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fix: change EcalEndcapN gmaterial from 'Vacuum' to 'Air'#1126

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EcalEndcapN-gmaterail-air
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fix: change EcalEndcapN gmaterial from 'Vacuum' to 'Air'#1126
wdconinc wants to merge 1 commit into
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EcalEndcapN-gmaterail-air

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@wdconinc

@wdconinc wdconinc commented Jun 6, 2026

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Briefly, what does this PR introduce? Please link to any relevant presentations or discussions.

This PR changes an errant Vacuum into Air where it appears more appropriate.

What is the urgency of this PR?

  • High (please describe reason below)
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What kind of change does this PR introduce?

  • Bug fix (issue: no vacuum outside of actual vacuum of beampipe)
  • New feature (issue #__)
  • Optimization (issue #__)
  • Updated constants (issue #__)
  • Updated documentation
  • other: __

Please check if any of the following apply

  • This PR introduces breaking changes. Please describe changes users need to make below.
  • This PR changes default behavior. Please describe changes below.
  • AI was used in preparing this PR. Please describe usage below.

Copilot AI review requested due to automatic review settings June 6, 2026 17:25
@github-actions github-actions Bot added topic: backward Negative-rapidity detectors (electron-going side) topic: calorimetry labels Jun 6, 2026
@wdconinc

wdconinc commented Jun 6, 2026

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Slice0_slice0_Vacuum_Vacuum_X__0p000_cm

@wdconinc wdconinc requested a review from veprbl June 6, 2026 17:25

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Pull request overview

This PR adjusts the DD4hep compact geometry for the backward endcap ECAL (EcalEndcapN) by changing the module gap material from Vacuum to Air, aligning the material choice with the stated intent (no vacuum outside the beampipe region).

Changes:

  • Update EcalEndcapN module gmaterial from Vacuum to Air in the backward PbWO4 endcap definition.

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