9.12.2004I.Kreslo / LHEP BERN1 Status of scanning in Bern HW status SW status pi/mu separation ( PSI...

9.12.2004 I.Kreslo / LHEP BERN 1

Status of scanning in Bern

• HW status• SW status • pi/mu separation ( PSI 2004 )• vertex search (CERN 2004)


Hardware status

• 2 Microscopes are still working

• MC1310 problem (image flicker – temp. solved)

• Robot: plate taking problem and solutions -> see below

• Server : http://lheppc46.unibe.ch – on since 4 months

http://lheppc46.unibe.ch/


Robot performance

Plate taking problem is solved!!Change time 30s + FM scan time => ~90s

X position, microns

Y p

ositi

on, m

icro

ns

Limited by :- storage bank geometry - arm rigidity – negl.- encoder problems!!!


Software statusContributions to SySal developement

PlateChanger Object:

Manual robot control at three levels of detalization/safetyAutomated robot control from VertigoScanStage Homing



PlateChanger Object:

Manual robot control at three levels of detalization/safetyAutomated robot control from VertigoScanner3



FlexMap3 is under development

Tasks: automated FM scan - debuggingnew style FM with ID coding – in progress



BernScanServer:Tool to debug the complex Microscope + RobotControlled by TCP in a simple way, executes methods of VertigoScan which are executed by normal ScanServer

Task to do: measure relative plate positioning precision



VertigoScan3:Added slot for PlateChangerAdded method template for automated FM scanNo backward compatibility -> New Version 4?(Preliminary – auto FM scan is invoked indirectly:not a transparent solution)To be discussed…..


Scanning progressPi/mu PSI TB 2004

2 Bricks: 200 MeV pions and 120 Mev muons~100 cm-2

Mu Pi9+10 cm2 9 cm2

2100 mu + 2500 cosmics 2700 pi + 1900 cosmics

Log(P)Log(P)



cosmics



muons



pions



Muons de/dx Pions



Muons de/dx Cosmics



Pions de/dx Cosmics


Scanning progressVertex search CERN TB Nov 2004

CS dublet: 105 x 85mm scanned2603 tracks found

860 are within beam angular distribution (60mrad)

Brick: 20x20mm 32 emulsions are scanned and aligned with old style

FMs.



All

Passing through

Within beam

acceptance

Log(P)


Vertex search CERN TB Nov 2004CS dublet + brick are simulated (ORV3.06)

With 1000 pions @8GeV

Log(R), microns

Single events in the brick

Single events out of the brick

All events in the brick


Vertex search CERN TB Nov 2004CS dublet + brick are simulated (ORV3.06)

With 1000 pions @8GeV

Log(R), microns

Purity for single events

Efficiency

Purity for 1000 events



Alignement DCS-BRICK:Problem to set Z-distance…

Good alignment on beam tracks,But no reliable coinsidence for large angle particles.

Work is in progress….

To do: bulk scan with new FM and code recognition

9.12.2004I.Kreslo / LHEP BERN1 Status of scanning in Bern HW status SW status pi/mu separation ( PSI...

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