Difference between revisions of "Pi0 Polarizability Meeting Apr 23, 2021"
From GlueXWiki
(→Tentative Agenda) |
(→Minutes) |
||
(10 intermediate revisions by the same user not shown) | |||
Line 42: | Line 42: | ||
== Action Items == | == Action Items == | ||
− | # Read new draft of Sergey's paper (Elton and Rory) | + | # <strike> Read new draft of Sergey's paper (Elton and Rory) </strike> Both Elton and Rory provided comments |
== Tentative Agenda == | == Tentative Agenda == | ||
Line 48: | Line 48: | ||
# Action Items | # Action Items | ||
# Theory Update | # Theory Update | ||
− | #* Status and plans for documenting | + | #* Status and plans for documenting theoretical work |
# [https://userweb.jlab.org/~ilarin/npp/gevs_031221.pdf Calculations by Sergey Gevorkyan] | # [https://userweb.jlab.org/~ilarin/npp/gevs_031221.pdf Calculations by Sergey Gevorkyan] | ||
# [[Media:Gevorkyan PRC80(2009)055201.pdf | Gevorkyan et al PRC 80 (2009) 055201]] | # [[Media:Gevorkyan PRC80(2009)055201.pdf | Gevorkyan et al PRC 80 (2009) 055201]] | ||
Line 58: | Line 58: | ||
= Minutes = | = Minutes = | ||
− | ''Attending: | + | ''Attending: Alex, Beni, Elton, Rory, Ilya, Mark, Jose |
+ | |||
+ | # Announcements | ||
+ | #* JLab seminar at noon is on g-2 | ||
+ | # Action Items | ||
+ | # Experiment Update | ||
+ | # [[CPP and NPP Readiness Review]] | ||
+ | #* Elton reviewed paragraphs related to MWPC rates and data rates. | ||
+ | #* The draft was updated based on feedback from Ilya and Rory. | ||
+ | #* Beni noted that the thresholds for the TOF are well-below the Landau Peak and are already as low as possible above noise to maximize efficiency. We do not expect to lower them for CPP. | ||
+ | #* We drafted a response to the question about data rates, using the typical rates from GlueX I, which should be typical for CPP. No changes are expected due to TOF thresholds. | ||
+ | # X-rays in beam, see [https://logbooks.jlab.org/entry/3618696 Log Entry 3618696] | ||
+ | #* We sent some time on the GlueX experience with X-rays in the beam | ||
+ | #* It is unclear how this background may affect CPP, as it is heavily shielded by iron absorbers. Also the Pb target may be an effective filter. | ||
+ | #* We might wish to add a test plan during commissioning to study this background | ||
+ | #* Rory mentioned that Mainz has some experience with "hardening photon beams" by adding material as generate a low-energy photon cutoff. | ||
+ | # Theory Update (Jose) | ||
+ | #* Jose plans to complete work and document effort for the proposal. | ||
+ | #* He should be able to update us toward the end of the summer. | ||
+ | #* There are two promising undergraduates students that will work with him next fall. They will complete any unfinished calculations and fill in the documentation. It should be a nice project for them. | ||
+ | #* Status and plans for documenting theoretical work | ||
+ | # [https://userweb.jlab.org/~ilarin/npp/gevs_031221.pdf Calculations by Sergey Gevorkyan] | ||
+ | #* [[Media:Gevorkyan PRC80(2009)055201.pdf | Gevorkyan et al PRC 80 (2009) 055201]] | ||
+ | #* Elton: Sent comments via email this morning. The draft is converging. Keeping the appendix may be useful for consistency and support of detailed equations. | ||
+ | #* Rory: Should review the discussion around Eq. 6, where the limit is taken for large 2pi mass. | ||
+ | #* Rory: suggests to add data points to Fig. 3, which would add credibility to the calculation. | ||
+ | #* Ilya is in touch with Sergey, who is responding to several small questions. | ||
+ | # Trigger | ||
+ | # Other business | ||
+ | #* Rory: Eugene responded to inquiry about procedure for moving MWPCs to JLab. Here is his response | ||
+ | |||
+ | As far as I understand: | ||
+ | - The visit and work on site has to be approved by AD | ||
+ | - They have to follow the registration procedure | ||
+ | - In order not to stay in a local quarantine after arrival they need to be fully vaccinated | ||
+ | (the certificate may need to be presented to the Occupational MED) | ||
+ | - They have to do all the training including the MEDCON training, TOSP, and follow the rules | ||
+ | (masks, distancing etc) | ||
+ | - One has to figure out if they need to work at <6ft distance from each other. In such a case | ||
+ | PPE is needed (another training etc). | ||
+ | - To start the paperwork we need a more or less detailed plan. | ||
+ | Regards, | ||
+ | Eugene | ||
+ | |||
+ | #* Beni agreed to draft a plan for receiving and testing the MWPCs. He will enter it into the HDList. | ||
+ | #* Beni has gotten the ok to receive and test the MWPCs in EEL-126, where electronics and DAQ is available. The electronics lab is nearby. [Vlad has a test setup there.] | ||
+ | # Next meeting | ||
+ | #* May 7, 11:00 am. |
Latest revision as of 14:28, 23 April 2021
Contents
Meeting Information
Meeting Time And Location
11:00 am ET (JLab time)
REMOTE
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: (408) 740-7256 (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
Action Items
-
Read new draft of Sergey's paper (Elton and Rory)Both Elton and Rory provided comments
Tentative Agenda
- Announcements
- Action Items
- Theory Update
- Status and plans for documenting theoretical work
- Calculations by Sergey Gevorkyan
- Gevorkyan et al PRC 80 (2009) 055201
- Experiment Update
- CPP and NPP Readiness Review
- Trigger
- Other business
- Next meeting
Minutes
Attending: Alex, Beni, Elton, Rory, Ilya, Mark, Jose
- Announcements
- JLab seminar at noon is on g-2
- Action Items
- Experiment Update
- CPP and NPP Readiness Review
- Elton reviewed paragraphs related to MWPC rates and data rates.
- The draft was updated based on feedback from Ilya and Rory.
- Beni noted that the thresholds for the TOF are well-below the Landau Peak and are already as low as possible above noise to maximize efficiency. We do not expect to lower them for CPP.
- We drafted a response to the question about data rates, using the typical rates from GlueX I, which should be typical for CPP. No changes are expected due to TOF thresholds.
- X-rays in beam, see Log Entry 3618696
- We sent some time on the GlueX experience with X-rays in the beam
- It is unclear how this background may affect CPP, as it is heavily shielded by iron absorbers. Also the Pb target may be an effective filter.
- We might wish to add a test plan during commissioning to study this background
- Rory mentioned that Mainz has some experience with "hardening photon beams" by adding material as generate a low-energy photon cutoff.
- Theory Update (Jose)
- Jose plans to complete work and document effort for the proposal.
- He should be able to update us toward the end of the summer.
- There are two promising undergraduates students that will work with him next fall. They will complete any unfinished calculations and fill in the documentation. It should be a nice project for them.
- Status and plans for documenting theoretical work
- Calculations by Sergey Gevorkyan
- Gevorkyan et al PRC 80 (2009) 055201
- Elton: Sent comments via email this morning. The draft is converging. Keeping the appendix may be useful for consistency and support of detailed equations.
- Rory: Should review the discussion around Eq. 6, where the limit is taken for large 2pi mass.
- Rory: suggests to add data points to Fig. 3, which would add credibility to the calculation.
- Ilya is in touch with Sergey, who is responding to several small questions.
- Trigger
- Other business
- Rory: Eugene responded to inquiry about procedure for moving MWPCs to JLab. Here is his response
As far as I understand: - The visit and work on site has to be approved by AD - They have to follow the registration procedure - In order not to stay in a local quarantine after arrival they need to be fully vaccinated (the certificate may need to be presented to the Occupational MED) - They have to do all the training including the MEDCON training, TOSP, and follow the rules (masks, distancing etc) - One has to figure out if they need to work at <6ft distance from each other. In such a case PPE is needed (another training etc). - To start the paperwork we need a more or less detailed plan. Regards, Eugene
- Beni agreed to draft a plan for receiving and testing the MWPCs. He will enter it into the HDList.
- Beni has gotten the ok to receive and test the MWPCs in EEL-126, where electronics and DAQ is available. The electronics lab is nearby. [Vlad has a test setup there.]
- Next meeting
- May 7, 11:00 am.