Event location and decay search in Switzerland

Swiss group

Run Received

Started Located in brick

Dead mat.

Passing through

DS

2008 CCNC

16539

16539

13028

164

00

13028

2009 CCNC

35489

35489

25163

295

30

25163

2010 CCNC

359113

327113

20979

113

252

20175

2011 CCNC

9565

7363

5441

23

12

4839

Total 1391 events have been scanned.

Global status (2008+2009+2010+2011)

Normal bricks NO_COSMIC / BLACK_CS

Run Received

Started Located in brick

Dead mat.

Passing through

DS

2008 CCNC

2715

2715

154

21

00

154

2009 CCNC

2242

2242

68

42

00

68

2010 CCNC

2132

1831

83

01

13

83

2011 CCNC

77

67

30

00

20

30

Not started: High priority 31 (CC 28, NC 3)

Scanning coordination and shift organization in Bern (1)

3

• Location speed in Jun-Aug was not stable– Manpower for scanning

• 3-4 physicists are reduced from scanning shifts.

– 4 microscopes devoted to OPERA– July was vacation season in Switzerland– Main manpower was used for the test exposure at CERN in Aug

(~1month)

• Thanks to Çağın Güneş (Ankara) for her contribution from July• A new guy (non physicist) started to help data taking from 2weeks ago

• New strategy– Prediction scan base -> volume scan base (location quality does not change)– Reduce human needed work even increasing scanning time

– Reduce dead time of 4microscopes with plate changer (night, weekend) may increase location speed factor ??

– Now trying to establish new way..

Scanning coordination and shift organization in Bern (2)

CS prediction

Volume scan

Manual confirmation

• One of bottle neck: problems on lateral marks for the already delivered bricks (some lines too near to edge or too thin)– Problems were investigated by BH people.– Please monitor regularly at GS.

• Examples

Scanning coordination and shift organization in Bern (3)

• Remote monitor for night and weekend

Scanning coordination and shift organization in Bern (4)

4 microscopes can be remotely monitored

by a person.

Mark measurement can be helped manually

by remote.

An example automatic measurement failed (horizontal line near to edge and some scratches)

Event10189040923 CC?

Possible gamma off vertex?(event10189040923)

• A track with IP 338m to 1ry.– p ~1GeV– possibility not excluded.

• Under checking– Some other tracks not confirmed in vertex plate.– Efficiency is bad..

1mm

Summary and prospect

• Location speed in Jun-Aug was not stable with manpower problem and lateral mark problem.

• Now trying to increase location speed by reducing dead time of microscopes.

BACKUP

Status 2010, Flag>=0

CC NC ALL

ECC arrived 268 112 380

ECC scan 263 112 375

ECC connected

227 97 324

Dead material

10 3 13

Passing through

20 2 22

Located 158 78 236

Bern

JP

Status 2011, Flag>=0

CC NC ALL

ECC arrived 95 65 160

ECC scan 73 63 136

ECC connected

61 55 116

Dead material

2 3 5

Passing through

3 2 5

Located 54 41 95

Bern

JP

2010-2012 priority eventlocation status

JP

Bern

Located

2010 CC 158

2010 NC 78

2011 CC 54

2011 NC 41

2012 CC 0

2012 NC 0

Status 2011, 0mu prob>50% 1st brick

JP

Bern

<=May31 <=Jun30 <=Jul31 All

ECC arrived

23 29 34 42

ECC scan 23 28 33 41

ECC connected

20 25 28 34

Dead material

1 2 2 2

Passing through

0 0 0 0

Located 13 17 19 23