1. Commissioning and Calibration Strategies for Micromegas Vertex Tracker
Before commissioning:
Quality assurance and detectors identification
Calibration without beam
System check-out
Commissioning without and with beam
October
CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur

2. 1. Quality assurance and Detector identification
For each individual detector (18+ spare detectors for Barrel and 6+spare for Forward):
Test 1 : Verification of dimensions (flat and curved for Barrel)
Optics lab
Dimension and cylindricity
measurements on dedicated bench lab
Test 2 : Gain and energy resolution measurements over the whole detector area
Measurements of gain and energy
resolution using Fe source
October
CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur

3. CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur
Quality assurance
Test 3 : Efficiency and spatial resolution measurements with cosmic run
Cosmic bench
3 tiles measured
simultaneously (~10 days)
Establishing an ID form for each unit
October
CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur

4. Alignement procedure (S. Aune)
In order to know the position of each active area (strips) once in the magnet, metrology will be done during integration
Each detector will have several printed copper cross-hair
Cross hair are made during the strip printing.
Each detector will have a glued mechanical support for surveyor needs
Distance between cross hair and support measured by optical means (+/- 5 µm) on each tile
During barrel tile integration in its structure each tile position will be measured versus supports at the rear of the barrel structure
Optical measurement between tiles and barrel structure (+/- 5 µm)
During barrel structure integration with the main support tube measurements will be done with support on the support tube.
Optical measurement between barrel structure and rear part of the tube (+/- 5 µm)
When the support tube will be inserted in the magnet the position measurement at the rear of the tube will give strip position (better than 0,1 mm)
October
CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur

5. CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur
Calibration
After integration of the whole barrel and forward on the final mechanical structure:
Test 4 : Survey of Barrel and Forward detectors
Test 5 : Cosmic run with full Barrel detector in nominal configuration (with full electronics chain)
Test 6 : Cosmic run with full Forward detector in horizontal configuration (with full electronics chain)
Determination of gain, efficiency, spatial resolution
Parameters to adjust : HV of mesh and drift electrodes for each detector, electronics.
Slow control will be adapted to CLAS12 general framework.
After integration of Micromegas with SVT, full check-out of MSVT:
Test 7 : Alignment and Survey of MM versus SVT
Test 8 : Cosmic rays with both tracking systems, cross-talk, noise measurements, temperature measurements
After integration of full Central Detector :
Test 9 : Cosmic rays with all systems on (Magnet on/off)
October
CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur

6. CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur
System Checkout
1. Checkout of Front-End electronics
2. Checkout of the High-Voltage system and distribution
3. Checkout of the Low-Voltage System
4. Checkout of DAQ and Trigger
5. Checkout of gas system
6. Checkout of safety system (interlock LV/HV/cooling/gas/magnet quench)
7. Make sure 4th layer of SVT is removed before installing MVT ;)
October
CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur

7. Commissioning without beam
1. Special runs
1. Pedestal run
2. DREAM diagnostics run
2. Cosmic ray runs
1. Cosmic run w/ solenoid off
2. Cosmic run w/ 0.5*Bmax
3. Cosmic run w/ Bmax
October
CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur

8. Commissioning with beam
Geometry/tracking run : multifoil thin targets, maybe lower luminosity
(2-3 h/run)
2. Geometry/tracking run w/ B=0 : multifoil thin target, lower luminosity
Check resolution, shifts towards simulations, momentum reconstruction
3. Gain adjustment run : regular data taking, but HV adjustments during the run
4. Elastic run, check of the full reconstruction with respect to the field value
October
CalCom - S. Aune- J. Ball - F.Sabatié - S. Procureur