Difference between revisions of "CDC recent run drift times"

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<h2>Run 2617</h2>
 
<h2>Run 2617</h2>
−
March 11
+
11 March
 
{| border="0" cellpadding="2"  
 
{| border="0" cellpadding="2"  
 
|+ Hit thresholds 180-100-25, window 44-150
 
|+ Hit thresholds 180-100-25, window 44-150
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<h2>Run 2619</h2>
 
<h2>Run 2619</h2>
 +
12 March
 
{| border="0" cellpadding="2"  
 
{| border="0" cellpadding="2"  
 
|+ Hit thresholds 180-100-25, window 44-150
 
|+ Hit thresholds 180-100-25, window 44-150
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|[[Image:cdc_run2619_ped.png|thumb|x200px|pedestal]]
 
|[[Image:cdc_run2619_ped.png|thumb|x200px|pedestal]]
 
|}
 
|}
 +
 +
<h2>Run 2642</h2>
 +
14 March. After moving CO2 controller from ch2 to ch4 (on March 13) and decreasing sparsification thresholds
  
 
<h2>Run 2644</h2>
 
<h2>Run 2644</h2>
−
After moving CO2 controller from ch2 to ch4 and decreasing sparsification thresholds
+
16 March.
  
 
<h2>Run 2649</h2>
 
<h2>Run 2649</h2>
−
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"  
 
|+ Hit thresholds 180-100-25, window 44-150
 
|+ Hit thresholds 180-100-25, window 44-150

Revision as of 09:27, 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.


Run 2451

7 Feb 2015. First run of 2015. Increased sparsification thresholds from 7sigma to 18sigma

Hit thresholds 180-100-25, window 44-150
Drift time fit straws with param 6 < 30
zoomed in
max amplitude - pedestal
pedestal

Garfield 5475-4525 Ar-CO2 has tmax ~560ns

Run 2551

2-3 March 2015. 3 weeks after disengaging the alcohol bubbler.

Hit thresholds 180-100-25, window 44-150
Drift time fit straws with param 6 < 30
zoomed in
max amplitude - pedestal
pedestal

Run 2560

8 March 2015. 5 days after changing the CO2 gas factor from 0.773 to 0.74

Hit thresholds 180-100-25, window 44-150
Drift time fit straws with param 6 < 30
zoomed in
max amplitude - pedestal
pedestal

Run 2577

10 March 2015. 1 day after changing the gas mixer MFCs from master/slave to independent

Run 2616

11 March 2015. 2 days after changing the gas mixer MFCs from master/slave to independent

Hit thresholds 180-100-25, window 44-150
Drift time fit straws with param 6 < 30
zoomed in
max amplitude - pedestal
pedestal

Run 2617

11 March

Hit thresholds 180-100-25, window 44-150
Drift time fit
zoomed in
max amplitude - pedestal
pedestal

Garfield 5200-4800 Ar-CO2 has tmax ~ 595ns

Run 2619

12 March

Hit thresholds 180-100-25, window 44-150
Drift time fit
zoomed in
max amplitude - pedestal
pedestal

Run 2642

14 March. After moving CO2 controller from ch2 to ch4 (on March 13) and decreasing sparsification thresholds

Run 2644

16 March.

Run 2649

17 March. 10 hours after returning CO2 controller from ch4 to ch2

Hit thresholds 180-100-25, window 44-150
Drift time fit
zoomed in
max amplitude - pedestal
pedestal
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