Jet algorithm FPGA

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Jet algorithm / FPGA

• by
• Attila Hidvégi

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Content

• Jet algorithm
• Jet-FPGA
• Summary and Outlook

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Jet algorithm

• Questions from last time
• How to treat saturation? Answer If the 4x4
  cluster contains a saturated element then the
  saturation bit in the ROI vector is set.
• Should the local maximum finding take saturations
  into consideration? Answer No.
• Changes have been implemented.
• Started to update the JEM specification

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Jet algorithm

• Initial tests with FCAL handling was made at RAL.
  The design worked as expected.
• We now have an algorithm which we believe is
  correct, we just have to make some test with high
  statistics in the current FPGA. Some preparations
  have been made
• My version of the jet algorithm in C can be
  found at the following location
• http//www.sysf.physto.se/attila/ATLAS/JEM/JET_FP
  GA_JEM-1.0/Software/jetverify/src/jet.cpp

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Jet-FPGA

• To reduce the total latency, by using faster
  input and output methods, new test designs have
  been created.
• There is absolutely no problem from the synthesis
  point of view.
• However, we havent been able to test them yet.
  It needs to be tested with the CMM.
• More delay scans with the input must be done.
• FCAL mapping needs to be sorted out, with help of
  the cabling documentation. ?

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Summary and Outlook

• Update the JEM specification.
• Make jet tests with high statistics.
• Work on latency reduction.
• FCAL mapping needs to be sorted out.