Embed Size (px)
Citation preview
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
1
Scanning Report from Salerno
• Brick scanning overview
• Pending Events
• An Interesting Event
• Conclusions
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
2
Bricks
Delivered Scanning Started
NotConnected
LocatedPass/
Edge outDeadMaterial
Doing/Pending
CC 79 75 1 55 6 2 12*
NC 13 13 1 7 2 0 4**
Total 92 88 2 62 8 2 16
Brick Scanning Summary
More details in the next slides
* Brick 58076 not connected
** Brick 45758 not connected
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
3
CC Events
Muon on CS Located Pass\Edge Dead Material Doing/Pending Not Started
Yes 53 41 6 2 3 1
No 22 13 0 0 7 2
Black CS 4 1 0 0 2 1
Total 79 55 6 2 12 4
NC Events
NC Event Located Pass\Edge Doing/Pending Not Started
At least one SB track 12 7 2 3 0
Black CS 1 0 0 1 0
Total 13 7 2 4 0
Brick Scanning Summary
Not started: 1 damaged brick, 1 black CS, 2 CS-brick connection in progress
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
4
Pending/Doing
CC EventsType of study Number f bricks
SB of candidate found 2
Total Scan 2
Dedicated scanning for candidate search 5 (2 Black CS)
Under study 2*
3 / 4 requested 1
Total 12
* More details in next slides
NC EventsType of study Number f bricks
Dedicated scanning for candidate search 1 ( Black CS)
Total Scan OK, studying reconstruction 1
3 / 4 requested 2
Total 4
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
5
Scanning Report from Salerno
Some Problematic Events
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
6
Problematic Events – Brick 146712
Events 236738649 - Brick 146712 – Fog 8 grains/1000 m3
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
7
Candidate found on CS : 5 (no Muon found )
Candidate connected : 4
XZ View
‘Fake’ SB stop – Path 6
Missing segments reconstructed in Total Scan
(using microtracks!)
Restart with another SB to check the track is a passing
through
Tracks possibly correlated to event.
Total Scan performed, short tracks, checking reconstruction (wide
angle + short tracks, high background)
Problematic Events – Brick 146712
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
8
It seems that Path 6 crosses muon in upstream brick
We are scanning a 2 cm2 zone from plate 6
to plate 1
The scanning zone is chosen taking into
account the predicted position of the muon.
Problematic Events – Brick 146712
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
9
Problematic Events – Brick 94673
Events 238099347 - Brick 94673 – Fog 10 grains/1000 m3
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
10
Problematic Events – Brick 94673
Candidate Found on CS : 20 (one of which is flagged as possible muon).
Muon candidate is not found on PL 57-50
CS Muon candidate
We started with a shower search
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
11
Problematic Events – Brick 94673
Hint for shower in the CS candidates
Human-assisted TotalScan, plates 5733: 1 cm2 around shower axis,reconstruct every 10 plates, check for shower/vertex
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
12
Problematic Events – Brick 94673
Tilted XY
EM activity
Muon not found at vertex, but event looks like a high-energy one
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
13
Problematic Events – Brick 94673
Maybe secondary interaction found
More study needed to restart muon search
None of the tracks found can be the
muon
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
14
Scanning Report from Salerno
An Interesting Event
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
15
Interesting Events
Events 227114419 Brick 142310 – Fog 10 grains/1000 m3
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
16
Interesting Event – Brick 142310
Candidate Found on CS : 11 (no Muon found)
We started with a shower search
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
17
Interesting Event – Brick 142310
Hint for shower in the CS candidates
Human-assisted TotalScan, plates 5744: 1 cm2 around shower axis,reconstruct every 10 plates, check for shower/vertex
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
18
Interesting Event – Brick 142310
Tilted XY
Muon found at primary vertex
EM activity
XZ View
Muon
CS Candidates
Regina Rescigno, Cristiano Bozza – Salerno Emulsion Group – Apr 2009
19
Conclusions
Scanning restarted
Training 1 more scanner (young student)
Feedback/Publication restarting next week
Salerno data will be the “crash test dummies” to test schema upgrades in Central DB
Scanforth performed whenever applicable
Momentum estimation with likelihood-based algorithm (see last Phys. Coord.) performed whenever applicable (also re-evaluating old momentum measurements) – waiting for soft muon dataset for fine tuning
