Eileen Berman

Pan-da And Beyond Data Acquisition For the Next Generation Experiments

We report on the status of the PAN-DA data acquisition system presented at the last Real Time Conference. Since that time, PAN-DA has been successfully used in the fixed target program at Fermilab. We also report on the plans and strategies for development of a new data acquisition system for the next generation of fixed target experiments at Fermilab. 10 refs., 3 figs.

The Low-Resolution Spectrograph of the Hobby-Eberly Telescope. II. Observations of quasar candidates from the Sloan Digital Sky Survey

ABSTRACT This paper describes spectra of quasar candidates acquired during the commissioning phase of the Low‐Resolution Spectrograph of the Hobby‐Eberly Telescope. The objects were identified as possible quasars from multicolor image data from the Sloan Digital Sky Survey. The 10 sources had typical r \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape

Remote Procedure Execution software for distributed systems

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The PAN-DA data acquisition system

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The Vaxonline Software System at Fermilab

The Remote Procedure Execution (RPX) software, which facilitates the construction of distributed software systems spanning computers of various types, is discussed. Programmers who use the RPX package specify subroutine calls that are to be executed on a remote computer. RPX is used to generate code for dummy routines that transmit input parameters and receive output parameters as well as for a main program that receives procedure call requests, calls the requested procedure, and returns the result. The package automatically performs data-type conversions and uses an appropriate connection-oriented protocol. >

Data acquisition systems for the Sloan Digital Sky Survey

The VAXONLINE data acquisition package has been extended to include a VME-based data path. The resulting environment, PAN-DA, provides a high throughput for logging, filtering, formatting, and selecting events. The authors describe the history and rationale of the system, the VME hardware modules, PAN-DA systems coordination, and system connectivity. >

The Fermilab data storage infrastructure

The VAXONLINE software system, started in late 1984, is now in use at 12 experiments at Fermilab, with at least one VAX or MicroVax. Data acquisition features now provide for the collection and combination of data from one or more sources, via a list-driven Event Builder program. Supported sources include CAMAC, FASTBUS, Front-end PDP-11s, Disk, Tape, DECnet and other processors running VAXONLINE. This paper describes the functionality provided by the VAXONLINE system, gives performance figures and discusses the ongoing program of enhancements.

Fermilab's multi-petabyte scalable mass storage system

The Sloan Digital Sky Survey will image (Pi) steradians about the north galactic cap in five filters, and acquire one million spectra using a dedicated 2.5 m telescope at the Apache Point Observatory in New Mexico. We describe the data acquisition system for the surveys three main detectors: an imaging camera, mounting 54 Tektronix charge-coupled devices (CCD); a pair of spectrographs, each mounting a pair of CCDs; and a smaller monitor telescope camera. We describe the systems hardware and software architecture, and relate it to the surveys special requirements for high reliability and need to understand its instrumentation in order to produce a consistent survey over a five year period.

Software for the Fermilab FASTBUS Smart Crate Controller

Fermilab, in collaboration with the DESY laboratory in Hamburg, Germany, has created a petabyte scale data storage infrastructure to meet the requirements of experiments to store and access large data sets. The Fermilab data storage infrastructure consists of the following major storage and data transfer components: the Enstore mass storage system, DCache distributed data cache, FTP and grid FTP for primarily external data transfers. This infrastructure provides a data throughput sufficient for transferring data from experimental data acquisition systems. It also allows access to data in the grid framework.

The Sloan Digital Sky Survey's use of the Web

Fermilab provides a multi-petabyte scale mass storage system for high energy physics (HEP) experiments and other scientific endeavors. We describe the scalability aspects of the hardware and software architecture that were designed into the mass storage system to permit us to scale to multiple petabytes of storage capacity, manage tens of terabytes per day in data transfers, support hundreds of users, and maintain data integrity. We discuss in detail how we scale the system over time to meet the ever-increasing needs of the scientific community, and relate our experiences with many of the technical and economic issues related to scaling the system. Since the 2003 MSST conference, the experiments at Fermilab have generated more than 1.9 PB of additional data. We present results on how this system has scaled and performed for the Fermilab CDF and D0 Run II experiments as well as other HEP experiments and scientific endeavors.