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Integrating externally developed systems for SNS Linac cooling and vacuum.

Description: External contractors are developing the local cooling and vacuum control systems for the Spallation Neutron Source (SNS) linac. Soon these systems will be integrated into the facility-wide controls system. Allen-Bradley Logix5000 series programmable controllers, populated with appropriate input/output modules, were selected as the local controllers. These controllers will be interfaced to the facility-wide control system via VME systems with PowerPC processors running the Wind River VxWorks ope… more
Date: January 1, 2001
Creator: Marroquin, P. S. (Pilar S.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Next generation epics interface to abstract data.

Description: The set of externally visible properties associated with process variables in the Experimental Physics and Industrial Control System (EPICS) is predefined in the EPICS base distribution and is therefore not extensible by plug-compatible applications. We believe that this approach, while practical for early versions of the system with a smaller user base, is now severely limiting expansion of the high-level application tool set for EPICS. To eliminate existing barriers, we propose a new C++ base… more
Date: January 1, 2001
Creator: Hill, J. O. (Jeffrey O.) & Lange, R. (Ralph)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Portable 3-D computed tomography system

Description: Through a Cooperative Research and Development Agreement between Los Alamos National Laboratory and HYTEC, Inc., a portable 3-D Computed Tomography (CT) system has been developed that dramatically reduces the overall complexity and time-to-completion for performing CT studies. The system incorporates an amorphous silicon flat-panel detector, coupled motion control and state of the art software to produce high quality CT results. All alignment, image calibration and radiation exposure monitoring… more
Date: June 1, 2001
Creator: Phillips, D. H. (David H.); Davis, A. W. (Anthony W.); Keating, S. C. (Scott C.) & Claytor, T. N. (Thomas N.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Sensor guided control and navigation with intelligent machines. Final technical report

Description: This item constitutes the final report on ''Visionics: An integrated approach to analysis and design of intelligent machines.'' The report discusses dynamical systems approach to problems in robust control of possibly time-varying linear systems, problems in vision and visually guided control, and, finally, applications of these control techniques to intelligent navigation with a mobile platform. Robust design of a controller for a time-varying system essentially deals with the problem of synth… more
Date: March 26, 2001
Creator: Ghosh, Bijoy K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Overview of the NSTX Control System

Description: The National Spherical Torus Experiment (NSTX) is an innovative magnetic fusion device that was constructed by the Princeton Plasma Physics Laboratory (PPPL) in collaboration with the Oak Ridge National Laboratory, Columbia University, and the University of Washington at Seattle. Since achieving first plasma in 1999, the device has been used for fusion research through an international collaboration of more than twenty institutions. The NSTX is operated through a collection of control systems t… more
Date: December 3, 2001
Creator: Sichta, P.; Dong, J.; Oliaro, G. & Roney, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Automated real-time testing (ARTT) for embedded control systems (ECS).

Description: Developing real-time automated test systems for embedded control systems has been a real problem. Some engineers and scientists have used customized software and hardware as a solution, which can be very expensive and time consuming to develop. We have discovered how to integrate a suite of commercially available off-the-shelf software tools and hardware to develop a scalable test platform that is capable of performing complete black-box testing for a dual-channel real-time Embedded-PLC-based c… more
Date: October 29, 2001
Creator: Hawkins, J.; Nguyen, H. & Howard, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Reimplementing the EPICS static database access library.

Description: The Static Database Access library was first introduced in EPICS (Experimental Physics and Industrial Control System) Release 3.11 in 1994. It provides an application program interface (API) for database configuration tools written in C to manipulate database record definitions and is used for various tasks within the core EPICS software. This paper describes the structure of a replacement for the original library that adds a native C++ API and will make some future enhancements to EPICS signif… more
Date: November 13, 2001
Creator: Johnson, A. N. & Kraimer, M. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Decision support facility for the APS control system.

Description: The Advanced Photon Source is now in its fifth year of routine beam production. The EPICS-based [1] control system has entered the phase in its life cycle where new control algorithms must be implemented under increasingly stringent operational and reliability requirements. The sheer volume of the control system ({approx}270,000 records, {approx}145 VME-based input-output controllers (IOCs), and {approx}7,000,000 lines of EPICS ASCII configuration code), presents a daunting challenge for code m… more
Date: November 12, 2001
Creator: Dohan, D. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Computational Modeling in Support of National Ignition Facility Operations

Description: Numerical simulation of the National Ignition Facility (NIF) laser performance and automated control of laser setup process are crucial to the project's success. These functions will be performed by two closely coupled computer codes: the virtual beamline (VBL) and the laser operations performance model (LPOM).
Date: October 23, 2001
Creator: Shaw, M J; Sacks, R A; Haynam, C A & Williams, W H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Versatile Data Acquisition and Controls for EPICS using VME-based FPGAs

Description: Field Programmable Gate Arrays (FPGAs) have provided versatile VME based data acquisition and control systems with minimal development times for the Thomas Jefferson National Accelerator Facility (Jefferson Lab). FPGAs have been used to interface with VME controllers using both standard A16 and A24 address modes. VME vector-interrupt capability has also been implemented for timing issues in some applications. FPGA designs have additionally been used to provide controls for various systems by in… more
Date: November 1, 2001
Creator: Allison, Trent & Flood, Roger
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The SNS Cryogenic Control System: Experiences in Collaboration

Description: The cryogenic system for the Spallation Neutron Source (SNS) is designed by Jefferson Laboratory (JLab) personnel and is based on the existing JLab facility. Our task is to use the JLab control system design [2] as much as practical while remaining consistent with SNS control system standards. Some aspects of the systems are very similar, including equipment to be controlled, the need for PID loops and automatic sequences,and the use of EPICS. There are differences in device naming, system hard… more
Date: November 2001
Creator: Strong, W. H.; Gurd, P. A.; Creel, J. D. & Bevins, B. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The RHIC Sequencer

Description: The Relativistic Heavy Ion Collider (RHIC) has a high level asynchronous time-line driven by a controlling program called the ''Sequencer''. Most high-level magnet and beam related issues are orchestrated by this system. The system also plays an important task in coordinated data acquisition and saving. We present the program, operator interface, operational impact and experience.
Date: June 18, 2001
Creator: Van Zeijts, J.; Dottavio, T.; Frak, B. & Michnoff, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Accelerator Operators and Software Development

Description: At Thomas Jefferson National Accelerator Facility, accelerator operators perform tasks in their areas of specialization in addition to their machine operations duties. One crucial area in which operators contribute is software development. Operators with programming skills are uniquely qualified to develop certain controls applications because of their expertise in the day-to-day operation of the accelerator. Jefferson Lab is one of the few laboratories that utilizes the skills and knowledge of… more
Date: November 1, 2001
Creator: Miller, April & Joyce, Michele
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fast Digital Orbit Feedback Systems at NSLS

Description: We are implementing digital orbit feedback systems to replace the analog ones in both the VUV and the X-ray rings. We developed an original VME-based design which is run by a powerful Motorola 2305 CPU and consists entirely of off-the-shelf VME boards. This makes the system inexpensive and easy to configure, and allows for high digitizing rates. The new 5 kHz digital global feedback system is currently operational in the VUV ring, and the X-ray system is in the commissioning phase. Some of the … more
Date: June 18, 2001
Creator: Podobedov, B.; Kushner, B.; Ramamoorthy, S.; Tang, Y. & Zitvogel, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Towards the Standardization of a MATLAB-Based Control Systems Laboratory Experience for Undergraduate Students

Description: This paper seeks to begin a discussion with regard to developing standardized Computer Aided Control System Design (CACSD) tools that are typically utilized in an undergraduate controls laboratory. The advocated CACSD design tools are based on the popular, commercially available MATLAB environment, the Simulink toolbox, and the Real-Time Workshop toolbox. The primary advantages of the proposed approach are as follows: (1) the required computer hardware is low cost, (2) commercially available pl… more
Date: March 15, 2001
Creator: Dixon, W.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Control System Design Philosophy for Effective Operations and Maintenance

Description: A well-designed control system facilitates the functions of machine operation, maintenance and development. In addition, the overall effectiveness of the control system can be greatly enhanced by providing reliable mechanisms for coordination and communication, ensuring that these functions work in concert. For good operability, the information presented to operators should be consistent and easy to understand. The user interfaces should be simple to customize. A maintainable system allows a br… more
Date: November 1, 2001
Creator: White, Karen S. & Bickley, Matthew
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Architecture of a software quench management system

Description: Testing superconducting accelerator magnets is inherently coupled with the proper handling of quenches; i.e., protecting the magnet and characterizing the quench process. Therefore, software implementations must include elements of both data acquisition and real-time controls. The architecture of the quench management software developed at Fermilab's Magnet Test Facility is described. This system consists of quench detection, quench protection, and quench characterization components that execut… more
Date: July 30, 2001
Creator: al., Jerzy M. Nogiec et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Relational Database Model for Managing Accelerator Control System Software at Jefferson Lab

Description: The operations software group at the Thomas Jefferson National Accelerator Facility faces a number of challenges common to facilities which manage a large body of software developed in-house. Developers include members of the software group, operators, hardware engineers and accelerator physicists.One management problem has been ensuring that all software has an identified owner who is still working at the lab. In some cases, locating source code for ''orphaned'' software has also proven to be … more
Date: November 1, 2001
Creator: Schaffner, Sally & Larrieu, Theodore
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

UNCERTAIN SYSTEM MODELING OF SNS RF CONTROL SYSTEM

Description: This paper addresses the modeling problem of the linear accelerator RF system for SNS. The cascade of the klystron and the cavity is modeled as a nominal system. In the real world, high voltage power supply ripple, Lorentz Force Detuning, microphonics, cavity RF parameter perturbations, distortions in RF components, and loop time delay imperfection exist inevitably, which must be analyzed. The analysis is based on the accurate modeling of the disturbances and uncertainties. In this paper, a mod… more
Date: June 1, 2001
Creator: KWON, S.; REGAN, A. & AL, ET
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Dual Digital Signal Processor VME Board for Instrumentation and Control Applications

Description: A Dual Digital Signal Processing VME Board is being developed for the CEBAF Beam Current Monitor system at Jefferson Lab. It is a versatile general-purpose digital signal processing board using an open architecture, which allows for adaptation to various applications. The base design uses two independent Texas Instrument (TI) TMS320C6711, which are 900 MFLOPS floating-point digital signal processors (DSP). Applications that require a fixed point DSP can be implemented by replacing the baseline … more
Date: November 1, 2001
Creator: Dong, H.; Flood, R.; Hovater, C. & Musson, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Information-Control Software for Handling Serial Devices in an EPICS Environment

Description: Each accelerator control system has a variety of measurement devices. One of the most common types of instrument interfaces used for their control is a serial (RS-232) bus. It is inexpensive and adequate for relatively simple measurement and control devices such as switchers, amplifiers, voltmeters, and stepper motors. Since the RS-232 specification is very broad and does not require uniformity above the basic communication protocol level, one of the major problems associated with the use of RS… more
Date: November 1, 2001
Creator: Chevtsov, P. & Schaffner, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Timing Synchronization System At Jefferson Lab

Description: This paper will present the requirements and design of the Timing Synchronization System for the Continuous Electron Beam Accelerator Facility control system at Thomas Jefferson National Accelerator Facility. A clock module has been designed to reside in a VME crate with a master front-end computer and communicate with the Data Acquisition VME crates and their front-end computers via a serial fiber optic line. Configuration of the clock modules is jumper and software selectable. The application… more
Date: November 1, 2001
Creator: Keesee, Marie; Dickson, Richard; Flood, Roger & Lebedev, Valeri
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Power Supply Control and Monitoring for the SNS Ring and Transport System

Description: There are approximately 300 magnet power supplies in the SNS accumulator ring and transport lines. Control and monitoring of the these converters will be primarily accomplished with a new Power Supply Interface and Controller (PSI/PSC) system developed for the SNS project. This PSI/PSC system provides all analog and digital commands and status readbacks in one fiber isolated module. With a maximum rate of 10KHz, the PSI/PSC must be supplemented with higher speed systems for the wide bandwidth p… more
Date: June 28, 2001
Creator: Lambiase, R.; Oerter, B.; Peng, S. & Smith, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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