Scintillators and sensors

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Presentation transcript:

Scintillators and sensors HCAL mainmeeting, 01 July 2008 Scintillators and sensors Roman Mizuk (ITEP, Moscow) Tile size tolerance MRS APD news Plans

Reminder: tile layout  Accuracy in alignment pins is principle of connection to PCB tile photo alignment pins matted edges (white) schematic view  Accuracy in alignment pins is adequate for firm connection to PCB. Slide1 Tolerance in tile size after matting of tile edges? (important for PCB design) 

Tolerance: pin diameter, tile thickness All sizes in mm. systematic uncertainty ~0.03mm Statistics of 100 tiles. Slide1  High accuracy in pin diameter and position.  ~100 μm increase of tile thickness at edges after matting.

Tolerance: tile size Statistics of 100 tiles. All sizes in mm. systematic uncertainty ~0.03mm Statistics of 100 tiles. Slide1  R.M.S. of tile size distribution ~50μm.  spread <200μm.

Tolerance: pin position All sizes in mm. systematic uncertainty ~0.03mm Statistics of 100 tiles. Slide1  R.M.S. of pin position distribution ~40μm.  spread <150μm.

Sensors: reminder NEW: MRS APD from CPTA  low x-talk (~3.6%) 556 cells (dynamic range) NEW: MRS APD from CPTA   Working point 15p.e. → 10p.e. for 30x30x3mm2 tile. MRS APD parameters at Np.e.=10 Noise frequency at 5 pixel threshold is below 100Hz. 4x105 300 MRS APD (transistor package) were tested. Slide1 300 MRS APD (rectangular package) ordered.

Status of MRS APD delivery, plans Delivery of rectangular type MRS APD expected end of May – delayed. h Currently producer is cutting extra height. Delivery of first 150 MRS APD promised this weak. Milling hole for sensor in tiles – wait for MRS APD delivery (tolerances). First 50-100 fully equipped tiles can be ready in ~3 weeks. Slide1 Order new casting form with changed layout of alignment pins and hole for sensor – wait for MRS APD delivery (tolerances).