1. G.Sirri – INFN Bologna LNGS 2007-09-13 1/19 Status Report of the Bologna Scanning Lab Bologna Scanning Lab Last activities in the Bologna scanning lab  Scanback of the cosmic muon bricks (8199, 5914) extracted from the OPERA apparatus with the CSD scanned at LNGS  Test of the lateral X-ray mark finding with the ESS  Installation of the last DB-driven scanning infrastructure and new acquisition software modules  CERN 2007-July pion test beam analysis

2. G.Sirri – INFN Bologna LNGS 2007-09-13 2/19 CS-Brick Connection (8199, 5914)  Brick 8199 LNGS prediction: SX = -0.403 SY = 0.518 projected to -4800 µm from CS2 best candidate: ΔX = -95 µm ΔY = 57 µm ΔSX = 3 mrad ΔSY = 7 mrad PH = 29  Brick 5914 LNGS prediction: SX = 0.117 SY = 0.408 projected to -4800 µm from CS2 best candidate: ΔX = -52 µm ΔY = -89 µm ΔSX = 6 mrad ΔSY = 12 mrad PH = 24

3. G.Sirri – INFN Bologna LNGS 2007-09-13 3/19 Brick 8199 Scanback [old sw]  The scanback of this brick was presented in the last meeting (2007-07-18).  the track followed from pl 56 to pl18 (then the track comes out of the brick side)  basetracks found in 33 plates out of 39 (1 plate skipped because of mark on the wrong side)  all base tracks confirmed by visual inspection SX SY

4. G.Sirri – INFN Bologna LNGS 2007-09-13 4/19 Brick 8199 Scanback [new sw]  A new scanback of the same predicted track performed: OLDNEW old DB schemaDB schema 4.x sysal.net beta2 sysal.net 2.1 vertigoscan5vertigoscan5.3 smarttracker8smarttracker8.4 optical markslateral X-ray marks 3x1cm² calibr. zonesnone

5. G.Sirri – INFN Bologna LNGS 2007-09-13 5/19 BRICK 8199 Scanback [new sw] 27/30 SX SY

6. G.Sirri – INFN Bologna LNGS 2007-09-13 6/19 Brick 8199 Scanback [new sw] FPX-PPX (µm) FPY-PPY (µm) [old sw] [new sw] RMS 16 µm RMS 20 µm RMS 34 µm RMS 22 µm

7. G.Sirri – INFN Bologna LNGS 2007-09-13 7/19 Brick 8199 Scanback [new sw] FSX-PSX FSY-PSY [old sw] [new sw] RMS 12 mrad RMS 8 mrad RMS 12 mrad RMS 17 mrad FSX-PSX FSY-PSY

8. G.Sirri – INFN Bologna LNGS 2007-09-13 8/19 BRICK 5914 scanback [new sw] 7/13 Scanback paused at plate n.13 to check reason of inefficiency SX SY

9. G.Sirri – INFN Bologna LNGS 2007-09-13 9/19 BRICK 5914 offline check  1 cm2 x 10 plates scanned around the prediction.  offline scanback performed after volume fine alignment 5 basetracks and 3 microtracks found out of 10 plates Basetracks manually confirmed.  The track seems to have lower pulse with respect to the track of brick 8199. Under investigation… PLATE12345678910 PULSE20MT15MTX2820X MT

10. G.Sirri – INFN Bologna LNGS 2007-09-13 10/19 Lateral Mark Finding with ESS  All the scanback done with lateral X-ray marks and without intercalibration zones. The implementation of the lateral X-ray mark finding in the ESS scanning software presented in the last meeting (2007-07-18). Currently, the automatic search of the first mark has been tested and the manual setting of mark position implemented (but never used).  Comments: The mark finding module works smoothly. The mark finding reproducibility is very good (a few µm). The presence of a duplicated x-strip 1 mm far from the reference one caused some failures during tests. The software has been modified and will be tested as soon as possible

11. 11 Test Beam @ CERN July07 Scanning the data-set: F9-F16 (8 consecutive plates 2 weeks in the oven) Beam: pions @ 10GeV 7 beam directions with about 5 tracks/mm 2 each Scanning surface: 2x2 cm 2 on each plate x: -70000  -50000 y: 40000  60000 Total scanned area: 460 mm 2 PRELIMINARY

12. 12 Raw data: Equalization

13. 13 Raw data: ~ 4500-5000 cluster /layer ~ 350-400 micro-tracks /view (slope < 0.75 rad)

14. 14 Micro-tracks Bottom sideTop side

15. 15 Base Tracks-quality Peaks selection (5 sigma) Quality cut: chi 2 <0.5*PH-5 All linked base-tracks

16. 16 All bt after the quality cut chi 2 <0.5*PH-5 s.eW

17. 17 Pulse height vs theta

18. 18 Micro-track angular residuals vs theta Theta (rad)

19. G.Sirri – INFN Bologna LNGS 2007-09-13 19/19 Conclusions  Scanback and volume scan of the cosmic muon bricks extracted from the OPERA apparatus are in progress.  The scanning done with the the last DB-driven scanning infrastructure, the newer acquisition software modules and with lateral X-Ray mark.  The implementation of Lateral X-Ray mark finding in the ESS software is in progress. Test version are working smoothly.  CERN 2007-July pion test beam analysis in progress.

20. G.Sirri – INFN Bologna LNGS 2007-09-13 20/19

21. Spare slides

22. G.Sirri – INFN Bologna LNGS 2007-09-13 22/19 Lateral Mark Finding reproducibility X0 Y0 X1 Y1 #find home... 8199 1 0 0 125352.1 8226.9 125309.9 103026.2 8199 1 0 0 125353.9 8230.4 125311.1 103030.1 8199 1 0 0 125353.1 8225.3 125310.8 103029.7 8199 1 0 0 125353.1 8228.1 125311.1 103028.2 8199 1 0 0 125352.9 8228.2 125311.1 103028.0 8199 1 0 0 125353.5 8227.7 125310.8 103027.3 8199 1 0 0 125353.2 8224.6 125309.4 103029.0 8199 1 0 0 125352.8 8227.8 125310.6 103027.2 8199 1 0 0 125353.9 8227.8 125310.8 103027.0 8199 1 0 0 125352.8 8228.2 125309.3 103028.0 8199 1 0 0 125353.3 8226.0 125311.0 103025.6 8199 1 0 0 125353.1 8225.7 125310.1 103031.6 8199 1 0 0 125353.0 8227.7 125312.7 103027.0 8199 1 0 0 125353.0 8227.9 125310.2 103027.0 8199 1 0 0 125354.8 8228.1 125309.5 103027.6 8199 1 0 0 125353.5 8228.5 125311.3 103027.3 # find home... 8199 1 0 0 125354.5 8227.8 125312.2 103026.6 8199 1 0 0 125353.1 8226.4 125315.2 103026.6 8199 1 0 0 125353.2 8226.6 125315.3 103026.2 8199 1 0 0 125353.2 8227.8 125315.2 103027.6 8199 1 0 0 125353.3 8226.4 125315.3 103026.5 8199 1 0 0 125353.9 8224.3 125315.9 103027.6 8199 1 0 0 125354.9 8226.5 125312.3 103024.6 8199 1 0 0 125353.5 8228.1 125315.6 103026.9 8199 1 0 0 125353.0 8224.2 125314.9 103028.9

23. G.Sirri – INFN Bologna LNGS 2007-09-13 23/19 Lateral X-ray mark X

24. G.Sirri – INFN Bologna LNGS 2007-09-13 24/19 Mark recognition Not possible to be done:  No extra camera with low magnification optics are available Only a small amount of the lines can be scanned  The two lines are not always long enough to print a clear crossing point Not possible to scan only one FOV per mark The approach is:  Three pieces of each line are scanned and lines are obtained by a linear fit. The coordinates of intersection point are the mark coordinates. NO Intersection point

25. G.Sirri – INFN Bologna LNGS 2007-09-13 25/19 Mark finding procedure 1. Set the corner This is the procedure currently under test. 2. Scan this edge to find a first line segment 3. Scan further two line segment here 4. Repeat 2,3 for the 2nd line 5. Repeat 2,3,4 for the second mark 6. Evaluate the intersection points and evaluate the transformation

26. G.Sirri – INFN Bologna LNGS 2007-09-13 26/19 Scan Back: vacuum groove position  scan back of brick 8199 and brick 5914 with a predicted muon  This scanning has been done at Bologna using a vacuum system with a standard vacuum channel  To avoid interference with the image of the vacuum channel the emulsion plate was placed at the edge of the channel with lateral mark outside the vacuum area. Vacuum channel

27. G.Sirri – INFN Bologna LNGS 2007-09-13 27/19 The MARK is the intersection point between 1 and 2 1 2 WARNING: 3 can be confused with 2 34