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Automatic Isotope Mass Spectrometer : Job Specification JS-741, Rev. 2

Description: The following document analyzes the Automatic Isotope Mass Spectrometer that consists of a Laboratory Isotope Mass Spectrometer, covered by Union Carbide Nuclear Company Job Specification "JS-747", which has been modified to meet Union Carbide Nuclear Company Job Specification "JS-741", as well as the instrument's samples collected and analyzed.
Date: September 16, 1955
Creator: Union Carbide Nuclear Company
Partner: UNT Libraries Government Documents Department

CryoFree Final Report

Description: CryoFree, a gamma-ray spectrometer, has been built and successfully tested. This instrument is based on a planar germanium semiconductor detector and is optimized for high-resolution spectroscopy in the range of a 30 keV to a few hundred keV to detect U and Pu. The spectrometer is cooled with a mechanical cryocooler that obviates the need for liquid cryogen. Furthermore, the instrument is battery powered. The combination of mechanical cooling and battery operation allows high-resolution spectroscopy in a highly-portable field instrument. A description of the instrument along with its performance is given.
Date: November 7, 2006
Creator: Burks, M
Partner: UNT Libraries Government Documents Department

A Direct Current Emission Regulator

Description: The following report describes a current beam modulation designed to replace the standard regulator and to achieve an ion beam free from amplitude modulation.
Date: August 4, 1945
Creator: White, J. R. & Cameron, A. E.
Partner: UNT Libraries Government Documents Department

The Ion Velocitron

Description: This report analyzes the separation of ions using the velocity of the ion measured through a long evacuated drift tube.
Date: January 27, 1947
Creator: Cameron, A. E. & Eggers, D. F.
Partner: UNT Libraries Government Documents Department

Status of Compton recoil gamma-ray spectroscopy

Description: The gamma-ray component of the reactor radiation field can produce effects which impact strongly upon reactor design, shielding, and safety. Radiation effects arising from the gamma-ray component are induced by interaction of the absolute gamma-ray energy spectrum in the reactor environment. Hence, the most fundamental quantity underlying effects produced by the reactor gamma-ray field is the absolute gamma-ray energy continuum. To this end, the current status of Compton recoil gamma-ray spectrometry in Light Water Reactors (LWR) and Fast Breeder Reactors (FBR) environments is described. Particular emphasis is given to continuous gamma spectometry experiments in a LWR pressure vessel mockup at the Oak Ridge National Laboratory Poolside Critical Assembly (PCA). Gamma spectrometry plans for FBR environments are outlined with special attention placed on start-up experiments in the Fast Test Reactor (FTR). Improvements in Compton recoil gamma-ray spectroscopy are presented.
Date: May 1, 1979
Creator: Gold, R. & Kaiser, B.J.
Partner: UNT Libraries Government Documents Department

Multiparticle detector for ISABELLE

Description: The proposed multiparticle spectrometer is designed to study particles produced at small angles (0.5 < theta < 20 mr). It is assumed to be part of a larger set-up, where the larger angles are covered by other spectrometers, or at least a 4 pi detector, such as described by Arnold et al. (CRISP 72-65). The general layout consists of 4 magnets in a symmetrical arrangement. A set of proportional chambers downstream from the first set of magnets can measure both angle and momentum. Using a second pair of magnets, the momenta can be re- combined. Then all tracks will point back to the original interaction point in compact bundle, which may be suitable for particle identification by Cherenkov counters further downstream. (auth)
Date: November 1, 1973
Creator: Kirz, J.
Partner: UNT Libraries Government Documents Department

An imaging proton spectrometer for short-pulse laser plasma experiments

Description: Ultra intense short pulse laser pulses incident on solid targets can generate energetic protons. In additions to their potentially important applications such as in cancer treatments and proton fast ignition, these protons are essential to understand the complex physics of intense laser plasma interaction. To better characterize these laser-produced protons, we designed and constructed a novel, spatially imaging proton spectrometer that will not only measure proton energy distribution with high resolution, but also provide its angular characteristics. The information obtained from this spectrometer compliments those from commonly used diagnostics including radiochromic film packs, CR39 nuclear track detectors, and non-imaging magnetic spectrometers. The basic characterizations and sample data from this instrument are presented.
Date: May 11, 2010
Creator: Chen, H; Hazi, A; van Maren, R; Chen, S; Fuchs, J; Gauthier, M et al.
Partner: UNT Libraries Government Documents Department

Comparison of STIS and SNAP spectrograph throughputs

Description: This is a comparison of the measured throughput of STIS on HST versus what we might expect from the spectrograph on SNAP. The principle reference is Woodgate et al. (1998) PASP, 110, 1183. Additional material was taken from the STIS Handbook, available on-line at www.stsci.edu. The goal is to demonstrate that there are sound reasons to expect better performance for a SNAP spectrograph (even one with a grating) than would be expected by scaling from HST+STIS.
Date: June 30, 2002
Creator: Aldering, Greg
Partner: UNT Libraries Government Documents Department


Description: This third quarterly technical report discusses the progress made on a machine vision technique for determining coal content and ore grades. The work done this quarter has utilized a miniature imaging spectrometer. Procedures to collect and process the spectral and spatial data from the imaging spectrometer have been established, and software routines have been employed to use this data to differentiate sulfides from background rock in platinum/palladium core samples. These sulfides are indicator minerals for high-grade platinum/palladium ore. Mappings of the sulfides generated with this procedure have been quite accurate. Samples of coal have also been obtained and preliminary measurements with the imaging spectrometer have been made.
Date: April 25, 2002
Creator: Swanson, Dr. Rand
Partner: UNT Libraries Government Documents Department


Description: Analogy with optical instruments is used to develop formulas for estimating the counting rate achieved by a neutron time-of-flight system. lnput data consist of the flux at the spectrometer entrance and some of the physical characteristics of the spectrometer. Convenient relations for the comparison of different systems are presented. (auth)
Date: November 1, 1961
Creator: Stanford, G.S.
Partner: UNT Libraries Government Documents Department


Description: The report is divided into 4 major parts with several sections in each part. Separate abstracts were prepared for all sections in Parts I and II except 8 and 9 (containing information on mass spectrometry and microscopy). A summary of service analyses is given in Part III, and information concerning the ORNL master analytical manual is presented in Part IV; abstracts were not prepared for these. (J.R.D.)
Date: February 1, 1963
Partner: UNT Libraries Government Documents Department


Description: A double-focusing magnetic field for a spectrometer of the flat type which gives radial focusing to roughly the sixth order, and which utilizes azimuthal variation of the field coefficients, has been devised.
Date: April 6, 1966
Creator: Bergkvist, Karl-Erik & Sessler, Andrew M.
Partner: UNT Libraries Government Documents Department

Error Sources in the ETA Energy Analyzer Measurement

Description: At present the ETA beam energy as measured by the ETA energy analyzer and the DARHT spectrometer differ by {approx}12%. This discrepancy is due to two sources, an overestimate of the effective length of the ETA energy analyzer bending-field, and data reduction methods that are not valid. The discrepancy can be eliminated if we return to the original process of measuring the angular deflection of the beam and use a value of 43.2cm for the effective length of the axial field profile.
Date: December 13, 2004
Creator: Nexsen, W E
Partner: UNT Libraries Government Documents Department