Difference between revisions of "CDC recent run drift times"

From GlueXWiki
Jump to: navigation, search
Line 4: Line 4:
  
 
<h2>Run 2451</h2>
 
<h2>Run 2451</h2>
−
First run of 2015.  Feb 7.  Increased sparsification thresholds from 7sigma to 18sigma
+
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. March 2-3 2015
+
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>
−
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"  
 
|+ 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>
−
After changing the gas mixer MFCs from master/slave to independent, March 11
+
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.


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.

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

March 11

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

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

Run 2644

After moving CO2 controller from ch2 to ch4 and decreasing sparsification thresholds

Run 2649

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
Retrieved from "https://halldweb1.jlab.org/wiki/index.php?title=CDC_recent_run_drift_times&oldid=64466"