Difference between revisions of "CDC recent run drift times"
From GlueXWiki
Line 4: | Line 4: | ||
<h2>Run 2451</h2> | <h2>Run 2451</h2> | ||
− | First run of 2015 | + | 7 Feb 2015. First run of 2015. Increased sparsification thresholds from 7sigma to 18sigma |
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
|+ Hit thresholds 180-100-25, window 44-150 | |+ Hit thresholds 180-100-25, window 44-150 | ||
Line 16: | Line 16: | ||
<h2>Run 2551</h2> | <h2>Run 2551</h2> | ||
− | 3 weeks after disengaging the alcohol bubbler. | + | 2-3 March 2015. 3 weeks after disengaging the alcohol bubbler. |
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
|+ Hit thresholds 180-100-25, window 44-150 | |+ Hit thresholds 180-100-25, window 44-150 | ||
Line 27: | Line 27: | ||
<h2>Run 2560</h2> | <h2>Run 2560</h2> | ||
− | + | 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" | ||
|+ Hit thresholds 180-100-25, window 44-150 | |+ Hit thresholds 180-100-25, window 44-150 | ||
Line 36: | Line 36: | ||
|[[Image:cdc_run2560_ped.png|thumb|x200px|pedestal]] | |[[Image:cdc_run2560_ped.png|thumb|x200px|pedestal]] | ||
|} | |} | ||
+ | |||
+ | <h2>Run 2577</h2> | ||
+ | 10 March 2015. | ||
<h2>Run 2616</h2> | <h2>Run 2616</h2> | ||
− | + | 11 March 2015. 2 days after changing the gas mixer MFCs from master/slave to independent | |
{| border="0" cellpadding="2" | {| border="0" cellpadding="2" | ||
|+ Hit thresholds 180-100-25, window 44-150 | |+ Hit thresholds 180-100-25, window 44-150 |
Revision as of 09:19, 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.
Contents
Run 2451
7 Feb 2015. First run of 2015. Increased sparsification thresholds from 7sigma to 18sigma
Garfield 5475-4525 Ar-CO2 has tmax ~560ns
Run 2551
2-3 March 2015. 3 weeks after disengaging the alcohol bubbler.
Run 2560
8 March 2015. 5 days after changing the CO2 gas factor from 0.773 to 0.74
Run 2577
10 March 2015.
Run 2616
11 March 2015. 2 days after changing the gas mixer MFCs from master/slave to independent
Run 2617
March 11
Garfield 5200-4800 Ar-CO2 has tmax ~ 595ns
Run 2619
Run 2644
After moving CO2 controller from ch2 to ch4 and decreasing sparsification thresholds
Run 2649
After returning CO2 controller from ch4 to ch2