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MimoStar2 tests @ Berkeley

MimoStar2 tests @ Berkeley. Outline. Test setups and test priorities Discovery of dead pixels in the middle of the frame Increased noise (calibration results) Chips selected for the telescope prototype. Test setups and test priorities. Test setups Mezzanine card

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MimoStar2 tests @ Berkeley

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  1. MimoStar2 tests @ Berkeley

  2. Outline • Test setups and test priorities • Discovery of dead pixels in the middle of the frame • Increased noise (calibration results) • Chips selected for the telescope prototype

  3. Test setups and test priorities • Test setups • Mezzanine card • compatible with existing DAQ system • Flex cable setup • dedicated to the telescope prototype • driven by the HFT detector design requirements • readout system had to be developed first • Priorities • Build telescope readout system • Build telescope with 3 MimoStar2 chips … • Debug noisy Mother Board-Mezzanine Card System

  4. Strange pixels in the middle of the frame Chip 1 –Flex cable Chip 2 –Flex cable (internal Gain = 5) Chip 3 –Flex cable Chip 2 –Flex cable Assumption: some sort of distortions (since no dead pixels had been observed before). The problem seemed to be more serious/more fundamental than the high noise observed…

  5. Lab verification • Fe55 calibrations IPHC – results from Strasbourg Mezz. Full – chip bonded on a mezzanine card Mezz. Part – chip bonded on a mezzanine card with part of the bonds (like for a flex cable) Flex1 – only on flex cable in the hft system Flex2 – two chips in parallel in the hft system • The noise doesn’t come from the DAQ system (~1 ADC)

  6. Chips for the telescope ONLY one chip has ONLY two dead pixels

  7. Calibration Results • Fe55 calibrations after assembling the telescope head

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