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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

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

[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

Deformation measurements at the vehicle tunnel overpass using a hydrostatic level system

Description: Long-term storage ring and experiment hall floor settlements are being monitored on a regular bases in six-month intervals utilizing common geometric leveling techniques. One area of concern requiring special attention in terms of settlements is the vehicle tunnel that undercuts the experiment hall an storage ring at the south side of the APS. Five user beamlines crossing over the vehicle tunnel could be affected by deformations in this area. Assuming the most severe temperature fluctuations would occur during the winter time, a monitoring system was installed at the beginning of 1996. The length of the experiment was dictated by the installation schedule of the user enclosures at the overpass.
Date: April 1, 1996
Creator: Friedsam, H.; Penicka, J. & Error, J.
Partner: UNT Libraries Government Documents Department

Developing accelerator operators at LANSCE

Description: The process of developing an individual into a competent operator who can safely and efficiently operate the Los Alamos Neutron Science Center (LANSCE), or other accelerator facility, is a complex process. It begins with recruiting and ends with retention; steps in between include training, professional development and career advancement. This paper discusses the approaches that the Operations and Technical Support Group at LANSCE has taken to deal with these and other issues associated with assembling a highly competent staff of accelerator operators. Emphasis is placed on operator training, which is accomplished through a self-study program modeled after the US Navy`s Nuclear Power Plant Operator qualification program.
Date: December 1, 1998
Creator: Hardy, M.W.
Partner: UNT Libraries Government Documents Department

Radiation risk management at DOE accelerator facilities

Description: The DOE accelerator contractors have been discussing among themselves and with the Department how to improve radiation safety risk management. This activity-how to assure prevention of unplanned high exposures-is separate from normal exposure management, which historically has been quite successful. The ad-hoc Committee on the Accelerator Safety Order and Guidance [CASOG], formed by the Accelerator Section of the HPS, has proposed a risk- based approach, which will be discussed. Concepts involved are risk quantification and comparison (including with non-radiation risk), passive and active (reacting) protection systems, and probabilistic analysis. Different models of risk management will be presented, and the changing regulatory environment will also be discussed..
Date: January 1, 1997
Creator: Dyck, O.B. van
Partner: UNT Libraries Government Documents Department

Accelerator complex for a radioactive ion beam facility at ATLAS

Description: Since the superconducting heavy ion linac ATLAS is an ideal post-accelerator for radioactive beams, plans are being developed for expansion of the facility with the addition of a driver accelerator, a production target/ion source combination, and a low q/m pre-accelerator for radioactive ions. A working group including staff from the ANL Physics Division and current ATLAS users are preparing a radioactive beam facility proposal. The present paper reviews the specifications of the accelerators required for the facility.
Date: June 1, 1995
Creator: Nolen, J.A.
Partner: UNT Libraries Government Documents Department

Future accelerators (?)

Description: I describe the future accelerator facilities that are currently foreseen for electroweak scale physics, neutrino physics, and nuclear structure. I will explore the physics justification for these machines, and suggest how the case for future accelerators can be made.
Date: August 21, 2003
Creator: Womersley, John
Partner: UNT Libraries Government Documents Department

The BTeV pixel and microstrip detector

Description: The BTeV pixel detector is one of the most crucial elements in the BTeV experiment. While the pixel detector is technically challenging, we have made great progress towards identifying viable solutions for individual components of the system. The forward silicon tracker is based on more mature technology and its design has benefited from the experience of other experiments. Nevertheless, we have started an R&amp;D program on the forward silicon tracker and first results are expected some time next year.
Date: June 4, 2003
Creator: Kwan, Simon W
Partner: UNT Libraries Government Documents Department

Recent advances in insertion devices

Description: Demand for more and better insertion devices (IDs) at new third-generation synchrotron radiation facilities has led to significant advances in ID technology at different laboratories around the world. In this overview of this progress, focus is on those results that apply to IDs in general rather than one specific ID or laboratory. The advances fall into two general categories: those that reduce the net effect that the ID has on the particle beam, and those that enhance the quality of the emitted light spectrum. The need for these advances, factors that are most important inaachieving them, and the current state of the art are discussed.
Date: December 31, 1995
Creator: Gluskin, E. & Moog, E.R.
Partner: UNT Libraries Government Documents Department

Advances in beam physics and technology: Colliders of the future

Description: Beams may be viewed as directed and focussed flow of energy and information, carried by particles and electromagnetic radiation fields (ie, photons). Often, they interact with each other (eg, in high energy colliders) or with other forms of matter (eg, in fixed targets, sychrotron radiation, neutron scattering, laser chemistry/physics, medical therapy, etc.). The whole art and science of beams revolve around the fundamental quest for, and ultimate implementation of, mechanisms of production, storage, control and observation of beams -- always directed towards studies of the basic structures and processes of the natural world and various practical applications. Tremendous progress has been made in all aspects of beam physics and technology in the last decades -- nonlinear dynamics, superconducting magnets and rf cavities, beam instrumentation and control, novel concepts and collider praradigms, to name a few. We illustrate this progress with a few examples and remark on the emergence of new collider scenarios where some of these progress might come to use -- the Gamma-Gamma Collider, the Muon Collider, laser acceleration, etc. We close with an outline of future oppotunities and outlook.
Date: November 1, 1994
Creator: Chattopadhyay, S.
Partner: UNT Libraries Government Documents Department

Isobar Separators for Radioactive Ion Beam Facilities

Description: A radioactive ion beam facility - in short a RIB facility - produces ions of short-lived nuclei and accelerates them to energies of 0.1�10 MeV per nucleon or even higher. In this process it is important that the resulting RIB beams are free from nuclei of neighboring isobars or of neighboring elements. This task requires the production and ionization of the nuclei of interest as well as separating them from all others with a high-mass resolving power and small-mass cross contaminations. When constructing such a facility it also is very important to find ways that allow the accelerated ions to be provided to different experiments at least quasi simultaneously.
Date: October 5, 1998
Creator: Garrett, J.D. & Wollnik, H.
Partner: UNT Libraries Government Documents Department