WorldCat Identities

Argonne National Laboratory High Energy Physics Division

Overview
Works: 128 works in 165 publications in 1 language and 421 library holdings
Genres: Conference proceedings 
Roles: Researcher
Classifications: QC794.6.C6, 539.756
Publication Timeline
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Publications about Argonne National Laboratory Publications about Argonne National Laboratory
Publications by Argonne National Laboratory Publications by Argonne National Laboratory
Most widely held works about Argonne National Laboratory
 
Most widely held works by Argonne National Laboratory
Deep inelastic scattering and QCD : 5th international workshop, Chicago, IL April 1997 ( )
1 edition published in 1997 in English and held by 116 WorldCat member libraries worldwide
New directions in hadron spectroscopy : proceedings of the Summer Symposium held at Argonne National Laboratory, July 7-10, 1975 by Summer Symposium on New Directions in Hadron Spectroscopy (1975 : Argonne National Laboratory) ( Book )
4 editions published in 1975 in English and held by 22 WorldCat member libraries worldwide
Proceedings of the Symposium on Experiments Using Enriched Antiproton, Polarized Proton, and Polarized Antiproton Beams at Fermilab Energies : June 10, 1977 by Polarized Proton, and Polarized Antiproton Beams at Fermilab Energies Symposium on Experiments Using Enriched Antiproton ( Book )
2 editions published in 1977 in English and held by 18 WorldCat member libraries worldwide
Planning for the future : zero gradient synchrotron workshops, Summer 1971 ( Book )
2 editions published in 1972 in English and held by 10 WorldCat member libraries worldwide
Experimental results for high-energy polarization asymmetry ( )
2 editions published in 1991 in English and held by 5 WorldCat member libraries worldwide
We summarize activities with experiments using polarized protons and polarized antiprotons along with some recent interesting polarization phenomena
Measurement of radiation dose using radiochromic film ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
We have irradiated samples of radiochromic film to doses between 0.005 and lMrad in a Co⁶° facility at ANL. The doses computed using the manufacturer's calibration curves for the absorption at 600 and 510 nm have been compared with the dose obtained from ion chamber measurements. Excellent agreement is obtained and high precision can be maintained by baseline measurement of the films prior to irradiation, appropriate choice of film and wavelength used
The prospects for polarized target materials with pure carbon background ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
None of the materials presently in common use for polarized proton targets has a pure carbon nuclear background. The alcohols and diols contain some oxygen, and the ammonia and amine-based materials contain nitrogen and/or other noncarbon species. In the latter cases the noncarbon nuclei are measurably polarized as a concomitant of the process used to polarize the hydrogen nuclei. The relative simplicity of a pure carbon background would be advantageous for most types of scattering experiments and perhaps crucial for some. In addition to simplifying the kinematics of background events, pure carbon is relatively easy to prepare as a dummy'' target for background subtraction. Also, in such a target material, [sup 13]C-enrichment would yield a clean polarized [sup 13]C material. In this note I explore the possibilities for such materials, touching upon only what I consider to be the high'' points. The subject matter is capable of nearly endless ramification and speculation. In fact, owing to a general lack of relevant experimental data, even this relatively brief note contains much that is speculative to some degree
Calibration of the LAMPF E-960 polarized target ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
This note is mainly about the offline corrections for the target polarization measurements of E-960. For the sake of minimizing the number of separate documents, I have also included my recent thoughts about the target constant, in Sec. 6. The E-960 data-taking was done in two separate runs. With respect to having an operative NMR system, the runs dated from 27-AUG-87 to 10-DEC-87 and from 14-AUG-88 to 6-OCT-88. These runs will be referred to as the ''1987'' and ''1988'' runs, respectively. Because of the press of intervening projects, I have been unable until now to give my attention to the 1988 run of E-960. The information developed below in Secs. 3--5 is the result of my (belated) attempt to do so. A draft memo dated January 4, 1988 was previously distributed, which concerned the polarization correction factors for the 1987 run. I have reproduced the material from that memo in Sec. 2, for the sake of completeness. Also, since the analysis of the 1988 run has raised some questions about the appropriateness of the older analysis, I have augmented the material from that memo with some of the background observations and calculations that underlay its conclusions, to facilitate a comparison of the two runs. In Sec. 4 I have made a final synthesis of the observations made during the two runs, and it is there that one wig find my best estimate of the offline polarization corrections for both runs
On the scattering of atmospheric muons in the rock above Soudan 2 ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
I have investigated the effect of scattering in the rock overburden on the position and direction of atmospheric muons as observed at the Soudan 2 detector relative to the surface. The dominant contributions to the fluctuations in those observables arise from multiple Coulomb scattering and delta ray production. The contribution of the other energy loss mechanisms, bremsstrahlung, pair production and nuclear interactions, is small, with slowly increasing importance at very large deviations from the means of the distributions
A proof-of-concept implementation of persistence in a hierarchical storage system ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
The concept of providing transparent access to a collection of files in a mass storage system is a familiar one. The goal of this project was to investigate the feasibility of providing similar access to a collection of persistent, complex objects. We describe an architecture for interfacing a persistent store of complex objects to a hierarchical storage system. Persistent object stores support the uniform creation, storage, and access of complex objects, regardless of their lifetimes. In other words, a mechanism is provided so that persistent objects outlive the processes which create them and can be accessed in a uniform manner by other processes. We validated this architecture by implementing a proof-of-concept system and testing the system on two stores of data. These tests indicate that this architecture supports the creation. storage and access of very large persistent object stores
Unix version of CALOR89 for calorimeter applications ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
CALOR89 is a system of coupled Monte Carlo particle transport computer codes which has been successfully employed for the estimation of calorimeter parameters in High Energy Physics. In the past CALOR89 has been running on various IBM machines and on CRAY X-MP at Lawrence Livermore Lab. These machines had non-unix operating systems. In this report we present a UNIX version of CALOR89, which is especially suited for the UNIX work stations. Moreover CALOR89 is also been supplemented with two new program packages which makes it more user friendly. CALPREP is a program for the preparation of the input files for CALOR89 in general geometry and ANALYZ is an analysis package to extract the final results from CALOR89 relevant to calorimeters. This report also provides two script files LCALOR and PCALOR. LCALOR runs CALOR89 sequences of programs and EGS4 for a given configuration sequentially on a single processor and PCALOR concurrently on a multiprocessor unix workstation
Estimates of the neutron fluence for the SDC detector ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
The high energy and high luminosity of SSC cause radiation problems to detectors. Almost all the radiation in the SDC detector comes from the 20 TeV on 20 Tev pp collisions. The design luminosity corresponds to 10⁸ collisions per second. This luminosity is maintained for 10⁷ seconds (one SSC year). It is important to know the radiation fields experienced by the tracking volume, calorimeter, electronics and the phototubes. The loss of light due to the radiation damage to the scintillators can adversely affect the physics performance of the calorimeter. Studies have been carried out earlier to estimate the radiation dose in the SDC detector. In this note we use ISAJET in combination with CALOR89 to make an accurate prediction of neutron fluence at the various locations of the SDC detector. The low energy neutron fluence is important because of their large activation cross sections. In CALOR89 the low energy neutron fluence is accurately estimated by MORSE code
The electromagnetic calorimeter for the STAR experiment at RHIC ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
The STAR detector at RHIC can be used both for searches for quark-gluon plasma and for high energy pp spin physics. An electromagnetic calorimeter is being planned which will be used for triggering on High pt direct gammas, e{sup {plus_minus}}, and the electromagnetic component of jets. Jets will be measured for both kinds of physics by using the electro-magnetic calorimeter and central TPC tracking. We describe some features of the fiber-tile calorimeter as it is presently being designed
A high current, short pulse electron source for wakefield accelerators ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
Design studies for the generation of a high current, short pulse electron source for the Argonne Wakefield Accelerator are presented. An L-band laser photocathode rf gun cavity is designed using the computer code URMEL to maximize the electric field on the cathode surface for fixed frequency and rf input power. A new technique using a curved incoming laser wavefront to minimize the space charge effect near the photocathode is studied. A preaccelerator with large iris to minimize wakefield effects is used to boost the drive beam to a useful energy of around 20 MeV for wakefield acceleration experiments. Focusing in the photocathode gun and the preaccelerator is accomplished with solenoids. Beam dynamics simulations throughout the preaccelerator are performed using particle simulation codes TBCI-SF and PARMELA. An example providing a useful set of operation parameters for the Argonne Wakefield Accelerator is given. The effects of the sagitta of the curved beam and laser amplitude and timing jitter effects are discussed. Measurement results of low rf power level bench tests and a high power test for the gun cavity are presented and discussed
High Energy Physics Division semiannual report of research activities, July 1, 1991--December 31, 1991 ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
This report describes the research conducted in the High Energy Physics Division of Argonne National Laboratory during the period of July 1, 1991--December 31, 1991. Topics covered here include experimental and theoretical particle physics, advanced accelerator physics, detector development, and experimental facilities research. Lists of division publications and colloquia are included
A streamlined method for chiral fermions on the lattice ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
We discussed the use of renormalization counterterms to restore the chiral gauge symmetry in a lattice theory of Wilson fermions. We show that a large class of counterterms can be implemented automatically by making a simple modification to the fermion determinant
Finite element analysis of the SDC barrel and endcap calorimeters ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
In designing the SCD barrel and endcap calorimeters, the inter-module connecting forces must be known in order to determine the required size and number of connecting links between modules, and in order to understand how individual modules will be affected by these forces when assembled to form a full barrel and endcap. The connecting forces were found by analyzing three-dimensional Finite Element Models of both the barrel and endcap. This paper is divided into two parts, the first part will describe in detail the results of the barrel analysis and the second part will describe the results obtained from the endcap analysis. A similar approach was used in constructing the models for both analysis
Precision of source response inside dimpled HAD brass tubes ( )
2 editions published in 1993 in English and held by 5 WorldCat member libraries worldwide
We have measured the variation in response of the ¹³⁷CS source as positioned in 10 samples of the brass source tubes, dimpled at ±5 cm from the center of a scintillator tile. We find an RMS in the signals of 2.5%
Constraints on the gluon density from bottom quark and prompt photon production ( )
2 editions published in 1992 in English and held by 5 WorldCat member libraries worldwide
In next-to-leading order quantum chromodynamics, gluon-gluon interactions dominate the production of bottom quarks at hadron collider energies, and gluon-quark interactions control inclusive prompt photon production at large transverse momentum in pp collisions at fixed-target energies. Using such data, in conjunction with data from deep inelastic lepton scattering, we determine a new gluon density whose shape differs substantially from that derived from previous fits of data. The new set of parton densities provides a good fit to bottom quark, prompt photon, and deep inelastic data, including the most recent NMC and CCFR results
Shower counter resolution scaling ( )
2 editions published in 1991 in English and held by 5 WorldCat member libraries worldwide
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
 
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