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HIGH ENERGY HADRON POLARIMETRY.

Description: Proton polarimetry at RHIC uses the interference of electromagnetic (EM) and hadronic scattering amplitudes. The EM spin-flip amplitude for protons is responsible for the proton's anomalous magnetic moment, and is large. This then generates a significant analyzing power for small angle elastic scattering. RHIC polarimetry has reached a 5% uncertainty on the beam polarization, and seem capable of reducing this uncertainty further. Polarized neutron beams ax also interesting for RHIC and for a po… more
Date: September 10, 2007
Creator: BUNCE,G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutron Beams from Deuteron Breakup at the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory

Description: Accelerator-based neutron sources offer many advantages, in particular tunability of the neutron beam in energy and width to match the needs of the application. Using a recently constructed neutron beam line at the 88-Inch Cyclotron at LBNL, tunable high-intensity sources of quasi-monoenergetic and broad spectrum neutrons from deuteron breakup are under development for a variety of applications.
Date: July 31, 2007
Creator: McMahan, M. A.; Ahle, L.; Bleuel, D. L.; Bernstein, L.; Braquest, B. R.; Cerny, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Prospects for Acceleration of Deuterons and Helions.

Description: In order to study the spin structure of the neutron at high energy, a beam rich in polarized neutrons needs to be developed. The neutron has no charge and cannot be accelerated, so either deuterons or helions must be considered. When it comes to spin manipulation and stability of the polarization in a circular accelerator, it is the anomalous part of the magnetic moment which is important. If the anomaly is too small, then manipulation becomes difficult as in the case of deuterons--spin rotator… more
Date: September 10, 2007
Creator: MacKay, W. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mechanical Design and Analysis of a 200 MHz, Bolt-together RFQ forthe Accelerator Driven Neutron Source

Description: A high-yield neutron source to screen sea-land cargocontainers for shielded Special Nuclear Materials (SNM) has been designedat LBNL [1,2]. The Accelerator-Driven Neutron Source (ADNS) uses theD(d,n)3He reaction to create a forward directed neutron beam. Keycomponents are a high-current radio-frequency quadrupole (RFQ)accelerator and a high-power target capable of producing a neutron fluxof>107 n/(cm2 cdot s) at a distance of 2.5 m. The mechanical designand analysis of the four-module, bolt-tog… more
Date: June 20, 2007
Creator: Virostek, Steve; Hoff, Matt; Li, Derun; Staples, John & Wells,Russell
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pulsed Neutron Measurments With A DT Neutron Generator for an Annular HEU Uranium Metal Casting

Description: Measurements were performed with a single annular, stainless-steel-canned casting of uranium (93.17 wt% 235U) metal ( ~18 kg) to provide data to verify calculational methods for criticality safety. The measurements used a small portable DT generator with an embedded alpha detector to time and directionally tag the neutrons from the generator. The center of the time and directional tagged neutron beam was perpendicular to the axis of the casting. The radiation detectors were 1x1x6 in plastic sci… more
Date: September 1, 2007
Creator: Mihalczo, John T; Archer, Daniel E; Wright, Michael C & Mullens, James Allen
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Neutron Scattering Studies of Fundamental Processes in Earth Materials, Final Report

Description: The aim of this work was to use neutron scattering techniques to explore the dynamics and structure of water in rock samples. The dynamics of water in rock at low (residual) saturation are directly related to the transport properties of fluids within the host rock. The structure of water in rock may be related to the elastic behavior of the rock, which in many cases is nonlinear and hysteretic. Neutron scattering techniques allow us to study water in intact rock samples at both the molecular an… more
Date: June 11, 2007
Creator: McCall, K. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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