Difference between revisions of "MINIDC MinVoltageStudy"
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==Sense wire 2== | ==Sense wire 2== | ||
| − | Preamplifier voltage was set to 5.9 Volts. We saw a lot of noise ( 40 mV peak to peak) when increasing the preamp voltage from 2.2 V to 5.7 Volts. After 5.7 volts the noise when back to | + | Preamplifier voltage was set to 5.9 Volts. We saw a lot of noise ( 40 mV peak to peak) when increasing the preamp voltage from 2.2 V to 5.7 Volts. After 5.7 volts the noise when back to a noise level of 8 mV peak to peak which is smaller than the 16 mV peak to peak noise observed 3 days ago on the sense wire (capacitor side)before the preamp. |
The output signals for 1700 Volts were consistently shaped like what is shown inthe scope image below. Whereas the output at 1800 Volts seems to have more noise when triggered at -100 mV. | The output signals for 1700 Volts were consistently shaped like what is shown inthe scope image below. Whereas the output at 1800 Volts seems to have more noise when triggered at -100 mV. | ||
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|1700 || -850|| [[Image:SenseWire2_1700V_Cosmic_10-12-07.jpg | 200 px]] | |1700 || -850|| [[Image:SenseWire2_1700V_Cosmic_10-12-07.jpg | 200 px]] | ||
|}<br> | |}<br> | ||
| + | |||
| + | [http://www.iac.isu.edu/mediawiki/index.php/Mini-prototype#Inspecting_Detector_Signals Back to Mini Prototype page] | ||
Revision as of 18:13, 12 October 2007
Operating Voltage Study
We will lower the operating voltage and take scope pictures to determine the operating point for the mini chamber.
SenseWire 1
Sense wire 2
Preamplifier voltage was set to 5.9 Volts. We saw a lot of noise ( 40 mV peak to peak) when increasing the preamp voltage from 2.2 V to 5.7 Volts. After 5.7 volts the noise when back to a noise level of 8 mV peak to peak which is smaller than the 16 mV peak to peak noise observed 3 days ago on the sense wire (capacitor side)before the preamp.
The output signals for 1700 Volts were consistently shaped like what is shown inthe scope image below. Whereas the output at 1800 Volts seems to have more noise when triggered at -100 mV.
| Sense Wire HV (Volts) | Field Wire HV (Volts) | Scope Image |
| 1700 | -850 | 
|