Difference between revisions of "CDC recent run drift times"
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| − | <h2>Run 2451</h2> | + | <h2>Run 2451 - solenoid off</h2> |
7 Feb 2015. First run of 2015. Increased sparsification thresholds from 7sigma to 18sigma | 7 Feb 2015. First run of 2015. Increased sparsification thresholds from 7sigma to 18sigma | ||
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Garfield 5475-4525 Ar-CO2 has tmax ~560ns | Garfield 5475-4525 Ar-CO2 has tmax ~560ns | ||
| − | <h2>Run 2551</h2> | + | <h2>Run 2551 - solenoid off</h2> |
2-3 March 2015. 3 weeks after disengaging the alcohol bubbler. | 2-3 March 2015. 3 weeks after disengaging the alcohol bubbler. | ||
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| − | <h2>Run 2560</h2> | + | <h2>Run 2560 - solenoid off</h2> |
8 March 2015. 5 days after changing the CO2 gas factor from 0.773 to 0.74 | 8 March 2015. 5 days after changing the CO2 gas factor from 0.773 to 0.74 | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
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| − | <h2>Run 2577</h2> | + | <h2>Run 2577 - solenoid off</h2> |
10 March 2015. 1 day after changing the gas mixer MFCs from master/slave to independent. For this run the readout window is different from that in all the others. | 10 March 2015. 1 day after changing the gas mixer MFCs from master/slave to independent. For this run the readout window is different from that in all the others. | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
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| − | <h2>Run 2616</h2> | + | <h2>Run 2616 - solenoid at 1200A (?) </h2> |
11 March 2015. 2 days after changing the gas mixer MFCs from master/slave to independent | 11 March 2015. 2 days after changing the gas mixer MFCs from master/slave to independent | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
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| − | <h2>Run 2617</h2> | + | <h2>Run 2617 - solenoid at 1200A</h2> |
11 March | 11 March | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
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Garfield 5200-4800 Ar-CO2 has tmax ~ 595ns | Garfield 5200-4800 Ar-CO2 has tmax ~ 595ns | ||
| − | <h2>Run 2619</h2> | + | <h2>Run 2619 - solenoid at 1200A</h2> |
12 March | 12 March | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
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|} | |} | ||
| − | <h2>Run 2642</h2> | + | <h2>Run 2642 - solenoid off</h2> |
14 March. After moving CO2 controller from ch2 to ch4 (on March 13) and decreasing sparsification thresholds | 14 March. After moving CO2 controller from ch2 to ch4 (on March 13) and decreasing sparsification thresholds | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
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|} | |} | ||
| − | <h2>Run 2644</h2> | + | <h2>Run 2644 - solenoid off</h2> |
16 March. | 16 March. | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
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| − | <h2>Run 2649</h2> | + | <h2>Run 2649 - solenoid off</h2> |
17 March. 10 hours after returning CO2 controller from ch4 to ch2 | 17 March. 10 hours after returning CO2 controller from ch4 to ch2 | ||
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
| Line 118: | Line 118: | ||
| − | <h2>Run 2676</h2> | + | <h2>Run 2676 - solenoid off</h2> |
22 March. | 22 March. | ||
Revision as of 14:00, 27 March 2015
Fitted drift time function to straws in run 2451, picked straws with tmax slope < 30, used same straws for subsequent runs.
Used same hit thresholds & window for all runs.
The drift times are for a small group of straws, the amplitude & pedestal histograms are for ALL straws. In the earlier runs the amplitude histograms are cut off at the lower end by the sparsification threshold so I would not pay too much attention to these. I will look to see if there are any straws with a low enough threshold that the amplitude MPV is visible.
Contents
- 1 Run 2451 - solenoid off
- 2 Run 2551 - solenoid off
- 3 Run 2560 - solenoid off
- 4 Run 2577 - solenoid off
- 5 Run 2616 - solenoid at 1200A (?)
- 6 Run 2617 - solenoid at 1200A
- 7 Run 2619 - solenoid at 1200A
- 8 Run 2642 - solenoid off
- 9 Run 2644 - solenoid off
- 10 Run 2649 - solenoid off
- 11 Run 2676 - solenoid off
Run 2451 - solenoid off
7 Feb 2015. First run of 2015. Increased sparsification thresholds from 7sigma to 18sigma
Garfield 5475-4525 Ar-CO2 has tmax ~560ns
Run 2551 - solenoid off
2-3 March 2015. 3 weeks after disengaging the alcohol bubbler.
Run 2560 - solenoid off
8 March 2015. 5 days after changing the CO2 gas factor from 0.773 to 0.74
Run 2577 - solenoid off
10 March 2015. 1 day after changing the gas mixer MFCs from master/slave to independent. For this run the readout window is different from that in all the others.
Run 2616 - solenoid at 1200A (?)
11 March 2015. 2 days after changing the gas mixer MFCs from master/slave to independent
Run 2617 - solenoid at 1200A
11 March
Garfield 5200-4800 Ar-CO2 has tmax ~ 595ns
Run 2619 - solenoid at 1200A
12 March
Run 2642 - solenoid off
14 March. After moving CO2 controller from ch2 to ch4 (on March 13) and decreasing sparsification thresholds
Run 2644 - solenoid off
16 March.
Run 2649 - solenoid off
17 March. 10 hours after returning CO2 controller from ch4 to ch2
Run 2676 - solenoid off
22 March.
