in northern Burma. In September …
Date:
October 14, 2005
Creator:
Clevenger, Harold
Object Type:
Text
System:
The Portal to Texas History
Technology transfer package on seismic base isolation - Volume I
This Technology Transfer Package provides some detailed information for the U.S. Department of Energy (DOE) and its contractors about seismic base isolation. Intended users of this three-volume package are DOE Design and Safety Engineers as well as DOE Facility Managers who are responsible for reducing the effects of natural phenomena hazards (NPH), specifically earthquakes, on their facilities. The package was developed as part of DOE's efforts to study and implement techniques for protecting lives and property from the effects of natural phenomena and to support the International Decade for Natural Disaster Reduction. Volume I contains the proceedings of the Workshop on Seismic Base Isolation for Department of Energy Facilities held in Marina Del Rey, California, May 13-15, 1992.
Date:
February 14, 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library