Difference between revisions of "November 18, 2021 CPP Design Meeting"

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* Testing status - Beni/Elton
 
* Testing status - Beni/Elton
 
* LV boxes https://logbooks.jlab.org/entry/3939570
 
* LV boxes https://logbooks.jlab.org/entry/3939570
 +
* Moving of Vertical cable trays and cables inside
 
* Design/Fab/Procurement status
 
* Design/Fab/Procurement status
 
** Lead absorbers - awarded
 
** Lead absorbers - awarded
 
** All assembly hardware either here or due in by December
 
** All assembly hardware either here or due in by December
 
** Test install in the TEDF High bay - use of 2 or 3 chambers
 
** Test install in the TEDF High bay - use of 2 or 3 chambers
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  [[image:cpp_install_assy.jpg]]
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  [[image:cpp_install_assy.pdf]]
 
* Installation/assy 3D Model and dwgs
 
* Installation/assy 3D Model and dwgs
 
** DS Chamber orientation
 
** DS Chamber orientation
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** assembly components - drawings released
 
** assembly components - drawings released
 
** Installation drawings in review
 
** Installation drawings in review
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* Target Design in work [[image:cpp_target1.jpg|thumb]] [[image:cpp_target2.jpg|thumb]] [[image:cpp_target3.jpg|thumb]] [[image:cpp_target4.jpg|thumb]]
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* Target Design in work [[image:cpp_target5.jpg|thumb]] [[image:cpp_target6.jpg|thumb]] [[image:cpp_target7.jpg|thumb]] [[image:cpp_target8.jpg|thumb]]
  
  
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== Minutes ==
 
== Minutes ==
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* Elton will meet with Chris Stanislav Monday to discuss D connector
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* Elton met with nick and discussed LV box. Need to make bracket smaller (1/16" thick) boxes should be on top-north corner of each chamber
−
* Elton requested the removal of the scintillator paddles from the collimator cave so they can be tested
+
* For fiducializing chambers, all four edges or bolt holes can be used to find center. Machining is very accurate
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* All 8 chambers have been tested, 6 are good, Rory will come to the lab around Dec 13 to check the 2 noisy chambers
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* Proposed chamber orientation good - horizontal x-ray port DS, Vertical x-ray port US
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* Most of the chamber data has been taken and the HV and gas turned off
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* Rory/Elton requested 4 scintillator paddles, 2 BL and 2 BR in vertical position equally spaced (15" oc). To be held by light guides, maybe a V block
−
* The large lead absorber has been awarded and due in December. Lead from JLAB to be delivered to vendor Friday
+
* Lead Target needs to be pressed flat since it is malleable and has the center protruding
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* Adjustable lead absorber due before Thanksgiving.
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* A test install of one of the 15,000 lb steel absorbers was accomplished on the stand in the TEDF high bay. Test went well with some lessons learned. Since the setup looks top heavy, we plan to stabilize the first section to the Darkroom when installed
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* Discussed Elton's plan for orientation of the chambers. Vertical chambers have x-ray port US and Horizontal chambers have xray port DS. Alternate vert/Horiz. DS most is now horizontal https://logbooks.jlab.org/entry/3939570
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* We need to take a closer look at cable tray and vertical cable manager interference
+
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* Take a closer look to ensure cables clear tray
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* Discussed target geometry and design. OK to use 3 cm bore for target window.
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−
 
+
 
==Action Items ==
 
==Action Items ==
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* Remove scintillator paddles from Collimator cave (Mark S)
+
* Stephanie to design thinner "L" bracket for the LV box
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* Bring lead sheets to vendor (Mark S)
+
* Tim - Get with S&A group to discuss chamber fiducialization and alignment
−
* Design stabilization for install of first assembly in Hall ( Stephanie)
+
* Rory to flatten lead target
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* Test install some chambers on absorbers in TEDF (Mark S)
+
* Stephanie to model and place scintillators and attachments
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* Update 3D model with Elton's lates config. (Stephanie)
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* Release installation drawings - Tim/Stephanie
−
* Verify Cables from DS chamber clear the cable trays ( Stephanie)
+
* continue work on target installation - Bobby
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* Work out plan with Nick on removing cables from vertical managers (Tim)
+
−
* Continue target design (Bobby)
+

Latest revision as of 15:19, 1 December 2021

Meeting Time and Place

Thursday November 18, 2021, 3:00pm Bluejeans https://bluejeans.com/465620466

  • Present - Elton, Dave, Stephanie, Ilya, Rory, Mark S, Beni, Simon, Mark I

Agenda

File:Cpp install assy.pdf
  • Installation/assy 3D Model and dwgs
    • DS Chamber orientation
    • Scintillator orientation
    • assembly components - drawings released
    • Installation drawings in review
  • Target Design in work
    Cpp target5.jpg
    Cpp target6.jpg
    Cpp target7.jpg
    Cpp target8.jpg


  • Things to work out
    • Gas system, manifold/bubblers (Beni has some)
    • Complete structural analysis - approved by Tom Renzo - need to release into system
    • Develop Detailed installation plan
    • Develop Design/operational/Maintenance Requirements
    • Modified US vacuum system
    • Solid target installation
    • Installation drawing including Microscope move
    • CPP Detector operations in Hall D OSP
    • Possible use of nitrogen flow for cooling electronics in Faraday cage

Minutes

  • Elton met with nick and discussed LV box. Need to make bracket smaller (1/16" thick) boxes should be on top-north corner of each chamber
  • For fiducializing chambers, all four edges or bolt holes can be used to find center. Machining is very accurate
  • Proposed chamber orientation good - horizontal x-ray port DS, Vertical x-ray port US
  • Rory/Elton requested 4 scintillator paddles, 2 BL and 2 BR in vertical position equally spaced (15" oc). To be held by light guides, maybe a V block
  • Lead Target needs to be pressed flat since it is malleable and has the center protruding

Action Items

  • Stephanie to design thinner "L" bracket for the LV box
  • Tim - Get with S&A group to discuss chamber fiducialization and alignment
  • Rory to flatten lead target
  • Stephanie to model and place scintillators and attachments
  • Release installation drawings - Tim/Stephanie
  • continue work on target installation - Bobby
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