Difference between revisions of "Π polarizability Meeting May 5, 2021"

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(Created page with "== Meeting Time And Location == 09:00 EST (JLab time) Electronics Discussion REMOTE during Covid-19 ==Connecting== <div class="toccolours mw-collapsible mw-collapsed"> You c...")
 
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== Action Items ==
 
== Action Items ==
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== Agenda (Weekly CPP Meeting) 09:00 am ==
 
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# CPP Beamline meeting: [[&pi; polarizability Meeting Jan 28, 2021|Jan 28, 2021]]
 
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# Previous CPP meeting: [[&pi; polarizability Meeting Jan 27, 2021|Jan 27, 2021]]
 
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# Announcements
 
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# Action Items
 
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# [[CPP and NPP Readiness Review]]
 
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# Data Analysis
 
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# PID + AI
 
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# Other business
 
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# Next meeting
 
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== Minutes ==
 
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'' Attending: Mark, Rory, Elton, Ilya, Andrew, David, Simon
 
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# CPP Beamline meeting: [[&pi; polarizability Meeting Jan 28, 2021|Jan 28, 2021]]
 
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# Previous CPP meeting: [[&pi; polarizability Meeting Jan 27, 2021|Jan 27, 2021]]
 
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# Announcements
 
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# Action Items
 
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# [[CPP and NPP Readiness Review]]
 
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#* Rory went over the outline of his talk, which is based on the Jeopardy Review.
 
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#* Elton went over the [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4898 draft slides] and there was feedback.
 
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#* We will review the slides again tomorrow afternoon with Tim.
 
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# Data Analysis
 
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#* Andrew: Presented latest analysis, which shows that the azimuthal asymmetry distribution is not symmetric.
 
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#* Elton: This may have been seen previously and could be due to the the beam position being offset. Andrew will check with Alex A.
 
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# Next meeting
 
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#* Next Wed, Feb 10 is the ERR and the following is the collaboration meeting.
 
  
 
== Agenda (Electronics Discussion) 10:00 am ==
 
== Agenda (Electronics Discussion) 10:00 am ==
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# Discussion (All)
 
# Discussion (All)
  
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== Minutes ==
 
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'' Attending: Rory, Elton, Ilya, Andrew, Simon, Hovanes, Fernando, Nick, Chris (did I miss anyone?)
 
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# Announcements
 
 
# [[CPP and NPP Readiness Review]]
 
# [[CPP and NPP Readiness Review]]
 
# [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4898 Elton Draft Slides]
 
# [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4898 Elton Draft Slides]
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#* We went over a couple of slides on electronics (slides 4 and 5) in Elton's draft presentation to the ERR
 
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#* There was substantive discussion and feedback on several points. From my notes, please send corrections/comments:
 
 
# FADC cables
 
# FADC cables
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#* Original CDC,FDC cables from Amphenol are obsolete. Cable used for prototype in beam is also no longer available
 
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#* Chris has ordered a short section of a new cable that should work. He will check that the assembly with connector all fits.
 
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#* We need a length before the cable is ordered. Now that we have located the location of the rack, we will ask Stephanie to estimate the cable length.
 
 
# LV supplies/cable
 
# LV supplies/cable
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#* Recall: Each chamber requires two +5 and two -5 supplies: Rory: Each supply draws 1 A, i.e. 2x2=4 A per chamber -> 20 W/chamber
 
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#* Fernando: Each MPOD channel delivers 5 A -> can channel supplies one chamber -> need six channels. [Question: In my notes I have that we need six +5V and six -5V = 12 channels?]
 
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#* We will need cables that connect the MPOD supply to the chamber, which has banana plug connections.
 
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#* Hovanes: For the slow control need to know whether one needs control of +/- voltages separately. It was decided that the +/-5 volts can be tied together.
 
 
# HV supply/cable
 
# HV supply/cable
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#* There is a CAEN HV crate on the upstream south rack and has sufficient space. There is a Drift Chamber card, but it takes the Radial connector (not SHV)
 
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#* There are two options: a) find a card with SHV connectors (I don't think Hall D has any), b) fabricate a Radial-Radial connector and a box with Radial input and SHV outputs (Hall B has made some of these)
 
 
# Slow Controls:
 
# Slow Controls:
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#* Hovanes: The slow controls can be implemented once the specifications are fixed
 
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#* Tripping on current is part of the HV supply and normal for chambers
 
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#* Ramp rate
 
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#* Define interlocks: temperature? CDC and FCD have temperature interlocks
 
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#* Rory: the electronics is enclosed in a shield, generating 20 W.
 
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#* Nick will purchase thermistors (or thermocouple), one for each chamber. They can be added to the PLC on the platform
 
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#* Gas system: Final design has not been completed, but a relatively simple setup is envisioned. Rory: Proposes six flow meters (one per chamber) set at 5 cc/s. Each chamber will have its own bubbler with a camera to check flow. Beni: He has bubblers in his office.
 
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#* The specification needs to fe finalized before controls are addressed.
 
 
# Heating of electronics
 
# Heating of electronics
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#* This was discussed in some length
 
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#* Fernando: Suggests adding an inlet and outlet to the electronics box, which could be used to flow gas through the electronics in case it is needed.
 
 
# Next meeting
 
# Next meeting
 
#* We will reconvene to try to nail down the loose ends.
 
#* We will reconvene to try to nail down the loose ends.
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== Minutes ==
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'' Attending:

Revision as of 14:31, 28 April 2021

Meeting Time And Location

09:00 EST (JLab time) Electronics Discussion

REMOTE during Covid-19

Connecting

You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):

  1. Make sure you have created a BlueJeans account via your JLab CUE account using this link:

  2. Meeting ID: 949 429 419
    • (you may need to type this in, depending how you connect)

  3. If connecting via Web Browser: click this link (no passcode is needed):

  4. If connecting via iOS or Android App:
    • Use your JLab e-mail address to log in and then enter the meeting ID given above to join the meeting

  5. If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"

  6. If connecting via Polycom unit:
    • Dial 199.48.152.152 or bjn.vc
    • Enter meeting ID above



Action Items

Agenda (Electronics Discussion) 10:00 am

  • Discussion on Electronics for CPP
  1. Announcements
  2. CPP and NPP Readiness Review
  3. Elton Draft Slides
  4. Components
    • FADCs, moving the CDC crate electronics
    • Signal cables
    • HV connections to CAEN supply
    • HV cables
    • LV supplies, MPODs?
    • LV cables/connections
  5. Discussion (All)
  1. CPP and NPP Readiness Review
  2. Elton Draft Slides
  3. FADC cables
  4. LV supplies/cable
  5. HV supply/cable
  6. Slow Controls:
  7. Heating of electronics
  8. Next meeting
    • We will reconvene to try to nail down the loose ends.

Minutes

Attending:

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