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

From GlueXWiki
Jump to: navigation, search
(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...")
 
(→‎Action Items for next meeting)
 
(13 intermediate revisions by 2 users not shown)
Line 43: Line 43:
 
== Action Items ==
 
== Action Items ==
  
−
== Agenda (Weekly CPP Meeting) 09:00 am ==
+
== Agenda (Electronics Discussion) 09:00 am ==
−
# CPP Beamline meeting: [[&pi; polarizability Meeting Jan 28, 2021|Jan 28, 2021]]
+
−
# Previous CPP meeting: [[&pi; polarizability Meeting Jan 27, 2021|Jan 27, 2021]]
+
−
# Announcements
+
−
# Action Items
+
−
# [[CPP and NPP Readiness Review]]
+
−
# Data Analysis
+
−
# PID + AI
+
−
# Other business
+
−
# Next meeting
+
−
 
+
−
== Minutes ==
+
−
'' Attending: Mark, Rory, Elton, Ilya, Andrew, David, Simon
+
  
−
# CPP Beamline meeting: [[&pi; polarizability Meeting Jan 28, 2021|Jan 28, 2021]]
 
−
# Previous CPP meeting: [[&pi; polarizability Meeting Jan 27, 2021|Jan 27, 2021]]
 
 
# Announcements
 
# Announcements
−
# Action Items
+
# Previous CPP Electronics meeting: [[&pi; polarizability Meeting Feb 3, 2021|Feb 3, 2021]]
 +
# Previous CPP: [[&pi; polarizability Meeting Apr 28, 2021|Apr 28, 2021]]
 
# [[CPP and NPP Readiness Review]]
 
# [[CPP and NPP Readiness Review]]
−
#* Rory went over the outline of his talk, which is based on the Jeopardy Review.
+
# FADC cables
−
#* Elton went over the [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4898 draft slides] and there was feedback.
+
# LV supplies/cable
−
#* We will review the slides again tomorrow afternoon with Tim.
+
# HV supply/cable
−
# Data Analysis
+
# Slow Controls
−
#* Andrew: Presented latest analysis, which shows that the azimuthal asymmetry distribution is not symmetric.
+
# Heating of electronics
−
#* Elton: This may have been seen previously and could be due to the the beam position being offset. Andrew will check with Alex A.
+
# [https://halldweb.jlab.org/talks/2021/draft_tosp_FMWPC.pdf draft TOSP] for testing in EEL 126(TOSP # 115501)
 
# Next meeting
 
# Next meeting
−
#* Next Wed, Feb 10 is the ERR and the following is the collaboration meeting.
 
−
 
−
== Agenda (Electronics Discussion) 10:00 am ==
 
−
* Discussion on Electronics for CPP
 
−
 
−
# Announcements
 
−
# [[CPP and NPP Readiness Review]]
 
−
# [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4898 Elton Draft Slides]
 
−
# Components
 
−
#* FADCs, moving the CDC crate electronics
 
−
#* Signal cables
 
−
#* HV connections to CAEN supply
 
−
#* HV cables
 
−
#* LV supplies, MPODs?
 
−
#* LV cables/connections
 
−
# Discussion (All)
 
  
 
== Minutes ==
 
== Minutes ==
−
'' Attending: Rory, Elton, Ilya, Andrew, Simon, Hovanes, Fernando, Nick, Chris (did I miss anyone?)
+
'' Attending: Albert, Fernando, Beni, Chris, Hovanes, Mark, Rory, Tim, Elton, Alex, Ilya
  
 
# Announcements
 
# Announcements
 +
#* We have submitted our response to the ERR. Stepan and Patrizia have acknowledged receipt.
 +
# Previous CPP Electronics meeting: [[&pi; polarizability Meeting Feb 3, 2021|Feb 3, 2021]]
 
# [[CPP and NPP Readiness Review]]
 
# [[CPP and NPP Readiness Review]]
−
# [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=4898 Elton Draft Slides]
 
−
#* We went over a couple of slides on electronics (slides 4 and 5) in Elton's draft presentation to the ERR
 
−
#* There was substantive discussion and feedback on several points. From my notes, please send corrections/comments:
 
 
# FADC cables
 
# FADC cables
−
#* Original CDC,FDC cables from Amphenol are obsolete. Cable used for prototype in beam is also no longer available
+
#* Chris has ordered a short section of a new cable that should work. He has not had time to put on the connectors.
−
#* Chris has ordered a short section of a new cable that should work. He will check that the assembly with connector all fits.
+
#* We need to confirm length of cables with Stephanie, which we can do tomorrow at the CPP design meeting (Elton)
−
#* 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.
+
#* We can use the cables used for the prototype to get the first MWPCs working in the EEL. Need to put our hands on them. (Check with Mark Stevens)
 
# LV supplies/cable
 
# LV supplies/cable
 
#* 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
 
#* 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
−
#* 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?]
+
#* Fernando: Each MPOD channel delivers 5 A -> can channel supplies one chamber -> need six channels.  
−
#* We will need cables that connect the MPOD supply to the chamber, which has banana plug connections.
+
#* Discussion about removing banana plugs from chamber and connecting chamber to an appropriate connector that can be used to plug into a "L" transition piece to the D-sub connector to MPODs. Final determination will be made when the first shipment of chambers comes to JLab.
−
#* 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.
+
#* Rory: the LV on the chamber is separated into a right and left side; both sides need connections to +/-5 V.
 +
#* The MPODs will be located in the DIRC/CCAL LV crate.
 
# HV supply/cable
 
# HV supply/cable
−
#* 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)
+
#* There is a CAEN HV crate on the upstream south rack and has sufficient space, presently used for CCAL. There is a Drift Chamber card, but it takes the Radial connector (not SHV)
−
#* 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)
+
#* We require a single SHV connection per MWPC plane.
 +
#* Ideally we can add a noise filtering box on the output of the HV supplies before transition to the SHV connector.
 +
#* Beni will check to see if the HV on the CDC is segmented by quadrants so we could potentially borrow one of the existing filtering boxes for the MWPCs.
 
# Slow Controls:
 
# Slow Controls:
−
#* Hovanes: The slow controls can be implemented once the specifications are fixed
+
#* Hovanes: Once the hardware has been defined, CPP (Beni) should present requirements to the Slow Controls meeting, so that responsibilities can be assigned and the software can be developed
−
#* Tripping on current is part of the HV supply and normal for chambers
+
#* Hovanes: Does the Ar/CO2 gas stratify in the premixed bottles? (Rory will inquire)
−
#* Ramp rate
+
#* Systems: HV, LV, gas, heat monitoring in enclosure
−
#* Define interlocks: temperature? CDC and FCD have temperature interlocks
+
−
#* Rory: the electronics is enclosed in a shield, generating 20 W.
+
−
#* Nick will purchase thermistors (or thermocouple), one for each chamber. They can be added to the PLC on the platform
+
−
#* 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.
+
−
#* The specification needs to fe finalized before controls are addressed.
+
 
# Heating of electronics
 
# Heating of electronics
−
#* This was discussed in some length
+
#* Rory: Plan to add a swage connector for gas that could be used to supply dry nitrogen to each enclosure.
−
#* 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.
+
# [https://halldweb.jlab.org/talks/2021/draft_tosp_FMWPC.pdf draft TOSP] for testing in EEL 126(TOSP # 115501)
 
# Next meeting
 
# Next meeting
−
#* We will reconvene to try to nail down the loose ends.
+
#* We will reconvene once the first shipment of chambers have arrived and we have had time to evaluate connections.
 +
 
 +
== Action Items for next meeting==
 +
# Obtain lengths of cables (Elton)
 +
# Check with Mark Stevens about the location of cables used for prototype (Chris Stanislav)
 +
# Check mapping of HV on the CDC to see if they map onto a single quadrant (Beni)
 +
# Add swage gas connection to MWPC electronic enclosures (Rory)
 +
# Investigate if settling (stratification) of Ar/CO2 is a problem in premixed bottles (Rory)
 +
# Feedback to draft TSOP developed by Beni (Rory, Fernando, Elton)

Latest revision as of 14:09, 5 May 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) 09:00 am

  1. Announcements
  2. Previous CPP Electronics meeting: Feb 3, 2021
  3. Previous CPP: Apr 28, 2021
  4. CPP and NPP Readiness Review
  5. FADC cables
  6. LV supplies/cable
  7. HV supply/cable
  8. Slow Controls
  9. Heating of electronics
  10. draft TOSP for testing in EEL 126(TOSP # 115501)
  11. Next meeting

Minutes

Attending: Albert, Fernando, Beni, Chris, Hovanes, Mark, Rory, Tim, Elton, Alex, Ilya

  1. Announcements
    • We have submitted our response to the ERR. Stepan and Patrizia have acknowledged receipt.
  2. Previous CPP Electronics meeting: Feb 3, 2021
  3. CPP and NPP Readiness Review
  4. FADC cables
    • Chris has ordered a short section of a new cable that should work. He has not had time to put on the connectors.
    • We need to confirm length of cables with Stephanie, which we can do tomorrow at the CPP design meeting (Elton)
    • We can use the cables used for the prototype to get the first MWPCs working in the EEL. Need to put our hands on them. (Check with Mark Stevens)
  5. LV supplies/cable
    • 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
    • Fernando: Each MPOD channel delivers 5 A -> can channel supplies one chamber -> need six channels.
    • Discussion about removing banana plugs from chamber and connecting chamber to an appropriate connector that can be used to plug into a "L" transition piece to the D-sub connector to MPODs. Final determination will be made when the first shipment of chambers comes to JLab.
    • Rory: the LV on the chamber is separated into a right and left side; both sides need connections to +/-5 V.
    • The MPODs will be located in the DIRC/CCAL LV crate.
  6. HV supply/cable
    • There is a CAEN HV crate on the upstream south rack and has sufficient space, presently used for CCAL. There is a Drift Chamber card, but it takes the Radial connector (not SHV)
    • We require a single SHV connection per MWPC plane.
    • Ideally we can add a noise filtering box on the output of the HV supplies before transition to the SHV connector.
    • Beni will check to see if the HV on the CDC is segmented by quadrants so we could potentially borrow one of the existing filtering boxes for the MWPCs.
  7. Slow Controls:
    • Hovanes: Once the hardware has been defined, CPP (Beni) should present requirements to the Slow Controls meeting, so that responsibilities can be assigned and the software can be developed
    • Hovanes: Does the Ar/CO2 gas stratify in the premixed bottles? (Rory will inquire)
    • Systems: HV, LV, gas, heat monitoring in enclosure
  8. Heating of electronics
    • Rory: Plan to add a swage connector for gas that could be used to supply dry nitrogen to each enclosure.
  9. draft TOSP for testing in EEL 126(TOSP # 115501)
  10. Next meeting
    • We will reconvene once the first shipment of chambers have arrived and we have had time to evaluate connections.

Action Items for next meeting

  1. Obtain lengths of cables (Elton)
  2. Check with Mark Stevens about the location of cables used for prototype (Chris Stanislav)
  3. Check mapping of HV on the CDC to see if they map onto a single quadrant (Beni)
  4. Add swage gas connection to MWPC electronic enclosures (Rory)
  5. Investigate if settling (stratification) of Ar/CO2 is a problem in premixed bottles (Rory)
  6. Feedback to draft TSOP developed by Beni (Rory, Fernando, Elton)
Retrieved from "https://halldweb.jlab.org/wiki/index.php?title=Π_polarizability_Meeting_May_5,_2021&oldid=105038"