Difference between revisions of "Π polarizability Meeting July 1, 2016"
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=Meeting Info.= | =Meeting Info.= | ||
== Meeting Time And Location == | == Meeting Time And Location == | ||
− | + | 10:30 EST (JLab time) | |
''CC A110'' | ''CC A110'' | ||
Line 45: | Line 45: | ||
# Announcements | # Announcements | ||
# FCAL Platform | # FCAL Platform | ||
− | # π<sup>+</sup>π<sup>-</sup> simulation (Elton) | + | # [[Media:20160701_FMWPC_cart.pdf|MWPC Transport Cart]] (Andrew, Matt) |
− | # [[Media: | + | # [[Media:20160701_MWPC_construction.pdf|MWPC Construction]](Rory) |
+ | # [https://logbooks.jlab.org/entry/3411645 π<sup>+</sup>π<sup>-</sup> simulation] (Elton) | ||
+ | # [[Media:20160701_CPPsim.pdf|CPPsim]] (David) | ||
# Next meeting | # Next meeting | ||
=Minutes= | =Minutes= | ||
+ | Attendees: Rory M. (chair), David L., Elton S., Andrew S., Mark D., Ilia L., Serguei G. | ||
− | ' | + | == Announcements == |
+ | * Chambers accidentally set 500V too high in lab. No obvious damage but brief procedure review will be done. | ||
+ | * Ilia (in attendance) will officially start with UMass on Aug. 25th (delayed due to visa issues) | ||
+ | * Bobby attended G4 workshop last week at MIT. Will be going to JLab in a couple of weeks and will work on simulation. | ||
+ | |||
+ | == Carts == | ||
+ | * Initial design for cart to hold and transport MWPC was shown. | ||
+ | * These are needed because the carts weigh a lot (couple of hundred pounds each) and have fragile electronics or gas couplings on every side and so must be held a couple of inches off the ground. | ||
+ | * Considering using these for transport to JLab as well since a similar structure will be needed. | ||
+ | |||
+ | == MWPC construction == | ||
+ | * HV boards have been attached to frame of full scale prototype | ||
+ | * Al plate gouges smoothed out to make surface smooth to the touch | ||
+ | * Machinist currently cutting grooves into G10. Some delays after first piece. | ||
+ | * Elton: FDC had to paint epoxy in grooves to prevent gas leaks | ||
+ | ** Rory spoke with Lubomir about that and had an understanding of technique. Will first attempt to polish grooves to see if that will suffice. | ||
+ | * Wire Stringing: | ||
+ | ** Using long threaded rod with thread pitch that is multiple of 1/10" | ||
+ | ** Typical threaded rod has poor accuracy over long lengths | ||
+ | ** More accurate to cut than to extrude (most are extruded) | ||
+ | ** Rod bows some under its own weight. Possible to prevent with a brace in the center | ||
+ | ** Looking for manufacturer willing to produce only a 1 or 2 rods | ||
+ | |||
+ | ==π<sup>+</sup>π<sup>-</sup> simulation== | ||
+ | * Elton simulated events produced by Justin's ρ -> π<sup>+</sup>π<sup>-</sup> generator | ||
+ | * Generator required [http://amptools.sourceforge.net/index.php/Main_Page AmpTools] package | ||
+ | * Configuration files documented in e-log entry (linked in agenda above) | ||
+ | * Currently configured for proton target with Coherent photon peak at 9GeV. Will update for future studies | ||
+ | |||
+ | == CPPsim == | ||
+ | * David showed comparison of CPPsim (GEANT 4) output with the hdgeant (GEANT 3) simulation | ||
+ | * Reasonable agreement for TOF and FCAL | ||
+ | ** Some fine structure doesn't match, but broad structure does | ||
+ | * FMWPC absorber needs to be verified (only present in CPPsim) | ||
+ | |||
+ | == Next Meeting == | ||
+ | |||
+ | The next meeting is scheduled for Fri. July 15th at 9:30 am JLab time |
Latest revision as of 19:32, 5 July 2016
Contents
Meeting Info.
Meeting Time And Location
10:30 EST (JLab time)
CC A110
Connecting
You can connect using BlueJeans Video conferencing (ID: 949 429 419). (Click "Expand" to the right for details -->):
- Make sure you have created a BlueJeans account via your JLab CUE account using this link:
- http://jlab.bluejeans.com (You should only need to do this once)
- Meeting ID: 949 429 419
- (you may need to type this in, depending how you connect)
- If connecting via Web Browser: click this link (no passcode is needed):
- 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
- If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
- Dial: 1 888 240 2560 (US or Canada only)
- or, List of International Numbers
- If connecting via Polycom unit:
- Dial 199.48.152.152 or bjn.vc
- Enter meeting ID above
Agenda
- Previous meeting: Jun. 7, 2016
- Announcements
- FCAL Platform
- MWPC Transport Cart (Andrew, Matt)
- MWPC Construction(Rory)
- π+π- simulation (Elton)
- CPPsim (David)
- Next meeting
Minutes
Attendees: Rory M. (chair), David L., Elton S., Andrew S., Mark D., Ilia L., Serguei G.
Announcements
- Chambers accidentally set 500V too high in lab. No obvious damage but brief procedure review will be done.
- Ilia (in attendance) will officially start with UMass on Aug. 25th (delayed due to visa issues)
- Bobby attended G4 workshop last week at MIT. Will be going to JLab in a couple of weeks and will work on simulation.
Carts
- Initial design for cart to hold and transport MWPC was shown.
- These are needed because the carts weigh a lot (couple of hundred pounds each) and have fragile electronics or gas couplings on every side and so must be held a couple of inches off the ground.
- Considering using these for transport to JLab as well since a similar structure will be needed.
MWPC construction
- HV boards have been attached to frame of full scale prototype
- Al plate gouges smoothed out to make surface smooth to the touch
- Machinist currently cutting grooves into G10. Some delays after first piece.
- Elton: FDC had to paint epoxy in grooves to prevent gas leaks
- Rory spoke with Lubomir about that and had an understanding of technique. Will first attempt to polish grooves to see if that will suffice.
- Wire Stringing:
- Using long threaded rod with thread pitch that is multiple of 1/10"
- Typical threaded rod has poor accuracy over long lengths
- More accurate to cut than to extrude (most are extruded)
- Rod bows some under its own weight. Possible to prevent with a brace in the center
- Looking for manufacturer willing to produce only a 1 or 2 rods
π+π- simulation
- Elton simulated events produced by Justin's ρ -> π+π- generator
- Generator required AmpTools package
- Configuration files documented in e-log entry (linked in agenda above)
- Currently configured for proton target with Coherent photon peak at 9GeV. Will update for future studies
CPPsim
- David showed comparison of CPPsim (GEANT 4) output with the hdgeant (GEANT 3) simulation
- Reasonable agreement for TOF and FCAL
- Some fine structure doesn't match, but broad structure does
- FMWPC absorber needs to be verified (only present in CPPsim)
Next Meeting
The next meeting is scheduled for Fri. July 15th at 9:30 am JLab time