Difference between revisions of "ASIC design optimizations"
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== Planned tests == | == Planned tests == | ||
| − | * High Voltage plateau | + | * High Voltage plateau === done |
Gas: Ar-CO2 87%-13% gas mixture. | Gas: Ar-CO2 87%-13% gas mixture. | ||
Setup: the signal after the shaper was inverted and fed to a discriminator. The HV was changed and the signals above threshold where counted (normalized to 100s measure time). | Setup: the signal after the shaper was inverted and fed to a discriminator. The HV was changed and the signals above threshold where counted (normalized to 100s measure time). | ||
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[[Image:hvplateau_ch15.jpg|thumb|none|400px|HV-curve,the count is normalized to 100s measurements.]] | [[Image:hvplateau_ch15.jpg|thumb|none|400px|HV-curve,the count is normalized to 100s measurements.]] | ||
| + | Below galleries of pulses are shown for different HV: | ||
| + | ** 1600 V | ||
Revision as of 15:47, 30 April 2008
Planned tests
- High Voltage plateau === done
Gas: Ar-CO2 87%-13% gas mixture. Setup: the signal after the shaper was inverted and fed to a discriminator. The HV was changed and the signals above threshold where counted (normalized to 100s measure time). The result:
Below galleries of pulses are shown for different HV:
- 1600 V
- (absolute) Gas gain as a function of High Voltage
Source measurement using Sr-90 (e-) or 55-Fe (X-rays) (if we have it) / or using cosmic rays? -- Estimated time: 1 day -- if we have a good source
- Dynamic range + amplitude distributions
1 week measure with horizontal chamber + 1 week measure with tilted chamber. For amplitude distributions we need to have modified shapers. -- Estimated time: 2 weeks
- Collection of gallery of pulses
I found 4 pulse galleries, measured directly after the pre-amplifier made by Gerard when he was here, they are shown below:
