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LHC Instability Trigger Distribution LIST
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Last edited by OHWR Gitlab support Mar 15, 2019
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LHC Instability Trigger Distribution project (LIST)

Introduction

LIST is a general purpose trigger distribution system based on White Rabbit.* The latency between reception and transmission of a trigger is done with a low and notably fixed latency, with an accuracy of better than 1 ns. The distribution system can receive a trigger from a “cloud” of devices and distribute it to all relevant devices to for example freeze their acquisition buffers.
The hardware of the LIST nodes is based on the SVEC FMC carrier equipped with a FMC TDC mezzanine and a Fine Delay mezzanine.
The gateware of it is based on a 2-core Mock Turtle.

The first application of the LIST project is to provide a network for transporting trigger pulses between equipment involved in the LHC beam instability diagnostics.


Documentation

  • Functional Specification
  • Trigger and RF distribution using White Rabbit
    T. Włostowski et al., Proceedings of ICALEPCS2015, Melbourne, Australia, ISBN 978-3-95450-148-9, October 2015
  • LHC Instabilities Trigger Distribution (a.k.a. the LIST), Technical introduction & project status, 11 March 2014
  • Instability diagnostics, T. Levens et al.

Design


Top-level system block diagram (hardware + software)* click to enlarge


Contacts

  • Tom Wlostowski - CERN - Designer

Project status

Date Event
15-03-2013 Functional Requirements on LHC Transverse Instability Diagnostics after LS1 meeting.
04-11-2013 LHC instability project scope/objectives first version written.
19-05-2014 Functional specification written.
02-03-2015 LIST project installed at LHC. Being debugged.
31-05-2018 Created ohwr project 'LIST'.

31 May 2018

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