Difference between revisions of "October 05, 2022 FCAL Insert Installation Meeting"
From GlueXWiki
| Line 50: | Line 50: | ||
** Can we use scaffolding on the temporary platform? | ** Can we use scaffolding on the temporary platform? | ||
* Discussed insulation vacuum vs. standard - standard foam board ok since delta T is small | * Discussed insulation vacuum vs. standard - standard foam board ok since delta T is small | ||
| + | |||
| + | * Discussed monitoring panel design for the crystals in a separate meeting | ||
| + | ** Arshak showed his testing and baseline design | ||
| + | *** Optical fibers coming in on all 4 outer edges (120 fibers for now) | ||
| + | *** 1/2" acrylic sheet in 2 pieces | ||
| + | ** Discussed how to route fibers | ||
| + | *** through holes in FCAL2 step frames - bushings needed | ||
| + | *** route over glass module monitoring panel | ||
| + | *** maybe have fiber connections at upstream surface and install with rohacell backbone and tungsten absorber as an assembly | ||
| + | *** is there 90° connectors for fibers or generous bend radius needed? | ||
| + | ** Discussed supporting outer edges of panel to rohacell for stability | ||
== Action Items == | == Action Items == | ||
| Line 56: | Line 67: | ||
* Update baseline schedule with additional items discussed - Scot | * Update baseline schedule with additional items discussed - Scot | ||
* Come up with a written cable mapping plan - Sasha | * Come up with a written cable mapping plan - Sasha | ||
| + | * Update 3D model for patch panels - Stephanie | ||
| + | * Develop cable routing plan under platform - Tim/Scot/Stephanie | ||
| + | * Check on use of scaffolding on the platform - Scot | ||
* | * | ||
Revision as of 14:48, 11 October 2022
Meeting Time and Place
Wednesday October 05, 2022 10am At Jefferson Lab, Hall D Counting House and on Teams
Agenda
- Minutes from last meeting https://halldweb.jlab.org/wiki/index.php/October_07,_2022_FCAL_Insert_Installation_Meeting
- Discuss Lead Glass and crystal module removal/install] - Sasha
- Use of platform upstream of detector - Stephanie/Tim
- Discuss cable mapping - Sasha
- Existing cables
- New Cables
- Cable quotes 0 Chris S.
- Existing structure can support 2500lbs
- Monitoring system discussion directly after
- Assembly in ESB
- Media:FCAL2_strawman_schedule.pdf
Minutes
- Discussed lead glass module removal/install
- Lead glass blocks will be installed as they are now with alternating SS vertical and then horizontal
- Refurbishing existing module bases is about 1 hour for Malte and Mark, but Chris S. also has to do very delicate work also
- Students may help base repairs but ES&H input would be needed
- Since there is no time to design, test and fabricate new bases for the existing modules, we will stick to repairing existing bases
- The worst bases should be removed in March before taking apart the detector so the repairs can be started
- More detail needed on existing module refurbish plan
- Mark D. has database for existing module and will come up with an initial plan for sorting
- Existing cables that may be used need to be relabeled and put in database
- Eugene expressed that we should work with the mini FCAL to develop the removal/refurbish plan
- Cable discussions
- Fernando expressed that in the tight area, LV cables should not be ribbon cables - 1 cable for each base should be used
- Revisited signal cable plan to come from downstream wall through patch panel - Mark D. not at previous meeting - seems ok
- Six patch panels in all for all new cables - need to start designing this for dark room and reinforcements needed
- Existing I-beam over dark room should handle additional cable weight
- Need to look at cable routing under platform and come up with a layout
- Sasha needs to come up with a cable mapping plan to help reach decisions on using existing cables or removing all
- Chris S. will ship out 1200 signal cables to get terminated
- Chris S. to get quote on additional 400 signal cables
- Chris already request quote for 1600 new thin (RG174) signal cables to go from patch panel to detectors
- Looked at using the existing BCAL install platform on the upstream side of the FCAL.
- We should probably use this regardless of decision to remove cables from crates
- Can we use scaffolding on the temporary platform?
- Discussed insulation vacuum vs. standard - standard foam board ok since delta T is small
- Discussed monitoring panel design for the crystals in a separate meeting
- Arshak showed his testing and baseline design
- Optical fibers coming in on all 4 outer edges (120 fibers for now)
- 1/2" acrylic sheet in 2 pieces
- Discussed how to route fibers
- through holes in FCAL2 step frames - bushings needed
- route over glass module monitoring panel
- maybe have fiber connections at upstream surface and install with rohacell backbone and tungsten absorber as an assembly
- is there 90° connectors for fibers or generous bend radius needed?
- Discussed supporting outer edges of panel to rohacell for stability
- Arshak showed his testing and baseline design
Action Items
- Send out 1200 signal cables to get terminated - Chris S.
- Start looking at how to use the existing database for lead glass handling - Mark D
- Update baseline schedule with additional items discussed - Scot
- Come up with a written cable mapping plan - Sasha
- Update 3D model for patch panels - Stephanie
- Develop cable routing plan under platform - Tim/Scot/Stephanie
- Check on use of scaffolding on the platform - Scot
