Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Scanning Report from Salerno

• Brick scanning overview

• Event gallery

• General statistics

• Conclusions

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Brick scanning summary

NC CC

Bricks delivered 12 62

Scanning started 12 61

CS-brick connected 11* 60

Vertex found + SF + Feedback 7 45

Passing-through 1** 2

Side edge-out 1 1

Vertex in dead material 0 2

Under study 2 4

Pending (waiting for 3/4 or TT connection) 1 7

Not started yet 0 1

* Brick 5969 is a NC with black CS. 1 track found, but passes through the brick.** Brick 134936 has a secondary interaction of a NC event; parent track followed to plate 1

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Event gallery

Event gallery

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Event gallery

Event 224778801 Brick 150194 (fog ≃14grs/1000m3)

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Event gallery

Event 224778801 Brick 150194 (fog ≃14grs/1000m3)

Hint for shower in the CS candidates

Human-assisted TotalScan, plates 5722: 1 cm2 around shower axis,reconstruct every 10 plates, check for shower/vertex

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Event gallery

Event 224778801 Brick 150194 (fog ≃14grs/1000m3)

Vertex found between plates 35 and 36

XY XZ

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Event gallery

Event 224778801 Brick 150194 (fog ≃14grs/1000m3)

Vertex found between plates 35 and 36

Tilted XY

Two showers found ( is likely)

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Event gallery

Event 237882171 Brick 134936 – NC, passing through with secondary

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Event gallery

Event 237882171 Brick 134936 – NC, passing through with secondary

3-prong vertex with primary

Another passing-through

The twopassing-through tracks do not converge

(seen on XZ)

YZ

XZ

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Event gallery

Event 234925885 Brick 143527

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Event gallery

Event 234925885 Brick 143527

XY

YZ

Close-up

Track stoppingin the volumedownstreamof the vertex,not seen on CS

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Event gallery

Event 234925885 Brick 143527

Tilted view

Track stoppingin the volumedownstreamof the vertex,not seen on CSIP = 80.5 mZ = 1900 m

CS check needed

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

General Statistics

General Statistics

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

General Statistics: Vertex features

Charged multiplicity of CC primary vertices Charged multiplicity of NC primary vertices

Average multiplicity: 3.6QE-like: 9/44 = 20%

Average multiplicity: 3.6

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

General Statistics: Vertex features

Muon impact parameter Hadron impact parameter

Average IP: 2.8 m Average IP: 12.0 m

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

General Statistics: Vertex features

Azimuthal angle in frame between muon and hadrons

, degrees

h

Clear anti-correlation between muon and hadron directions

Regina Rescigno, Giustino D’Amato, Cristiano Bozza – Salerno Emulsion Group – Jan 2009

Conclusions

Scanning stopped for Christmas holidays, restarted smoothly

Event statistics increasing steadily

Running parameters stable since several months(No brick-by-brick tuning)