1096805

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General Informations (FILL ONLY THE MISSING PART - DO NOT ADD HERE TEXT)

- Brick: 1096805
- Event: 227779957
- Type: Muon

- Person: Jonas
- Mic: 5
- camera exposure time: 1/value
- light level: 27886
- cutoff 1: 1500
- cutoff 2: 1300

- Analysis Follower of the OPERA Experiment
- Event Viewer - detector
- Event Viewer - vertex

Muon Informations:
Momentum: 26.415 GeV/c
TX: -0.037
TY:  0.101

STATUS: Event not yet located - change Mic?

• searched pred in pl 57, 56, 55 -> nothing found
• made volume scan around predicted muon and converging other track -> found one matching, displaced by 2mm.
• no other tracks in totalscan volume match any tracks
• totalscan tracks have lot of holes (low efficiency on microscope?)
• at the beginning there where problem with the alignment -> solved by defining different parameters in fullalignment
• the stage was not stable (went to different positions) -> solved by changing filter configuration from 3.2 MHz -> 12.8 MHz!
• checked all track position with totalscan volume (7000x7000) - NOTHING FOUND all other tracks are not there.
• NEXT: go to other microscope with other person??

VERTEX INFOS

no vertex found

Prediction

5 predictions in pl057:

      4   103106.23    23129.68   0.3595   0.1085 0
      5    62790.68    30292.43   0.1627   0.3306 0
      7    94864.62    46633.95   0.4706  -0.2661 0
      9    89503.20    50542.04  -0.0480   0.1028 0 MUON
     17    88836.15    40476.98   0.2699  -0.5553 0

NOTHING MANUALLY CONFIRMED

Totalscan

Start total scan around the predicted area

Run number 1000, IDPATH 99

Loogbook

Start: 2008-10-01, 16:30

Start operation... 2 prediction found in plate 57 (muon plus one other)

alignment problem between plate 57 and 56!!! triple peak ... see problems ... of course, prediction in plate 56 not found (only mt found)

reboot computer, make new flat field, start again from plate 57.

Calibration of 57-56 gives now one peak, 12 over 0.

scan pred in 57.. only mt found on muon... scan again!

START AGAIN... bigger intercalibration area (5000 instead of 3000)

NO PREDICITION confirmed in plate 57-55...

calculate prediciton between track 7 and 9 (muon)

IP: 76.7253 VTX: 89981.5 VTY:  49438.9 VTZ: -10425.6
    -> 8 plates... vertex expected around 50 
- CS view
- expected vertex

mean X: 92183    dX: 2680
mean Y: 48586    dY: 1954

Make file b096805.0.1.100.stopping_points.txt with artificial prediction inside
99 92183.0 48587.0 0.0 0.0 50

Start volume scan around this area from plate 57 to 40

one 2-prong with a muon candidate: 2_prong candidate

select track from the fedra display (eID)
open root with linked_tracks.root
tracks->Scan("s.eX:s.eY:s.eZ:s.eTX:s.eTY:s.eVid", "trid==203")
***********************************************************************************************
*    Row   * Instance *      s.eX *      s.eY *      s.eZ *     s.eTX *     s.eTY *    s.eVid *
***********************************************************************************************
*      203 *        0 * 91732.734 * 45889.710 *    -19836 * -0.053277 * 0.1306622 *     42099 *
*      203 *        1 * 91595.539 * 46232.335 *    -17199 * -0.052222 * 0.1249403 *     12718 *
*      203 *        2 * 91403.703 * 46755.453 *    -13229 * -0.054286 * 0.1324407 *     44099 *
*      203 *        3 * 91245.351 * 47111.535 *    -10568 * -0.048070 * 0.1348208 *     14635 *
*      203 *        4 *  91012.25 * 47634.402 *     -6634 * -0.054082 * 0.1310496 *     47099 *
*      203 *        5 * 90765.093 *  48145.75 *     -2654 * -0.057746 * 0.1287405 *     16514 *
*      203 *        6 * 90659.468 * 48305.199 *     -1347 * -0.069330 * 0.1281432 *     49099 *
*      203 *        7 *           *           *           *           *           *     13311 *
*      203 *        8 *           *           *           *           *           *     52099 *
*      203 *        9 *           *           *           *           *           *     17322 *
*      203 *       10 *           *           *           *           *           *     55099 *
*      203 *       11 *           *           *           *           *           *     30548 *
*      203 *       12 *           *           *           *           *           *     56099 *
*      203 *       13 *           *           *           *           *           *     29401 *
***********************************************************************************************
last entry was in plate 56... s.eID=29401
open p056/96805.56.99.1000.cp.root
couples->Scan("s.eX:s.eY:s.eTX:s.eTY", "s.eID==29401")
************************************************************
*    Row   *      s.eX *      s.eY *     s.eTX *     s.eTY *
************************************************************
*    29401 * 91041.062 * 48359.355 * -0.069874 * 0.1278475 * confirmed!
************************************************************
here what was predicted from CS to plate 57:
 pred pl57 * 89503.20  * 50542.04  * -0.0480   * 0.1028
 res       * 1538      * -2183     * -0.021    * 0.025

in pl57?   * 91132     * 48192     * -0.069    * 0.128

TRACK TOO FAR AWAY FROM CS PREDICTION

Track is too far away to be the muon (2mm/1.5mm displacement).

Check displacement on other tracks. Totalscan volume around prediction from plate 57 for 4 other tracks (7000x7000). For none of the prediction there was a track found withing 50mrad from the prediction. NOTHING FOUND!!!

Try later on a different microscope by a different person?

End:

Problems and Infos

Triple peak in the alignment of plate 57 to 56.

File:B096805 alignment p57 p56.png

• Stage problem: the stage does not move to the same postion (displaced by about 64 microns) - changed max speed in stage configuration from 700000 to 350000.

Alignment Problems

• parameters taken from the AFF folder
• plots produced with scanlib.C
• same alignment procedure and parameters for both volumes (same size, different place)
• old means before corrections (as a reference how it was before)

plates	IC	TS
57-56	0.999987 -0.005086 0.005086 0.999987 832.751282 -409.818634	0.999991 -0.004249 0.004249 0.999991 587.657654 -330.613678
	0.996390 -0.006472 0.004392 0.998986 1202.876465 -309.898041 (old)	0.999992 -0.004021 0.004021 0.999992 574.719116 -309.261810 (old)
57-56	File:B96805 IC 57 56.gif	File:B96805 TS 57 56.gif
56-55	0.999967 0.008124 -0.008124 0.999967 -1097.445312 827.837402	0.999981 0.006173 -0.006173 0.999981 -904.258789 646.127258
	0.997813 0.009178 -0.006863 1.000450 -948.653992 698.393555 (old)	0.999981 0.006173 -0.006173 0.999981 -904.258789 646.127258 (old)
56-55	File:B96805 IC 56 55.gif	File:B96805 TS 56 55.gif
55-54	0.999999 0.001466 -0.001466 0.999999 -182.117294 135.997711	1.000000 0.000641 -0.000641 1.000000 -158.483109 66.542511
	0.997775 0.001160 -0.001697 1.000132 24.378750 151.149734 (old)	1.000000 0.000642 -0.000642 1.000000 -158.504791 66.570427 (old)
55-54	File:B96805 IC 55 54.gif	File:B96805 TS 55 54.gif
54-53	1.000000 0.000728 -0.000728 1.000000 -165.278900 77.266022	1.000000 0.000781 -0.000781 1.000000 -43.713165 86.983582
54-53	File:B96805 IC 54 53.gif	File:B96805 TS 54 53.gif
53-52	1.000000 -0.000605 0.000605 1.000000 84.582565 -43.117924	1.000000 -0.000443 0.000443 1.000000 -84.135429 -33.716534
53-52	File:B96805 IC 53 52.gif	File:B96805 TS 53 52.gif