Difference between revisions of "MiniPrototype CosmicRuns"
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|Guard || 800 || 0 | |Guard || 800 || 0 | ||
| + | |} | ||
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| + | [[Image:Run206_12-25-07.jpg]] | ||
| + | ==12/27/07== | ||
| + | |||
| + | Run 207: Unplugged scope and started this run | ||
| + | |||
| + | |||
| + | Drift Chamber turned on with 90/10 ArCO2 and the voltages below | ||
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| + | {| border="1" |cellpadding="20" cellspacing="0 | ||
| + | |colspan= "3" | HV settings | ||
| + | |- | ||
| + | | Wire || Volts || current (<math>\mu</math>A) | ||
| + | |- | ||
| + | |Sense || 1600 || 19 | ||
| + | |- | ||
| + | |Field || -850 || 19 | ||
| + | |- | ||
| + | |Guard || 850 || 0 | ||
|} | |} | ||
Revision as of 17:46, 27 December 2007
Cosmic Coincidences
setup
Setup a cosmic coincidence experiment with two crossed scintillators that have the proto-type drift chambers sandwhiched between them.
Built 4 100 ns long delay cables. 2 for the PMTs and one for sense wire 7 on each of the drift chambers.
The top PMT is in channel 7 of the QDC and channel 16 of the scaler.
The Bottom PMT is on channel 8 of the QDC and channel 7 of the scaler.
Coincidence counts are recorded in channel 2 of the scaler.
Runs
Drift Chamber is off
Run 182: Ran with coincidence module in "OR" mode so if either paddle triggered the ADC was read out
Run 183: Switched coincidence module to "AND" mode and ran overnight.
12/23/07
Drift Chamber turned on with 90/10 ArCO2 and the voltages below
| HV settings | ||
| Wire | Volts | current (A) |
| Sense | 1500 | 19 |
| Field | -800 | 19 |
| Guard | 800 | 0 |
Run 204: Scope was plugged into DC output (split signal)
12/24/07
Run 206: Unplugged scope and started this run
Drift Chamber turned on with 90/10 ArCO2 and the voltages below
| HV settings | ||
| Wire | Volts | current (A) |
| Sense | 1500 | 19 |
| Field | -800 | 19 |
| Guard | 800 | 0 |
12/27/07
Run 207: Unplugged scope and started this run
Drift Chamber turned on with 90/10 ArCO2 and the voltages below
| HV settings | ||
| Wire | Volts | current (A) |
| Sense | 1600 | 19 |
| Field | -850 | 19 |
| Guard | 850 | 0 |