Difference between revisions of "MiniPrototype SinglesCosmicRuns 2008"
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'''OUTPUTS FROM DISCRIMINATOR'''<br> | '''OUTPUTS FROM DISCRIMINATOR'''<br> | ||
| + | ;;Discriminator Threshold=365MV | ||
[[Image:plastika_output_wire_3_amplifier_discriminator_HV_on_1800V_30-04-2008_1.png|300px]]<br> | [[Image:plastika_output_wire_3_amplifier_discriminator_HV_on_1800V_30-04-2008_1.png|300px]]<br> | ||
[http://www.iac.isu.edu/mediawiki/index.php/Mini-prototype#Cosmic_runs Go Back] | [http://www.iac.isu.edu/mediawiki/index.php/Mini-prototype#Cosmic_runs Go Back] | ||
Revision as of 05:46, 1 May 2008
Goal
Use singles Cosmic events to measure rate differences between Metalica and Plastica
Apparatus
- Plastica and Metalica are stacked on top of each other. High Voltage and ionization gas are connected in parallel.
- A discriminator is connector to the amplified output (an on board preamp and the VPI Post amp) of sense wire 4.
- The discriminator output is connected to a VME scaler.
Proposed Tests
- Measure the singles rate as a function of DC high voltage
- Measure the singles rate as a function of Discriminator Threshold
30-04-2008
The DC high voltage is on. The DC outputs of Plastika and Metalica from sense wire 3 are connected to the Model 777 Octal Variable Gain Amplifier.
| HV settings | ||
| Wire | Volts | |
| Sense | 1700 | |
| Field | -800 | |
| Guard | 800 | |
Scope picture below shows the Noise level on the DC measured in infinite persist time mode.
Scope pictures representing the cosmic signals from Plastika and Metalica(Amplifier is connected)
- Plastika
- Metalica
OUTPUTS FROM DISCRIMINATOR
- Discriminator Threshold=365MV
