European Scanning System: status report

DRY Fill factor 92.4 ± 1.6 % DB-driven Scan-back and Total Scan in Bari OIL Fill factor 93.1 ± 1.2 % Brick #8, CERN, Nov PS T7 beam :  GeV/c spread over  9×9 cm 2 Cosmic rays: 6 hours (  1 track/mm 2 / ≤400mrad)

10GeV pion vertex brick with ~1000 pions (CERN, Nov. 04) Predictions are made to pl.56 in 4x4cm zone 294 tracks : 2 times scan-forth is performed with acceptance 70 microns and 40 mrad 2 consecutive holes are allowed ~ 70 stopping points found ~ 60 selected between plates 2 and 56 for vertex confirmation by Fedra Volume 5x5mm, 5 plates up and 4 down the stop Scan-forth and vertex location with dry objective and DB-driven SySal in Bern

Event statistics Pass 1 Total unique 61 Passing through 18 Confirmed stops 11 Scattered 13 2 branch vertex 12 3 branch vertex 5 >3 branch vertex 2 pl number of fakes 2 13 !! Excluding plate 2: total 48, fake 5: 10% ± 2% Pass 2 Total unique 55 Passing through 12 Confirmed stops 10 Scattered 13 2 branch vertex 12 3 branch vertex 6 >3 branch vertex 2 pl number of fakes: Excluding plate 2: total 46 fake 3: 7% ± 2%

DB-driven scanning in Bologna Brick #7 exposed at Cern Nov 2004 (~ GeV) Cosmic rays: 6 hours SB with 2 different oil microscopes: one in a “standard” configuration (MIC2), one with fine-tuned scanning parameters (MIC3), same performances Total-Scan around stopping points of MIC3 to validate SB results 5 plates upstream and 3 plates downstream, 5 x 5 mm 2 scanning area around each stop FEDRA vertex reconstruction algorithm applied reading base-tracks from DB General scan of 4x4 cm 2 on 10 consecutive plates. 325 volume-tracks with npl = 10 and θ < 400 rad as a trigger (starting from plate #1)

scanning efficiency (passing through tracks): ε > 90% for most of the plates MIC3 SB summary : 251 Pass-through tracks 74 Stopping tracks (23 stopped in the first 10 plates) RED MIC3 BLUE MIC2 MIC2 SB summary : 254 Pass-through tracks 71 Stopping tracks (23 stopped in the first 10 plates) 325 Followed tracks 251 Passing (77,2%) 74 Stopping (22,8%) 23 Stopping before Plate Stopping 10>Pl<53 13 Passing (23.5%) 6 because inefficiency 7 because BK 38 Possible Interactions 4 “strange” events 34 real interactions

–1 microscope installed (except vacuum system and Nikon optics alignment) –1 microscope under installation Microscopes in LNF Temperature and humidity OK First emulsion image from PEANUT brick

LNGS

Status of Lyon Scanning Lab activities DB-Scanback and Total Scan (oil/dry) Installation of Bern Plate Changer DB-Driven Scanback on brick #4 DB-Driven Scanback on brick #4 (CERN Nov. 04) 288 tracks were followed (CS1 – CS2 – PL1) Scanning parameters : Slope Tolerance = *slope Pos. Tolerance = (70 + 6*slope) microns Max trials = 2 Scanned area for trigger tracks ~25 cm2

Scan-back oil Scan-back dry 71 events stop plate > 4 and stop plate < events stop plate > 4 and stop plate < 53 Pl 29 Volume analysis is in progress The Plate Changer works successfully in DB driven mode

NAPOLI

Plate changer installation completed in April Running test OK Microscope ready for data-taking Scanning status in Neuchâtel external Oracle Server Samba Server (CPU Server) DNS Firewall Batch Server File Server Client Oracle Batch Server File Server Client Oracle Gbit Switch Linux Windows XP LTO Tape Computing Infrastructure

Status of the activities in Padova The Scanning station is now being set-up All the microscope components have arrived in PD. A proper location has been the LNL (Legnaro National Laboratories, just outside of Padova) inside the “Sala delle Alte Energie” building. ● The ODYSSEY+FLEX boards & relative software have been installed and first basic functionality checks performed; SySal & Oracle DB have also been installed

SALERNO