Status of integration and debugging of the TPD

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Status of integration and debugging of the TPD

• Mauro Menichelli
• INFN Perugia

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The TPD used for the test beam at CERN I

• We received the TPD that was used in the Beam
  test at CERN
• The TPD was integrated using EM mechanics and no
  connectors.
• It includes a full set of QM2 converters (4 9051,
  2 9053 and 2 9055)
• It includes no S9011AT and a QM1 S9011B

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The TPD used for the test beam at CERN II
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Problems with present cabling

• It has 28-RTN connected to chassis
• Internal shields not connected
• It has a criticality on the position of the
  panduit for the 28V and the 28-RTN in the power
  bar.
• Proposed solutionremoval of the two internal
  power bar and cable re-arrangement.

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Panduit for 28V and 28V-RTN
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Situation at CERN (sigma raw)
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Situation at CERN (sigma)
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Perugia all linear PS
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Added S9053
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Added S9051 SK
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Added S9051 S only
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All DC/DC except S9051 K
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All DC/DC converters
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Efforts to solve the problem

• From previous experience we started with twisting
  and shielding the cable of the S9051K
• This did not solved the problem, however the
  situation is not 100 the same with the previous
  prototype we need to separate 28-RTN from chassis
• Breaking news After the separation of 28-RTN
  from chassis the noise disappeared.
• After this problem fully understood we will begin
  TPD QM2 integration
• TPD-GSE ready need to test the communication with
  QM2 S9011AT.

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After separation of 28V-RTN from chassis