Difference between revisions of "JEF meeting Jul 27, 2015"
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*[https://halldweb1.jlab.org/wiki/index.php/JEF_meeting_Jun_8,_2015#Agenda Task list] updates | *[https://halldweb1.jlab.org/wiki/index.php/JEF_meeting_Jun_8,_2015#Agenda Task list] updates | ||
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| + | =Minutes= | ||
| + | Attendees: M. Kamel, B. Karki, D. Mack, A. Somov, S. Taylor, J. Stevens | ||
| + | |||
| + | * A. Somov: the 2 π0 background to the η→π0γγ channel needs to be understood better. Sascha suspects/fears that this is being underestimated in our PYTHIA background simulation. A theory colleague (S. Gevorkyan) is working on a 2π0 generator via σ(600) production or π+π-→π0π0 charge exchange. | ||
| + | * D. Mack: should try to understand how statistics from Spring run scale up to expected luminosity during regular production JEF/GlueX running. | ||
| + | * We discussed the need for magnetic field studies for determining the appropriate shielding for the PMTs for the insert crystals. A. Gasparian has tubes and dividers. Alternatively purchasing new tubes from Hamamatsu currently costs ~$375/tube (A.S.). T. Horn (Hall-C) has ordered 2x2 cm^2 lead tungstate crystals we may be able to use for a test. These dimensions are a little smaller than we anticipate we will need to accommodate the appropriate shielding. We will also need light guides because the mu-metal shielding should stick out beyond the face of the tube to be truly functional. | ||
Revision as of 16:30, 29 July 2015
Meeting time and location= 13:30 EST (JLab time) CC F326-327
=Connection instructions=We are using BlueJeans Video/Audio conferencing. Our meeting ID number is 370588741. Click "Expand" for more 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)
- If connecting via Web Browser: click this link (no passcode is needed):
- If connecting via Phone: Dial one of the following numbers and then enter the meeting ID above and hit "#" or "##"
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Agenda
- Task list updates
Minutes
Attendees: M. Kamel, B. Karki, D. Mack, A. Somov, S. Taylor, J. Stevens
- A. Somov: the 2 π0 background to the η→π0γγ channel needs to be understood better. Sascha suspects/fears that this is being underestimated in our PYTHIA background simulation. A theory colleague (S. Gevorkyan) is working on a 2π0 generator via σ(600) production or π+π-→π0π0 charge exchange.
- D. Mack: should try to understand how statistics from Spring run scale up to expected luminosity during regular production JEF/GlueX running.
- We discussed the need for magnetic field studies for determining the appropriate shielding for the PMTs for the insert crystals. A. Gasparian has tubes and dividers. Alternatively purchasing new tubes from Hamamatsu currently costs ~$375/tube (A.S.). T. Horn (Hall-C) has ordered 2x2 cm^2 lead tungstate crystals we may be able to use for a test. These dimensions are a little smaller than we anticipate we will need to accommodate the appropriate shielding. We will also need light guides because the mu-metal shielding should stick out beyond the face of the tube to be truly functional.
