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Title: The Upgrade Path from Legacy VME to VXS Dual Star Connectivity for Large Scale Data Acquisition and Trigger Systems

Abstract

New instrumentation modules have been designed by Jefferson Lab and to take advantage of the higher performance and elegant backplane connectivity of the VITA 41 VXS standard. These new modules are required to meet the 200KHz trigger rates envisioned for the 12GeV experimental program. Upgrading legacy VME designs to the high speed gigabit serial extensions that VXS offers, comes with significant challenges, including electronic engineering design, plus firmware and software development issues. This paper will detail our system design approach including the critical system requirement stages, and explain the pipeline design techniques and selection criteria for the FPGA that require embedded Gigabit serial transceivers. The entire trigger system is synchronous and operates at 250MHz clock with synchronization signals, and the global trigger signals distributed to each front end readout crate via the second switch slot in the 21 slot, dual star VXS backplane. The readout of the buffered detector signals relies on 2eSST over the standard VME64x path at >200MB/s. We have achieved 20Gb/s transfer rate of trigger information within one VXS crate and will present results using production modules in a two crate test configuration with both VXS crates fully populated. The VXS trigger modules that reside in themore » front end crates, will be ready for production orders by the end of the 2011 fiscal year. VXS Global trigger modules are in the design stage now, and will be complete to meet the installation schedule for the 12GeV Physics program.« less

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1032841
Report Number(s):
JLAB-PHY-11-1458; DOE/OR/23177-1972
TRN: US201202%%447
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Conference: ICALEPCS 2011, 10-14 October 2011, Grenoble, France
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; COMPUTERS; CONFIGURATION; DATA ACQUISITION; DESIGN; PERFORMANCE; PHYSICS; PIPELINES; PRODUCTION; SCHEDULES; SYNCHRONIZATION; VELOCITY; PROGRAMMING

Citation Formats

Cuevas, C, Barbosa, F J, Dong, H, Gu, W, Jastrzembski, E, Kaneta, S R, Moffitt, B, Nganga, N, Raydo, B J, Somov, A, Taylor, W M, and Wilson, J. The Upgrade Path from Legacy VME to VXS Dual Star Connectivity for Large Scale Data Acquisition and Trigger Systems. United States: N. p., 2011. Web.
Cuevas, C, Barbosa, F J, Dong, H, Gu, W, Jastrzembski, E, Kaneta, S R, Moffitt, B, Nganga, N, Raydo, B J, Somov, A, Taylor, W M, & Wilson, J. The Upgrade Path from Legacy VME to VXS Dual Star Connectivity for Large Scale Data Acquisition and Trigger Systems. United States.
Cuevas, C, Barbosa, F J, Dong, H, Gu, W, Jastrzembski, E, Kaneta, S R, Moffitt, B, Nganga, N, Raydo, B J, Somov, A, Taylor, W M, and Wilson, J. Sat . "The Upgrade Path from Legacy VME to VXS Dual Star Connectivity for Large Scale Data Acquisition and Trigger Systems". United States. https://www.osti.gov/servlets/purl/1032841.
@article{osti_1032841,
title = {The Upgrade Path from Legacy VME to VXS Dual Star Connectivity for Large Scale Data Acquisition and Trigger Systems},
author = {Cuevas, C and Barbosa, F J and Dong, H and Gu, W and Jastrzembski, E and Kaneta, S R and Moffitt, B and Nganga, N and Raydo, B J and Somov, A and Taylor, W M and Wilson, J},
abstractNote = {New instrumentation modules have been designed by Jefferson Lab and to take advantage of the higher performance and elegant backplane connectivity of the VITA 41 VXS standard. These new modules are required to meet the 200KHz trigger rates envisioned for the 12GeV experimental program. Upgrading legacy VME designs to the high speed gigabit serial extensions that VXS offers, comes with significant challenges, including electronic engineering design, plus firmware and software development issues. This paper will detail our system design approach including the critical system requirement stages, and explain the pipeline design techniques and selection criteria for the FPGA that require embedded Gigabit serial transceivers. The entire trigger system is synchronous and operates at 250MHz clock with synchronization signals, and the global trigger signals distributed to each front end readout crate via the second switch slot in the 21 slot, dual star VXS backplane. The readout of the buffered detector signals relies on 2eSST over the standard VME64x path at >200MB/s. We have achieved 20Gb/s transfer rate of trigger information within one VXS crate and will present results using production modules in a two crate test configuration with both VXS crates fully populated. The VXS trigger modules that reside in the front end crates, will be ready for production orders by the end of the 2011 fiscal year. VXS Global trigger modules are in the design stage now, and will be complete to meet the installation schedule for the 12GeV Physics program.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {10}
}

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