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The effect of passive material on the detection of hadrons in calorimeter configurations for the SDC detector

Description: We have used a flexible geometry model of a calorimeter design for SDC to study the effect of passive material in front of the calorimeter and between the barrel and endcap modules on the apparent response to hadrons. The thicknesses of the passive materials have been chosen to closely resemble the currently projected wall thicknesses of the scintillating tile-fiber and liquid-argon calorimeter designs. The liquid-argon model contains about three times the amount of material in its shells compa… more
Date: August 14, 1991
Creator: Kirk, T. B. W. & Trost, H. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characteristics of multimuon events from fourth generation quarks at the SSC (superconducting super collider)

Description: Multimuon events can be a distinctive signature for pair production of t-quarks or 4th generation quarks at the SSC. In this paper we address aspects of the multimuon event topology relevant to detector design for the SSC. In particular, we discuss energy measurement, rapidity range, segmentation and the need for hadronic calorimetry in a dedicated muon detector.
Date: August 14, 1987
Creator: Baer, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Shower counter resolution scaling

Description: The EM shower counter for the SDC detector has a resolution expression containing two stochastic terms plus a constant term. Recent measurements clarifying the sources of these terms are presented here. 3 refs., 4 figs.
Date: October 14, 1991
Creator: Kirk, T.B.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Passive neutron-multiplication measurements

Description: We have developed an instrument to measure neutron multiplication by statistical analysis of the timing of neutrons emitted from fissionable material. This instrument is capable of repeated analysis of the same recorded data with selected algorithms, graphical displays showing statistical properties of the data, and preservation of raw data on disk for future comparisons. In our measurements we have made a comparison of the covariance to mean and Feynman variance to mean analysis algorithms to … more
Date: October 14, 1982
Creator: Zolnay, A.S.; Barnett, C.S. & Spracklen, H.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Energy deposition by high energy protons: comparison of theory and experiment. [HETC computer code]

Description: The ability of the HETC computer code to calculate energy deposited by proton beams of 0.8 to 28.5 GeV in composite targets was evaluated by comparing calculated results with experimental data. The experimental assembly consisted of /sup 238/U shower plates separated by an air gap from a CH/sub 2///sup 238/U detector plate. For protons in the range 0.8 to 5 GeV, HETC data on energy deposited can be considered accurate to a few tens of percent or better for the shower-plate part of the assembly … more
Date: May 14, 1980
Creator: Loewe, W. E. & Pollock, C. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Personnel neutron monitoring developments at LLL. [Development and calibration of various types of neutron detectors and monitors]

Description: Approximately 40 employees at LLL work in areas where personnel neutron monitoring is necessary. The dose rate in these areas is low, rarely exceeding 0.5 rem per year. However, the wide variety of neutron environments (dt neutron generators; a 3 MW pool type reactor; a 100 MeV electron Linac; and a number of vaults and glove boxes where alpha, n and spontaneous fission sources are stored) makes the neutron monitoring task difficult. As a result, we have been studying potential developments in … more
Date: November 14, 1978
Creator: Griffith, R.V.; Fisher, J.C.; Hankins, D.E. & Miller, D.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fast imaging applications in the Nuclear Test Program

Description: Applications of fast imaging employ both streak cameras and fast framing techniques. Image intensifier tubes are gated to provide fast two-dimensional shutters of 2 to 3 ns duration with shatter ratios of greater than 10/sup 6/ and resolution greater than 10/sup 4/ pixels. Shutters of less than 1 ns have been achieved with experimental tubes. Characterization data demonstrate the importance of tube and pulser design. Streak cameras are used to simultaneously record temporal and intensity inform… more
Date: October 14, 1983
Creator: Lear, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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RHIC detector beam-pipe pressures in time

Description: The pressures in baked an unbaked experimental beam-pipes are calculated as a function of time. These results exclude gas impact desorption effects stemming from, for example, species created by the colliding beams. Three general cases have been calculated: Case {number_sign}1: an unbaked system cryopumped by the 4.2{degree}K apertures of the DO magnets; Case {number_sign}4: an unbaked system pumped by the 4.2{degree}K apertures of the DO magnets, and with a 10,000 L/sec LHe cryopump located pr… more
Date: February 14, 1993
Creator: Welch, K. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Estimates of rates and errors for measurements of direct-. gamma. and direct-. gamma. + jet production by polarized protons at RHIC

Description: Studies of inclusive direct-{gamma} production by pp interactions at RHIC energies were performed. Rates and the associated uncertainties on spin-spin observables for this process were computed for the planned PHENIX and STAR detectors at energies between {radical}s = 50 and 500 GeV. Also, rates were computed for direct-{gamma} + jet production for the STAR detector. The goal was to study the gluon spin distribution functions with such measurements. Recommendations concerning the electromagneti… more
Date: August 14, 1992
Creator: Beddo, M. E.; Spinka, H. & Underwood, D. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Quality engineering and control semiannual progress report November and December 1976 and January--April 1977

Description: Research and development activities are reported on absorption spectroscopy, calorimetry, electrolysis, emission spectroscopy, fluorimetry gas chromatography, infrared spectroscopy, liquid chromatography, liquid scintillation counting, mass spectroscopy, microscopy, radiometric analysis, and thermal analysis. A group of miscellaneous projects are also described. (JRD)
Date: July 14, 1977
Creator: Carpenter, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fabrication of Cryogenic Manganite Bolometers to Measure the Total Energy at the LCLS Free Electron X-ray Laser

Description: We are developing cryogenic bolometers to measure the total energy of the Linac Coherent Light Source (LCLS) free electron X-ray laser that is currently being built at the Stanford Linear Accelerator Center. LCLS will produce ultrashort {approx}200 fs X-ray laser pulses with {approx}10{sup 13} photons at 0.8 keV up to {approx}10{sup 12} photons at 8 keV per pulse at a repeat interval as short as 8 ms, and will be accompanied by a halo of spontaneous undulator radiation. Our bolometer consists o… more
Date: June 14, 2008
Creator: Drury, O B; Yong, G J; Kolagani, R M; Liang, Y; Gardner, C; Ables, E et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Heavy Flavor Tracker for STAR

Description: We propose to construct a Heavy Flavor Tracker (HFT) for the STAR experiment at RHIC. The HFT will bring new physics capabilities to STAR and it will significantly enhance the physics capabilities of the STAR detector at central rapidities. The HFT will ensure that STAR will be able to take heavy flavor data at all luminosities attainable throughout the proposed RHIC II era.
Date: March 14, 2005
Creator: Xu, Z.; Chen, Y.; Kleinfelder, S.; Koohi, A.; Li, S.; Huang, H. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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105KE Basin Area Radiation Monitor System (ARMS) Acceptance Test Procedure

Description: This procedure is intended for the Area Radiation Monitoring System, ARMS, that is replacing the existing Programmable Input-Output Processing System, PIOPS, radiation monitoring system in the 105KE basin. The new system will be referred to as the 105KE ARMS, 105KE Area Radiation Monitoring System. This ATP will ensure calibration integrity of the 105KE radiation detector loops. Also, this ATP will test and document the display, printing, alarm output, alarm acknowledgement, upscale check, and … more
Date: December 14, 1999
Creator: Kinkel, C. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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RHIC detector beam-pipe pressures in time

Description: The pressures in baked an unbaked experimental beam-pipes are calculated as a function of time. These results exclude gas impact desorption effects stemming from, for example, species created by the colliding beams. Three general cases have been calculated: Case [number sign]1: an unbaked system cryopumped by the 4.2[degree]K apertures of the DO magnets; Case [number sign]4: an unbaked system pumped by the 4.2[degree]K apertures of the DO magnets, and with a 10,000 L/sec LHe cryopump located pr… more
Date: February 14, 1993
Creator: Welch, K.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Drift time variations in CdZnTe detectors measured with alpha-particles: Their correlation with the detector’s responses

Description: Homogeneity of properties related to material crystallinity is a critical parameter for achieving high-performance CdZnTe (CZT) radiation detectors. Unfortunately, this requirement is not always satisfied in today's commercial CZT material due to high concentrations of extended defects, in particular subgrain boundaries, which are believed to be part of the causes hampering the energy resolution and efficiency of CZT detectors. In the past, the effects of subgrain boundaries have been studied i… more
Date: May 14, 2012
Creator: E., Bolotnikov A.; Butcher, J.; Hamade, M.; Petryk, M.; Bolotnikov, A.; Camarda, G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Experiments to Determine the Radiation Stability of UN Dispersions in Stainless Steel

Description: A controlled radiation experiment was performed to determine the stability of fuel containing 28 wt.% UN dispersed in and clad with Type 318 stainless steel as compared with fuel containing 30 wt.% UO/sub 2/ dispersed in the same material. The specimens were prepared by hot rolling the fuel coupons in Type 318 stainless steel using the picture-frame technique for initial bonding and reduction. Final dimensions were obtained by cold rolling. A special radiation capsule was designed which contain… more
Date: June 14, 1960
Creator: Gates, John E.; Freas, David G.; Saling, James H. & Dickerson, Ronald F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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B-jet tagging using electrons at SDC

Description: This note examines b-jet tagging at SDC, using semileptonic b {r arrow} e{upsilon} X electron decays. The main application for this tagging capability would be in the study of Top decays. Thus, we consider Top decays in a reasonable'' mass range (e.g. 110 < Mtop < 170). For completeness, we also consider inclusive QCD production of b-quarks. We are mainly interested in the effects of hadron calorimeter segmentation on the electron efficiency, assuming that similar algorithms are used for electr… more
Date: August 14, 1991
Creator: Wicklund, A. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Prototype nickel component demonstration. Final report

Description: We have been developing a process to produce high-purity nickel structures from nickel carbonyl using chemical vapor deposition (CVD). The prototype demonstration effort had been separated into a number of independent tasks to allow Los Alamos National Laboratory (LANL) the greatest flexibility in tailoring the project to their needs. LANL selected three of the proposed tasks to be performed--Task 1- system modification and demonstration, Task 2-stainless steel mandrel trials, and Task 4-manufa… more
Date: November 14, 1994
Creator: Boss, D.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A program in detector development for the US synchrotron radiation community

Description: There is a clear gulf between the capabilities of modern synchrotrons to deliver high photon fluxes, and the capabilities of detectors to measure the resulting photon, electron or ion signals. While a huge investment has been made in storage ring technology, there has not to date been a commensurate investment in detector systems. With appropriate detector technology, gains in data rates could be 3 to 4 orders of magnitude in some cases. The US community working in detector technology is under-… more
Date: July 14, 2001
Creator: Thompson, A.; Mills, D.; Naday, S.; Gruner, S.; Siddons, P.; Arthur, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Serial interface controller

Description: The idea of building a Serial Interface Controller (SIC) proposed by Paul O`Connor, Instrumentation Division, BNL is to determine the feasibility of incorporating a Serial Interface Controlled CMOS IC`s for charge amplification, shaping, analog storage and multiplexing used in particle detectors for high energy physics experiments. The serial data pumped into the CMOS ICs will be used to control many circuit parameters like digitally controlled gain, shaping time, precision preamplifier calibra… more
Date: April 14, 1995
Creator: Kandasamy, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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