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207,958 Matching Results

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Results: 1 - 24 of 207,958 next
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[Special Orders Number 102, Extract 1] (open access)

[Special Orders Number 102, Extract 1]

Special orders extract reassigning a list of Women Air Force Service Pilot members, having completed their training, to be transferred to new air base stations.
Date: September 9, 1943
Creator: 318th Army Air Forces Flying Training Detachment
Object Type: Text
System: The Portal to Texas History
[Account Statement for 37th Street Fish Market, August 1949] (open access)

[Account Statement for 37th Street Fish Market, August 1949]

Account statement for items sold to Mrs. D. W. Kempner in the month of August 1949 by 37th Street Fish Market, including crabs, pompano, trout fishes of total worth $15.03.
Date: September 1, 1949
Creator: 37th Street Fish Market
Object Type: Text
System: The Portal to Texas History
[Special Orders Number A-2265] (open access)

[Special Orders Number A-2265]

Special orders listing role re-assignments and reporting requirements of several officers in the Unites States Air Force, including Marjorie Wakeham.
Date: September 22, 1959
Creator: 3910th Combat Support Group
Object Type: Text
System: The Portal to Texas History
[Aircraft Delivery Memorandum] (open access)

[Aircraft Delivery Memorandum]

Orders for WASP Gayle D. Ewing to ferry an aircraft from Grand Prairie, Texas to Newark, New Jersey with specifications on the plane model, flight order, and instructions upon arrival at her destination. The order is signed by Captain Joe K. Bailey and Ben Handler for Captain William S. Kirkpatrick.
Date: September 11, 1944
Creator: 555th Army Air Forces Base Unit - 5th Ferrying Group
Object Type: Text
System: The Portal to Texas History
[Tennessee Health Studies Agreement] Releases of contaminants from Oak Ridge facilites and risks to public health (open access)

[Tennessee Health Studies Agreement] Releases of contaminants from Oak Ridge facilites and risks to public health

Tennessee Health Studies Agreement-Releases of Contaminants from Oak Ridge Facilities
Date: September 30, 1999
Creator: 741-0388, Patrick Lippford-Tennessee Department of Health (615)
Object Type: Report
System: The UNT Digital Library
[Invoice for Bill Rendered by A-B-C Racket Store, September 1948] (open access)

[Invoice for Bill Rendered by A-B-C Racket Store, September 1948]

Invoice for bill rendered by A-B-C Racket Store, including amount of $11.32. Written paid on October 12th, 1948.
Date: September 30, 1948
Creator: A-B-C Racket Store
Object Type: Text
System: The Portal to Texas History
[Order Form for A-B-C Racket Store, September 7, 1948] (open access)

[Order Form for A-B-C Racket Store, September 7, 1948]

Order form prepared for Daniel W. Kempner by A-B-C Racket Store for cleaning supplies, listing itemized charges and balance.
Date: September 7, 1948
Creator: A-B-C Racket Store
Object Type: Text
System: The Portal to Texas History
[Clipping: Female Pilots Hold Reunion in Sweetwater] (open access)

[Clipping: Female Pilots Hold Reunion in Sweetwater]

Newspaper clipping discussing a WASP reunion in Sweetwater, Texas, with some advertisements on the back.
Date: 1986-09?
Creator: A-J News Services
Object Type: Clipping
System: The Portal to Texas History
The A.B.C. "Robin" (British): A Single-Seat Cabin Monoplane (open access)

The A.B.C. "Robin" (British): A Single-Seat Cabin Monoplane

Report discussing the A.B.C. Motors Robin, a single-seat monoplane that was built for pilot comfort, speed, and fuel efficiency. Information about the structural design, dimensions, weight, performance, and rough blueprints is included.
Date: September 1929
Creator: A. B. C. Motors
Object Type: Report
System: The UNT Digital Library
Space-charge compensation in high-intensity proton rings (open access)

Space-charge compensation in high-intensity proton rings

Recently, it was proposed to use negatively charged electron beams for compensation of beam-beam effects due to protons in the Tevatron collider. The authors show that a similar compensation is possible in space-charge dominated low energy proton beams. The idea has a potential of several-fold increase of the FNAL Booster beam brightness. Best results will be obtained using three electron lenses around the machine circumference, using co-moving electron beam with time structure and profile approximately matched to the proton beam. This technique, if feasible, will be more cost effective than the straightforward alternative of increasing the energy of the injection linac.
Date: September 21, 2000
Creator: A. Burov, G.W. Foster and V.D. Shiltsev
Object Type: Report
System: The UNT Digital Library
Production and Testing Experience with the SRF Cavities for the CEBAF 12 GeV Upgrade (open access)

Production and Testing Experience with the SRF Cavities for the CEBAF 12 GeV Upgrade

The CEBAF recirculating CW electron linear accelerator at Jefferson Lab is presently undergoing a major upgrade to 12 GeV. This project includes the fabrication, preparation, and testing of 80 new 7-cell SRF cavities, followed by their incorporation into ten new cryomodules for subsequent testing and installation. In order to maximize the cavity Q over the full operable dynamic range in CEBAF (as high as 25 MV/m), the decision was taken to apply a streamlined preparation process that includes a final light temperature-controlled electropolish of the rf surface over the vendor-provided bulk BCP etch. Cavity processing work began at JLab in September 2010 and will continue through December 2011. The excellent performance results are exceeding project requirements and indicate a fabrication and preparation process that is stable and well controlled. The cavity production and performance experience to date will be summarized and lessons learned reported to the community.
Date: September 1, 2011
Creator: A. Burrill, G.K. Davis, F. Marhauser, C.E. Reece, A.V. Reilly, M. Stirbet
Object Type: Article
System: The UNT Digital Library
[Invoice for Repairs from A. J. Warren, September 24, 1957] (open access)

[Invoice for Repairs from A. J. Warren, September 24, 1957]

Invoice for repairs made by A. J. Warren for Mrs. F. K. Adoue, including replacing a 40-gallon water heater, repairing valves, tapping 3 radiators for bleeder cocks, and repairing leaks on the heating pipe for $278.60, stamped paid on the 14th of October, 1957.
Date: September 24, 1957
Creator: A. J. Warren Plumbing and Heating
Object Type: Text
System: The Portal to Texas History
The Muon LINAC for the International Design Study of the Neutrino Factory (open access)

The Muon LINAC for the International Design Study of the Neutrino Factory

The first stage of muon acceleration in the Neutrino Factory utilises a superconducting linac to accelerate muons from 244 MeV to 900 MeV. The linac was split into three types of cryomodules with decreasing magnetic fields and increasing amounts of RF voltage but with the design of the superconducting solenoid and RF cavities being the same for all cryomodules. The current status of the muon linac for the International Design Study for the Neutrino Factory will be presented including a final lattice design of the linac and tracking simulations.
Date: September 1, 2011
Creator: A. Kurup, C. Bontoiu, Morteza Aslaninejad, J. Pozimski, A. Bogacz, V.S. Morozov, Y.R. Roblin, K.B. Beard
Object Type: Article
System: The UNT Digital Library
INTRINSIC RESIDUAL STRESSES IN METAL FILMS SYNTHESIZED BY ENERGETIC PARTICLE DEPOSITION (open access)

INTRINSIC RESIDUAL STRESSES IN METAL FILMS SYNTHESIZED BY ENERGETIC PARTICLE DEPOSITION

None
Date: September 15, 2000
Creator: A. MISRA, M. NASTASI
Object Type: Article
System: The UNT Digital Library
[Federal Building with Crane]

[Federal Building with Crane]

Photograph of the North side of the Brownsville U.S. court house and post office, a large four-story brick and stone building with three rows of rectangular windows and thee archways in the middle of the ground floor. There is a crane next to it on the right and on the left there is a long temporary structure running parallel to the road.
Date: September 2, 1932
Creator: A. Rogers Studio
Object Type: Photograph
System: The Portal to Texas History
[U.S. Court House in Brownsville]

[U.S. Court House in Brownsville]

Photograph of construction on the U.S. court house and post office, a four-story brick building, taken from across the street. The pavement in front of the building is torn up with some wooden scaffolding visible on the right and in the foreground several workers can be seen sitting on the sidewalk on the other side of the street. On the left part of a storefront can be seen and there are several street lamps and telephone lines visible in front of the building.
Date: September 2, 1932
Creator: A. Rogers Studio
Object Type: Photograph
System: The Portal to Texas History
Novel Source Ionizer Options for Polarized Ions (open access)

Novel Source Ionizer Options for Polarized Ions

N/A
Date: September 1, 2000
Creator: A., Hershcovitch
Object Type: Report
System: The UNT Digital Library
The polarized hydrogen jet target measurements at RHIC (open access)

The polarized hydrogen jet target measurements at RHIC

N/A
Date: September 9, 2013
Creator: A., Poblaguev; Aschenauer, E.; Atoian, G.; Basilevsky, A. Eyser, K.O.; Huang, H.; Makdisi, Y. et al.
Object Type: Article
System: The UNT Digital Library
CW Mode of Operation of a Proton FFAG Accelerator (open access)

CW Mode of Operation of a Proton FFAG Accelerator

N/A
Date: September 1, 2005
Creator: A., Ruggiero
Object Type: Report
System: The UNT Digital Library
The RHIC polarized source upgrade (open access)

The RHIC polarized source upgrade

N/A
Date: September 29, 2013
Creator: A., Zelenski; Atoian, G.; Raparia, D.; Ritter, J.; Steski, D.; Klenov, V. et al.
Object Type: Article
System: The UNT Digital Library
RF and structural characterization of new SRF films (open access)

RF and structural characterization of new SRF films

In the past years, energetic vacuum deposition methods have been developed in different laboratories to improve Nb/Cu technology for superconducting cavities. Jefferson Lab is pursuing energetic condensation deposition via Electron Cyclotron Resonance. As part of this study, the influence of the deposition energy on the material and RF properties of the Nb thin film is investigated. The film surface and structure analyses are conducted with various techniques like X-ray diffraction, Transmission Electron Microscopy, Auger Electron Spectroscopy and RHEED. The microwave properties of the films are characterized on 50 mm disk samples with a 7.5 GHz surface impedance characterization system. This paper presents surface impedance measurements in correlation with surface and material characterization for Nb films produced on copper substrates with different bias voltages and also highlights emerging opportunities for developing multilayer SRF films with a new deposition system.
Date: September 1, 2009
Creator: A.-M. Valente-Feliciano,H. L. Phillips,C. E. Reece,X. Zhao,D. Gu,R. Lukaszew,B. Xiao,K. Seo
Object Type: Article
System: The UNT Digital Library
Effects of the Thickness of Niobium Surface Oxide Layers on Field Emission (open access)

Effects of the Thickness of Niobium Surface Oxide Layers on Field Emission

Field emission on the inner surfaces of niobium superconducting radio frequency cavities is still one of the major obstacles for reaching high accelerating gradients for SRF community. Our previous experimental results* seemed to imply that the threshold of field emission was related to the thickness of Nb surface oxide layers. In this contribution, a more detailed study on the influences of the surface oxide layers on the field emission on Nb surfaces will be reported. By anodization technique, the thickness of the surface pentoxide layer was artificially fabricated from 3 nm up to 460 nm. A home-made scanning field emission microscope was employed to perform the scans on the surfaces. Emitters were characterized using a scanning electron microscope together with an energy dispersive x-ray analyzer. The SFEM experimental results were analyzed in terms of surface morphology and oxide thickness of Nb samples and chemical composition and geographic shape of the emitters. A model based on the classic electromagnetic theory was developed trying to understand the experimental results. Possibly implications for Nb SRF cavity applications from this study will be discussed.
Date: September 1, 2011
Creator: A.T. Wu, S. Jin, J.D. Mammosser, R.A. Rimmer, X.Y. Lu, K. Zhao
Object Type: Article
System: The UNT Digital Library
Fastest Electropolishing Technique on Niobium for Particle Accelerators (open access)

Fastest Electropolishing Technique on Niobium for Particle Accelerators

Field emission on the inner surfaces of niobium (Nb) superconducting radio frequency (SRF) cavities is still one of the major obstacles for reaching high accelerating gradients for SRF community. Our previous experimental results [1] seemed to imply that the threshold of field emission was related to the thickness of Nb surface oxide layers. In this contribution, a more detailed study on the influences of the surface oxide layers on the field emission on Nb surfaces will be reported. By anodization technique, the thickness of the surface pentoxide layer was artificially fabricated from 3nm up to 460nm. A home-made scanning field emission microscope (SFEM) was employed to perform the scans on the surfaces. Emitters were characterized using a scanning electron microscope together with an energy dispersive x-ray analyzer. The experimental results could be understood by a simple model calculation based on classic electromagnetic theory as shown in Ref.1. Possibly implications for Nb SRF cavity applications from this study will be discussed.
Date: September 1, 2011
Creator: A.T. Wu, S. Jin, R.A. Rimmer, X.Y. Lu, K. Zhao
Object Type: Article
System: The UNT Digital Library
Location Algorithms and Errors in Time-of-Arrival Systems (open access)

Location Algorithms and Errors in Time-of-Arrival Systems

This report describes least squares solution methods and linearized estimates of solution errors caused by data errors. These methods are applied to event locating systems which use time-of-arrival (TOA) data. Analyses are presented for algorithms that use the TOA data in a ''direct'' manner and for algorithms utilizing Time-of-arrival Squared (TSQ) methods. Location and error estimation results were applied to a ''typical'' satellite TOA detecting system. Using Monte Carlo methods, it was found that the linearized location error estimates were valid for random data errors with relatively large variances and relatively poor event/sensor geometries. In addition to least squares methods, which use an L{sub 2} norm, methods were described for L{sub 1} and L{sub {infinity}} norms. In general, these latter norms offered little improvement over least squares methods. Reduction of the location error variances can be effected by using information in addition to the TOA data themselves by adding judiciously chosen ''conditioning'' equation(s) to the least squares system. However, the added information can adversely affect the mean errors. Also, conditioned systems may offer location solutions where nonconditioned scenarios may not be solvable. Solution methods and linearized error estimates are given for ''conditioned'' systems. It was found that for significant data …
Date: September 1, 2001
Creator: AARONSON, EUGENE A.
Object Type: Report
System: The UNT Digital Library