NDLI: The performance of the online system of the PHENIX experiment in the RHIC run 5

Content Provider	IEEE Xplore Digital Library
Author	Purschke, M.L.
Copyright Year	2005
Description	Author affiliation: Brookhaven Nat. Lab., Upton, NY (Purschke, M.L.)
Abstract	PHENIX is one of two large experiments at Brookhaven National Laboratory's Relativistic Heavy Ion Collider (RHIC). Previously, the PHENIX experiment had completed a very successful run 4 in early 2004, where we had been able to quadruple the data rate that had been achieved before. Run 5 consisted of a heavy-ion part, where copper beams were accelerated, followed by a polarized proton-proton part. We were able to further expand the data rates to a maximum of about 600 MB/s. By fully commissioning the so-called multi-event buffering in the data acquisition front-end, we were able to decrease the deadtime of the data acquisition while at the same increasing the event rate that we could sustain. In addition, the handling of the data was more efficient, which led to a faster turnaround between data taking and the subsequent calibration and reconstruction steps. During the proton-proton part of run 5, we were able to overcome a serious problem with the available local computing resources at Brookhaven National Laboratory. Using Grid tools, we sent 270 TB of raw data to the PHENIX "CCJ" computing center in Japan, through the network
Starting Page	221
Ending Page	222
File Size	305025
Page Count	2
File Format	PDF
ISBN	0780392213
ISSN	10957863
DOI	10.1109/NSSMIC.2005.1596240
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-23
Publisher Place	Puerto Rico
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Data acquisition Buffer storage Arm Laboratories Calibration Computer networks Robots Collaboration Copper Particle beams
Content Type	Text
Resource Type	Article

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