ccd readout noise
TRANSCRIPT
Slide 1
Science Raft System Sensor ReviewSergio ResciasCCD Readout Noise
May 24 - 25, 2012 LSST Sensor Review May 24 - 25, 2012 LSST Sensor Review May 24 - 25, 2012#1OutlineReadout CircuitNoise SourcesWeighting Function ENC calculations and estimatesOther noise sources: Electromagnetic Interference
LSST Sensor Review May 24 - 25, 2012#2
CCD Readout on-chip preamplifier
LSST Sensor Review May 24 - 25, 2012#3
On-Chip Preamplifier Equivalent Circuit and Noise Sources Series Noisee2n= e2n,w +Af/f LSST Sensor Review May 24 - 25, 2012#4
+-Weighting Function for dual-slope integration LSST Sensor Review May 24 - 25, 2012#5ENC Calculation
Series NoiseParallel Noise
incl. current noiseNo current noise LSST Sensor Review May 24 - 25, 2012#6 CCD250 Noise from e2V Design report
e2V Empirical Formula LSST Sensor Review May 24 - 25, 2012#7
Best Fit to e2V Noise Plot
e2V formulaBest Fit LSST Sensor Review May 24 - 25, 2012#8Electromagnetic Interference (EMI)A document is being prepared detailing a set of guidelines and best practices still detailed, careful testing of sub-system as they are readied will be necessary to reduce EMIImportant for services:Slow sensorCryogenic linesPowerful motors for pumps, pointing, etcA structure needs to be put in place to assure compliance (grounding czar)
Example: Power LSST Sensor Review May 24 - 25, 2012#9End of Presentation LSST Sensor Review May 24 - 25, 2012#10