Difference between revisions of "Pion Meeting January 29 2021 11AM ET"
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Back to [[Main_Page|Main Page]] >> [[Pion_Meetings | Pion Meetings]] | Back to [[Main_Page|Main Page]] >> [[Pion_Meetings | Pion Meetings]] | ||
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| + | * Bluejeans link: [https://bluejeans.com/420107252 420 107 252] | ||
| + | * Dial-in: [tel:408-740-7256p420107252# 408-740-7256] (US), [tel:888-240-2560p420107252# 888-240-2560] (US Toll Free), [tel:408-317-9253p420107252# 408-317-9253] (Alternate number) | ||
=Agenda= | =Agenda= | ||
| − | # Lucite detector shielding from downstream and at inner radius (Elham) | + | # Lucite detector shielding from downstream and at inner radius (Elham) [https://moller.jlab.org/cgi-bin/DocDB/private/ShowDocument?docid=687] |
=Attendance= | =Attendance= | ||
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| + | Elham, Wouter, David, Jim | ||
=Minutes= | =Minutes= | ||
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| + | * Lucite detector shielding from downstream and at inner radius | ||
| + | ** 3 geometries: "original" with lucite far downstream of Pb donut, "new" with thinner/shorter lucite just downstream of Pb donut, "shielded new" with additional shielding | ||
| + | ** "new" geometry avoids showermax secondaries into lucite in other sector | ||
| + | ** However, still only 10% of light is from Moller electron generator, while there are still 100 times more pions | ||
| + | ** Possible ideas are both low energy electrons and the optical geometry selecting for the backgrounds over forward going pions | ||
| + | ** "shielded new" removes low energy particles that are hitting the lucite when moving backwards | ||
| + | ** Q: What happens if we change the air to vacuum again? How much does scattering of air direct secondaries from the showermax back into the top of lucite detector? | ||
| + | ** Q: How many primary electrons still reach the lucite? Is there punchthrough? | ||
| + | ** Q: Can we replace the donut by a wall with a hole in simulation? | ||
| + | ** Q: Canonical thickness of downstream inner radial lead shielding would be 4". Can this be increased? | ||
| + | ** Q: Diffuse reflection on the lucite surfaces? Fermilab approach. | ||
Latest revision as of 16:58, 29 January 2021
Back to Main Page >> Pion Meetings
- Bluejeans link: 420 107 252
- Dial-in: 408-740-7256 (US), 888-240-2560 (US Toll Free), 408-317-9253 (Alternate number)
Agenda
- Lucite detector shielding from downstream and at inner radius (Elham) [1]
Attendance
Elham, Wouter, David, Jim
Minutes
- Lucite detector shielding from downstream and at inner radius
- 3 geometries: "original" with lucite far downstream of Pb donut, "new" with thinner/shorter lucite just downstream of Pb donut, "shielded new" with additional shielding
- "new" geometry avoids showermax secondaries into lucite in other sector
- However, still only 10% of light is from Moller electron generator, while there are still 100 times more pions
- Possible ideas are both low energy electrons and the optical geometry selecting for the backgrounds over forward going pions
- "shielded new" removes low energy particles that are hitting the lucite when moving backwards
- Q: What happens if we change the air to vacuum again? How much does scattering of air direct secondaries from the showermax back into the top of lucite detector?
- Q: How many primary electrons still reach the lucite? Is there punchthrough?
- Q: Can we replace the donut by a wall with a hole in simulation?
- Q: Canonical thickness of downstream inner radial lead shielding would be 4". Can this be increased?
- Q: Diffuse reflection on the lucite surfaces? Fermilab approach.
