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Study of radiative blast waves generated on the Z-beamlet laser.

Description: This document describes the original goals of the project to study the Vishniac Overstability on blast waves produced using the Z-Beamlet laser facility as well as the actual results. The proposed work was to build on earlier work on the facility and result in the best characterized set of data for such phenomena in the laboratory. To accomplish the goals it was necessary to modify the existing probe laser at the facility so that it could take multiple images over the course of 1-2 microseconds. Troubles with modifying the probe laser are detailed as well as the work that went into said modifications. The probe laser modification ended up taking the entire length of the project and were the major accomplishment of the research.
Date: February 1, 2012
Creator: Edens, Aaron D. & Schwarz, Jens
Partner: UNT Libraries Government Documents Department

SATIF-2 shielding aspects of accelerators, targets and irradiation facilities

Description: Particle accelerators have evolved over the last 50 years from simple devices to powerful machines, and will continue to have an important impact on research, technology and lifestyle. Today they cover a wide range of applications, from television and computer displays in households to the investigation of the origin and structure of matter. It has become common practice to use them for material science and medical applications. In recent years, requirements from new technological and research applications have emerged, such as increased particle beams intensities, higher flexibility, etc., giving rise to new radiation shielding aspects and problems. These proceedings review recent progress in radiation shielding of accelerator facilities, and evaluate advancements with respect to international co-operation in this field.
Date: December 31, 1995
Partner: UNT Libraries Government Documents Department

Brookhaven National Laboratory (BNL) Proton Beam Characteristics and Dynamics: A First Look

Description: This report is the first in a series addressing issues that affect the quantitative conclusions of proton radiographic analysis. In this paper we begin studying the dynamics and measurement of the proton beam profile. We conclude with a plan for further study.
Date: August 1, 2000
Creator: Vixie, K.R. & Sandine, G.L.
Partner: UNT Libraries Government Documents Department

Muon Collider Overview: Progress and Future Plans

Description: Besides continued work on the parameters of a 3-4 and 0.5 TeV center of mass (COM) collider, many studies are now concentrating on a machine near 100 GeV (COM) that could be a factory for the s-channel production of Higgs particles. We mention the research on the various com- ponents in such muon colliders, starting from the proton accelerator needed to generate pions from a heavy-Z tar- get and proceeding through the phase rotation and decay ({pi}{yields}{mu}{nu}<sub>{mu}</sub>) channel, muon cooling, acceleration storage in a collider ring and the collider detector. We also men- tion theoretical and experimental R & D plans for the next several years that should lead to a better understanding of the design and feasibility issues for all of the components. This note is a summary of a report[l] updating the progress on the R & D since the Feasibility Study of Muon Colliders presented at the Workshop Snowmass'96.[2]
Date: June 1, 1998
Creator: Gallardo, J.; Palmer, R.; Sessler, A. & Tollestrup, A.
Partner: UNT Libraries Government Documents Department

Re-alignment: It is the tunnel floor which moves, isn`t it?

Description: It is shown that on the months to years time scale, accelerator tunnels built in compacted geological strata exhibit a movement of the floor systematic (unidirectional) in each point. Attempts to characterize the movement through one global number (a <rms> deviation) based on a random model are conceptionally wrong and can only lead to erroneous design decisions for future accelerators. In the extrapolation limit, differences are especially pronounced for differential movements in the case of short (days) time spans, and for accumulated movements in the case of long (years) time spans.
Date: October 1, 1995
Creator: Pitthan, R.
Partner: UNT Libraries Government Documents Department

[Materials Research Collaborative Access Team] Final Report - DOE Grant No.DEFG0200ER45811

Description: Operations Funding for the Materials Research Collaborative Access Team. In the proposal they presented five specific objectives for the MR-CAT Insertion Device beam line: (1) enable the accomplishment of the best possible science at MR-CAT; (2) facilitate efficient set-up and operations of a variety of complex materials-related experiments; (3) open the beamlines' facilities to scientists and science projects from non-traditional backgrounds and disciplines, respectively; (4) enable efficient 24 hour use of the beamline through interdisciplinary research teams and appropriate operations support; and (5) develop selected operations modes in support of the MR-CAT institutions, DOE collaborators, and general users.
Date: May 2, 2004
Creator: Segre, Carlo
Partner: UNT Libraries Government Documents Department

On-line computer facility and operating system COSACS at the ANL fast neutron generator

Description: An on-line/off-line computer system has been dnstalled at the ANL fast neutron generator (FNG) for on-line data acquisition and storage, and for off- line data reduction and evaluation. An operating system called COSACS has been written specifically for the installation. The present report describes all available hardware and software, but emphasizes those aspects of both that were tailored for this application. The various physicaldata channels, both input and output, are discussed with regard to transfer rates, bit formats, and interrupt control. The general relationship and areas of compatibility of COSACS with standard compilers and assemblers are discussed. A complete tabulation is given of operations available under COSACS, together with their input/output formats. (auth)
Date: August 1, 1973
Creator: Poenitz, W.P. & Whalen, J.F.
Partner: UNT Libraries Government Documents Department

Transverse spin with high energy polarized beams at an EIC

Description: Electron Ion Collider is a future facility with polarised beams that will enable us to study three-dimensional structure of the proton. I discuss future experiments at EIC and advantages of the new facility. TMD evolution and interplay between TMD and collinear factorization can be studied at EIC.
Date: November 1, 2010
Creator: Prokudin, Alexey
Partner: UNT Libraries Government Documents Department

Technical Design of Hadron Therapy Facilities

Description: Radiation therapy with hadron beams now has a 40-year track record at many accelerator laboratories around the world, essentially all of these originally physics-research oriented. The great promise shown for treating cancer has led the medical community to seek dedicated accelerator facilities in a hospital setting, where more rapid progress can be made in clinical research. This paper will discuss accelerator and beam characteristics relevant to hadron therapy, particularly as applied to hospital-based facilities. A survey of currently-operating and planned hadron therapy facilities will be given, with particular emphasis on Lorna Linda (the first dedicated proton facility in a hospital) and HIMAC (the first dedicated heavy-ion medical facility).
Date: August 1, 1993
Creator: Alonso, J.R.
Partner: UNT Libraries Government Documents Department

Comparative Study of Vibration Stability at Operating Light Source Facilities and Lessons Learned in Achieving NSLS II Stability Goals

Description: In an effort to ensure that the stability goals of the NSLS II will be met once the accelerator structure is set on the selected BNL site a comprehensive evaluation of the ground vibration observed at existing light source facilities has been undertaken. The study has relied on measurement data collected and reported by the operating facilities as well as on new data collected in the course of this study. The primary goal of this comprehensive effort is to compare the green-field conditions that exist in the various sites both in terms of amplitude as well as frequency content and quantify the effect of the interaction of these accelerator facilities with the green-field vibration. The latter represents the ultimate goal of this effort where the anticipated motion of the NSLS II ring is estimated prior to its construction and compared with the required stability criteria.
Date: June 23, 2008
Creator: Simos,N.; Fallier, M. & Amick, H.
Partner: UNT Libraries Government Documents Department

Enhanced Method for Cavity Impedance Calculations

Description: With the proposal of medium to high average current accelerator facilities the demand for cavities with extremely low Higher Order Mode (HOM) impedances is increasing. Modern numerical tools are still under development to more thoroughly predict impedances that need to take into account complex absorbing boundaries and lossy materials. With the usually large problem size it is preferable to utilize massive parallel computing when applicable and available. Apart from such computational issues, we have developed methods using available computer resources to enhance the information that can be extracted from a cavities? wakefield computed in time domain. In particular this is helpful for a careful assessment of the extracted RF power and the mitigation of potential beam break-up or emittance diluting effects, a figure of merit for the cavity performance. The method is described as well as an example of its implementation.
Date: May 1, 2009
Creator: Marhauser, Frank; Rimmer, Robert; Tian, Kai & Wang, Haipeng
Partner: UNT Libraries Government Documents Department

XTOD - XES Interface Control Document

Description: This document describes the interface between the LCLS XTOD System (WBS No.1.5) and the LCLS XES (WBS No.1.6). The interface locations ranging from the beam dump to the far experimental hall are identified. Subsystems that connect at or cross the boundary are identified.
Date: September 7, 2005
Creator: Trent, J
Partner: UNT Libraries Government Documents Department

Electromagnetic Studies in Nuclei

Description: This talk is devoted to a brief review of the experimental program for the new generation of multi GeV continuous beam electron accelerator facilities. First, the kinematic variables used in electron scattering are reviewed, three experiments which are representative of previous work in this field are described, and some comparisons are made between electron and hadronic probes. The main part of the talk then describes seven experiemnts proposed for the future. These are concerned with the structure of light nuclei, the structure of mesons, and baryons, the influence of the nuclear medium on hadronic interaction, and the weak interactions.
Date: March 1, 1985
Creator: Gross, Franz
Partner: UNT Libraries Government Documents Department

35 Years of Electron Scattering

Description: A review of the current knowledge of nuclear and nucleon structure gained from electron beam physics is given. Also, the reasons for development of new accelerator facilities (in particular, CEBAF) are discussed.
Date: October 1, 1986
Creator: Walecka, J.
Partner: UNT Libraries Government Documents Department

Option study of an orthogonal X-ray radiography axis for pRad at LANSCE area C, Los Alamos.

Description: We report on an option study of two potential x-ray systems for orthogonal radiography at Area C in the LANSCE facility at Los Alamos National Laboratory. The systems assessed are expected to be near equivalent systems to the presently existing Cygnus capability at the Nevada Test Site. Nominal dose and radiographic resolution of 4 rad (measured at one meter) and 1 mm spot are desired. Both a system study and qualitative design are presented as well as estimated cost and schedule. Each x-ray system analyzed is designed to drive a rod-pinch electron beam diode capable of producing the nominal dose and spot.
Date: October 1, 2010
Creator: Oliver, Bryan Velten; Johnson, David L.; Leckbee, Joshua J. & Jones, Peter (Ktech Corp., Albuquerque, NM)
Partner: UNT Libraries Government Documents Department

High power fast ramping power supplies

Description: Hundred megawatt level fast ramping power converters to drive proton and heavy ion machines are under research and development at accelerator facilities in the world. This is a leading edge technology. There are several topologies to achieve this power level. Their advantages and related issues will be discussed.
Date: May 4, 2009
Creator: Marneris,I.; Bajon, E.; Bonati, R.; Sandberg, J.; Roser, T. & Tsoupas, N.
Partner: UNT Libraries Government Documents Department


Description: It is useful before beginning our work here to restate briefly the purpose of this workshop in the light of the present circumstances of elementary particle physics in the U.S. The goal of our field is easily stated in a general way: it is to reach higher center of mass energies and higher luminosities while employing more sensitive and more versatile event detectors, all in order to probe more deeply into the physics of elementary particles. The obstacles to achieving this goal are equally apparent. Escalating costs of construction and operation of our facilities limit alternatives and force us to make hard choices among those alternatives. The necessity to be highly selective in the choice of facilities, in conjunction with the need for increased manpower concentrations to build accelerators and mount experiments, leads to complex social problems within the science. As the frontier is removed ever further, serious technical difficulties and limitations arise. Finally, competition, much of which is usually healthy, now manifests itself with greater intensity on a regional basis within our country and also on an international scale. In the far ({ge}20 yr) future, collaboration on physics facilities by two or more of the major economic entities of the world will possibly be forthcoming. In the near future, we are left to bypass or overcome these obstacles on a regional scale as best we can. The choices we face are in part indicated in the list of planned and contemplated accelerators shown in Table I. The facilities indicated with an asterisk pose immediate questions: (1) Do we need them all and what should be their precise properties? (2) How are the ones we choose to be realized? (3) What is the nature of the detectors to exploit those facilities? (4) How do we respond to the challenge of ...
Date: April 1, 1983
Creator: Loken Ed, S.C. & Nemethy Ed, P.
Partner: UNT Libraries Government Documents Department

High efficiency muon beam

Description: Aspects of muon beams pertinent to the establishment of an effective nucleon structure facility are discussed and a preliminary design for such a beam at NAL is advanced. The optical properties, duty factor and proton beam source are already able to be sharply specified, but the pion and muon transports need more work to be optimal. It is already clear, however, that efficiency gains of at least 20 can be made and probably- factors of 50 or even 100 are not impossible. Beam/halo ratios can probably be raised to 14: 1 with proper spoilers. Most important of all, the effective beam time can be raised an order of magnitude over present prospects by establishing a separate source of protons for a muon beam by means of a split or pulsed switch in the present neutrino beam time. (auth)
Date: September 1, 1973
Creator: Kirk, T.
Partner: UNT Libraries Government Documents Department