Difference between revisions of "BCAL Readout Segmentation Task group Meeting: Oct. 24, 2011"
| Line 43: | Line 43: | ||
* x-axis: | * x-axis: | ||
** bins 1-4 represent the number of neighboring readout cells that fired | ** bins 1-4 represent the number of neighboring readout cells that fired | ||
| − | ** bin 5 represents | + | ** bin 5 represents events where only the 4th cell (outermost) fired |
| + | ** bin 6 represents events when two non-adjacent cells fired | ||
| + | (A [[PID Readout Scheme Tests|page describing the plots]] has since been put up) | ||
| + | The plots are normalized to indicate neutron and photon probabilities for each topology. These could be used to form likelihoods of a shower being due to photon and not a neutron and vice versa. | ||
| + | |||
| + | Beni will add labels to the plots and generate some for particles at different angles. | ||
== BCAL energy/time Resolution Comparison to 2006 beam test == | == BCAL energy/time Resolution Comparison to 2006 beam test == | ||
| + | Dave showed some plots showing he is able to match the 2006 beam test results in both energy and time difference resolution using the special simulation tool he has developed. | ||
| + | |||
| + | It was suggested that dark hits be turned back on to see how that would affect the energy resolution. | ||
| + | |||
| + | The work done has been summarized in a brief [http://argus.phys.uregina.ca/gluex/DocDB/0018/001854/001/BCAL_BeamTestMC.pdf GlueX note]. | ||
== BCAL Reconstructed Time Resolution == | == BCAL Reconstructed Time Resolution == | ||
Revision as of 16:00, 25 October 2011
Contents
Meeting Info
Time:
- 1:30 JLab
- 11:30 Regina
Location:
- CC F326
Vid-con:
- ESNet 8542553
- EVO
- Phone connection:
- +1-866-740-1260 : US+Canada
- +1-303-248-0285 : International
- then enter participant code: 3421244# (remember the "#").
- or www.readytalk.com (and code without the #)
Agenda
Review action items from previous meeting
- MIA
New Agenda items
- Neutron/photon discrimination (Beni)
- BCAL energy/time Resolution Comparison to 2006 beam test (David L.)
- BCAL Reconstructed Time Resolution (Paul M.)
- Discussion on argument sharpening (All)
Minutes
Participants
David L., Paul M., Zisis P, George L., Curtis M., Matt S., Beni Z., Eugene C (partial)
Neutron/photon discrimination
Beni showed some plots from simulated data indicating the discriminating power of the BCAL between neutrons and photons. The plots were uploaded recently and missing some labels:
- Red = neutron
- Black = photon
- x-axis:
- bins 1-4 represent the number of neighboring readout cells that fired
- bin 5 represents events where only the 4th cell (outermost) fired
- bin 6 represents events when two non-adjacent cells fired
(A page describing the plots has since been put up)
The plots are normalized to indicate neutron and photon probabilities for each topology. These could be used to form likelihoods of a shower being due to photon and not a neutron and vice versa.
Beni will add labels to the plots and generate some for particles at different angles.
BCAL energy/time Resolution Comparison to 2006 beam test
Dave showed some plots showing he is able to match the 2006 beam test results in both energy and time difference resolution using the special simulation tool he has developed.
It was suggested that dark hits be turned back on to see how that would affect the energy resolution.
The work done has been summarized in a brief GlueX note.
BCAL Reconstructed Time Resolution
Action Items
- Look at π(1600) events with higher proton mass to see if better proton/pion separation exists for the 1234 than 334 scheme. (Paul)
- Add more labels and more angles to plots showing neutron/photon discriminating power (Beni)
- Resolve issues with extracting proton timing resolutions from existing MC (David)
- Write ITYS section of minutes (George)
