Attendees: Rebecca, Alex, Armin, Eliazar, Marc


  • Announcements
    • Alex going on vacation 8/1 - 8/21
    • Rebecca Jury Duty 8/1
    • PDR ASAP???
    • Laser PRD R1?
  • PDR Prep
    • August 22-26
    • Ray trace
    • slides
    • committee
      • Detector/scientists?
      • one ME
  •  Documents:
    • Instrument ESD - Released
    • Completed vacuum analysis and completed engineering note
    • MFX + XPP mega schematic - Elena done w/mechanical - DSG-000032289; and vacuum- DSG-000032285; awaiting input from others. - when to circle back to discuss ?? wait for CXI–Will will be helping Serge with this at some point??
    • ESD - LCLSII-HE-1.4-ES-0476
    • Laser PRD-Alex looking for written agreement - this week?
      • Alex to complete next vers based on TRAs
    • ICD-Lasers - access on working site: https://slac.sharepoint.com/:w:/r/sites/lcls/lcls-2-he/wd/ICD/LCLS-II%20HE%20MFX%20Lasers%20ICD.docx?d=w73e52e9056f94e0cb9df481c8cd63f6d&csf=1&web=1&e=hJLtqF
      • Rebecca/Corey : goal edits in 2 weeks - making progress...almost done
    • ICD - controls
      • commented on controls ICD 
      • complete
    • RDS- released. - might need to revisit
      • drawings to communicate
      • installation schedule coordination
    • Equipment anchoring BIO review - in process (Elena)
      • stands
      • stopper
  • Controls Coordination - meet up to discuss status, PDR plans
    • Review ICDs- add line in table for rack hardware?
    • Cost estimates 
    • Stand profiles - XRT, Hutch
    • Maggie and Vincent are POCs - maggie is out for a few weeks.
    • Rack Plan - next week
    • Hardware is in mechanical scope- controllers in controls scope
    • out of scope items - older vac equipment, cameras, and motors etc. : how is this tracked?
      • all new items will be addressed by this project
      • maintenance items should be addressed by operations program
  • Laser coordination
    • check-in on Monday - check in on docs beforehand
    • stayclear cubes --add to models (corey will add to his assemblies)
    • monthly combo meeting - engineering or requirements/science? next on Feb 28th.
      • ICDs
      • PRD
      • Other...
    • Model -
    • transport line is now under raised floor — please verify height is correct.
      • can we move downstream 1.5"?
      • can we shorten first drift segment by 9" to move flange away from cross member?
      • interference with stand → igor is designing new cross braces
      • raised laser table → no showstopper issues ?
        • maybe extra bracing down the line -
      • stay-clears for in-between laser table and diagnostic stand - interface is tricky
        • LSS safety system shutters are there
        • controls need access
    • Ongoing requirements negotiations/meetings
      • liquid phase chemistry stuff wasn't really captured → meeting on Monday with Tim VD/Roberto?
      • review of historical laser parameter requests
      • Tim was invited to last mtg. and explained his requirements
      • NO NEED FOR CHANGES. Written Agreement pending. (CC DF)
    • we are also ready to design laser out-coupling when laser team has details/requirements available
      • Does the detector situation matter? beam tube size? this geometry is important...
      • ideal hole diameter?
      • what is needed?
      • what is common ?
      • document on confluence and eventually in PRD
    • Resend Z location info to M. Greenberg - help him figure out divergence etc. which will let us know what hole diameter we need...
    • thermal issues (see below)
    • ICD–up on working site? (add link)
  • Facilities coordination - need to start discussing
    • Laser transport penetration. in RDS? double check.
    • Humidity data to be taken - sensor recommendations? locations? humidity stability affects the mirror stability more than the temperature???
    • Temp enclosure info? --need to find out status??? ask matt ? ask danny?
      • assume similar to xrt? 80/20 frame with thin walls?
    • When can we set up temp monitoring?- Alex found data!
    • Add more sensors!!
      1. near CXI KB location (1 min sampling rate)
      2. near MFX KB location (1 min sampling rate)
      3. near Laser table (1 min sampling rate)
    • Detector Cooling
    • Room Temperature control - can we control temperature locally at/near MODS table? easier? - first we need requirements
      • +/- .1 deg stability target - what does "facilities" think of this?
      • where exactly is stability needed?
      • air flow rate?
      • think about cable runs and duct work - maybe we can add in next revision run
      • do we have data?  we have data at the exit window...moar data needed? can we turn temp sensor on? with data logger?
      • open air flow meter? should we do this?
      • environment around mirror systems need special consideration?
      • Joe also has some data (tyler johnson has designed some environmental sensor boards)
      • stability more important than accuracy of temp - can we control this operationally (letting things warm up and settle?)
      • timing impact
      • pointing impact
      • local control may not be possible → room data sheet?
        • get some data about current air handling system for a reference point
  • Photon Dump electronics kickoff with BCS folks
    • Nate(CAM), Eddie (PPS control lead), Matt(sys manager), John (Bcs control lead)
    • reviewed RP requirements - need some docs
  • Exit window
    • 100um - 150um? - do we still need to specify? or analysis driven? prototype driven...
    • safety device? - no
    • fast shutters? - no
  • Radiation safety
    • Dump sizing plot:
      • photon dump design
        • ESD in progress with mechanics specified
        • need a controls engineer (to complete prelim design of electronics and complete ESD)
      • MFX_DumpResults_SteadyState_1-24-2022.docx
      • energy? Alyssa has considered 3keV...
      • 200W? what is necessary to consider?
      • Alex send email with request to change some parameters
    • air attenuation in XRT enough? Yiping/Lin - early Feb
      • progress meeting soon
    • ray trace - progress beginning
      • data gathering in process
      • methodology? not decided yet
      • team? may ling, cherie landa, lance lee
      • prep ray trace data
      • MEC lockout? timeline?
    • KB
      • chiller check - rack space
      • check perimeter (for enclosure)
      • check vac options - "aiming foe 5e-10 in mirror chamber"
        • check outgassing of mirror chamber - Ali has smaller
        • run w/out safety factor for reference
        • add pumps on PPM
    • exit windows - failure modes?
  • Detector - MIE
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