22 Matching Results

Search Results

Advanced search parameters have been applied.
in creator/contributor: "D'Ottavio, T."  
Results: 1 - 22
open access

Programs for control of an analog-signal switching network

Description: A suite of programs has been developed to control the network of analog-signal switching multiplexers in the AGS complex. The software is driven by a relational database which describes the architecture of the multiplexer tree and the set of available analog signals. Signals are routed through a three-layer multiplexer tree, to be made available at four consoles each with three 4-trace oscilloscopes. A menu-structured operator interface program is available at each console, to accept requests t… more
Date: January 1, 1989
Creator: D'Ottavio, T.; Enriquez, R.; Katz, R. & Skelly, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

User control of the proton beam injection trajectories into the AGS Booster

Description: The 1.5 GeV (proton) Booster Synchrotron nearing completion at the AGS will get its 200 MeV beam from the linac, via a 34.9 m long linac-to-Booster transport line, LTB. LTB branches off from the existing linac-to-AGS transport line, HEBT, approximately 18.4 m downstream from the linac. A schematic layout of LTB is shown in the bottom part of Fig. 1. The four dipoles, DH2 through DH5, which are identical and are operated in series, provide a 126{degrees} bend in the line. We have employed three … more
Date: January 1, 1991
Creator: D'Ottavio, T.; Kponou, A.; Luccio, A.; Alessi, J.G.; Reece, R.K. & Skelly, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Automating power supply checkout

Description: Power Supply checkout is a necessary, pre-beam, time-critical function. At odds are the desire to decrease the amount of time to perform the checkout while at the same time maximizing the number and types of checks that can be performed and analyzing the results quickly (in case any problems exist that must be addressed). Controls and Power Supply Group personnel have worked together to develop tools to accomplish these goals. Power Supply checkouts are now accomplished in a time-frame of hours… more
Date: March 28, 2011
Creator: Laster, J.; Bruno, D.; D'Ottavio, T.; Drozd, J.; Marr, G. & Mi, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

RHIC Polarized proton operation

Description: The Relativistic Heavy Ion Collider (RHIC) operation as the polarized proton collider presents unique challenges since both luminosity(L) and spin polarization(P) are important. With longitudinally polarized beams at the experiments, the figure of merit is LP{sup 4}. A lot of upgrades and modifications have been made since last polarized proton operation. A 9 MHz rf system is installed to improve longitudinal match at injection and to increase luminosity. The beam dump was upgraded to increase … more
Date: March 28, 2011
Creator: Huang, H.; Ahrens, L.; Alekseev, I. G.; Aschenauer, E.; Atoian, G.; Bai, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improved alarm tracking for better accountability

Description: An alarm system is a vital component of any accelerator, as it provides a warning that some element of the system is not functioning properly. The severity and age of the alarm may sometimes signify whether urgent or deferred attention is required. For example, older alarms may be given a lower priority if an assumption is made that someone else is already investigating it, whereas those of higher severity or alarms that are more current may indicate the need for an immediate response. The alar… more
Date: March 28, 2011
Creator: Nemesure, S.; Marr, G.; Shrey, T.; Kling, N.; Hammons, L.; Ingrassia, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

RHIC Polarized proton performance in run-8

Description: During Run-8, the Relativistic Heavy Ion Collider (RHIC) provided collisions of spin-polarized proton beams at two interaction regions. Physics data were taken with vertical orientation of the beam polarization, which in the 'Yellow' RHIC ring was significantly lower than in previous years. We present recent developments and improvements as well as the luminosity and polarization performance achieved during Run-8, and we discuss possible causes of the not as high as previously achieved polariza… more
Date: October 6, 2008
Creator: Montag, C.; Bai, M.; MacKay, W. W.; Roser, T.; Abreu, N.; Ahrens, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Results from Vernier scans during the RHIC 2008 PP Run

Description: Using the vernier scan or Van der Meer scan technique, where one beam is swept stepwise across the other while measuring the collision rate as a function of beam displacement, the transverse beam profiles, the luminosity and the effective cross section of the detector in question can be measured. This report briefly recalls the vernier scan method and presents results from the 100 GeV 2008 RHIC polarized proton (pp) run.
Date: May 4, 2009
Creator: Drees, A. & D'Ottavio, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Quick setup of unit test for accelerator controls system

Description: Testing a single hardware unit of an accelerator control system often requires the setup of a program with graphical user interface. Developing a dedicated application for a specific hardware unit test could be time consuming and the application may become obsolete after the unit tests. This paper documents a methodology for quick design and setup of an interface focused on performing unit tests of accelerator equipment with minimum programming work. The method has three components. The first i… more
Date: March 28, 2011
Creator: Fu, W.; D'Ottavio, T.; Gassner, D.; Nemesure, S. & Morris, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Medium energy heavy ion operations at RHIC

Description: As part of the search for a phase transition or critical point on the QCD phase diagram, an energy scan including 5 different energy settings was performed during the 2010 RHIC heavy ion run. While the top beam energy for heavy ions is at 100 GeV/n and the lowest achieved energy setpoint was significantly below RHICs injection energy of approximately 10 GeV/n, we also provided beams for data taking in a medium energy range above injection energy and below top beam energy. This paper reviews RHI… more
Date: March 28, 2011
Creator: Drees, K. A.; Ahrens, L.; Bai, M.; Beebe-Wang, J.; Blackler, I. M. C.; Blaskiewicz, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Cybersecurity and User Accountability in the C-Ad Control System

Description: A heightened awareness of cybersecurity has led to a review of the procedures that ensure user accountability for actions performed on the computers of the Collider-Accelerator Department (C-AD) Control System. Control system consoles are shared by multiple users in control rooms throughout the C-AD complex. A significant challenge has been the establishment of procedures that securely control and monitor access to these shared consoles without impeding accelerator operations. This paper provid… more
Date: October 15, 2007
Creator: Morris, J. T.; Binello, S.; D'Ottavio, T. & Katz, R. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tracking Accelerator Settings.

Description: Recording setting changes within an accelerator facility provides information that can be used to answer questions about when, why, and how changes were made to some accelerator system. This can be very useful during normal operations, but can also aid with security concerns and in detecting unusual software behavior. The Set History System (SHS) is a new client-server system developed at the Collider-Accelerator Department of Brookhaven National Laboratory to provide these capabilities. The SH… more
Date: October 15, 2007
Creator: D'Ottavio, T.; Fu, W. & Ottavio, D. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Using Sequencing to Improve Operational Efficiency and Reliability

Description: Operation of an accelerator requires the efficient and reproducible execution of many different types of procedures. Some procedures, like beam acceleration, magnet quench recovery, and species switching can be quite complex. To improve accelerator reliability and efficiency, automated execution of procedures is required. Creation of a single robust sequencing application permits the streamlining of this process and offers many benefits in sequence creation, editing, and control. In this paper,… more
Date: October 15, 2007
Creator: D'Ottavio, T. & Niedziela, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

RHIC Performance During the FY10 200 GeV Au+Au Heavy Ion Run

Description: Since the last successful RHIC Au+Au run in 2007 (Run-7), the RHIC experiments have made numerous detector improvements and upgrades. In order to benefit from the enhanced detector capabilities and to increase the yield of rare events in the acquired heavy ion data a significant increase in luminosity is essential. In Run-7 RHIC achieved an average store luminosity of <L> = 12 x 10{sup 26} cm{sup -2} s{sup -1} by operating with 103 bunches (out of 111 possible), and by squeezing to {beta}… more
Date: May 23, 2010
Creator: Brown, K. A.; Ahrens, L.; Bai, M.; Beebe-Wang, J.; Blaskiewicz, M.; Brennan, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

RHIC Data Correlation Methodology.

Description: A requirement for RHIC data plotting software and physics analysis is the correlation of data from all accelerator data gathering systems. Data correlation provides the capability for a user to request a plot of multiple data channels vs. time, and to make meaningful time-correlated data comparisons. The task of data correlation for RHIC requires careful consideration because data acquisition triggers are generated from various asynchronous sources including events from the RHIC Event Link, eve… more
Date: March 29, 1999
Creator: Michnoff, R.; D'Ottavio, T.; Hoff, L.; MacKay, W. & Satogata, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

RHIC Performance for FY2011 Au+Au Heavy Ion Run

Description: Following the Fiscal Year (FY) 2010 (Run-10) Relativistic Heavy Ion Collider (RHIC) Au+Au run, RHIC experiment upgrades sought to improve detector capabilities. In turn, accelerator improvements were made to improve the luminosity available to the experiments for this run (Run-11). These improvements included: a redesign of the stochastic cooling systems for improved reliability; a relocation of 'common' RF cavities to alleviate intensity limits due to beam loading; and an improved usage of fee… more
Date: September 4, 2011
Creator: Marr, G.; Ahrens, L.; Bai, M.; Beebe-Wang, J.; Blackler, I.; Blaskiewicz, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design of the commissioning software for the AGS to RHIC transfer line

Description: RHIC accelerator physicists and engineers have collaboratively specified the control system software for the commissioning of the AGS to RHIC transfer line (ATR) to occur in the fall of 1995. This paper summarizes the design and progress to date. The authors discuss the basic physics/engineering device model that they use to understand process and data flows, and describe the architecture and tools they will use to build the application level software.
Date: May 1, 1995
Creator: Trahern, C. G.; Saltmarsh, C.; Satogata, T.; Kewisch, J.; Sathe, S.; D'Ottavio, T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ATR Commissioning Software Task Force Report

Description: The Beam Injection Test Software Task Force was Charged with Studying software needed for the ATR Test, seen as a stepping stone or template for the larger scope for the full RHIC control system. This report outlines our avenues of exploration so far, present the current analysis and implementation work in progress, and gives recommendation for the future on the ATR and longer time scales.
Date: December 16, 1994
Creator: The 2x4 Gang
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The RHIC and RHIC Pre-Injectors Controls Systems: Status and Plans

Description: For the past twelve years experiments at the Relativistic Heavy Ion Collider (RHIC) have recorded data from collisions of heavy ions and polarized protons, leading to important discoveries in nuclear physics and the spin dynamics of quarks and gluons. BNL is the site of one of the first and still operating alternating gradient synchrotrons, the AGS, which first operated in 1960. The accelerator controls systems for these instruments span multiple generations of technologies. In this report we w… more
Date: October 10, 2011
Creator: Brown, K. A.; Altinbas, Z.; Aronson, J.; Binello, S.; Campbell, I.; Costanzo, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
Back to Top of Screen