DVCS Trigger efficiency studies 11-Oct-2007 - Revision history

Boiarino at 18:28, 16 October 2007

2007-10-16T18:28:03Z

← Older revision		Revision as of 14:28, 16 October 2007
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	Sergey,		Sergey,

	Attached is the [http://clonweb/wiki/clondocs/DVCS_Trigger/~~dvcs_047213_trigger_efficiency~~.xls update excel file] that contains various trigger conditions		Attached is the [http://clonweb/wiki/clondocs/DVCS_Trigger/dvcs_047213_trigger_efficiency_oct11.xls update excel file] that contains various trigger conditions
	for the dvcs_047213_pi0, dvcs_047213_10000events, and clas_047210 data		for the dvcs_047213_pi0, dvcs_047213_10000events, and clas_047210 data
	sets.		sets.

Boiarino at 18:13, 16 October 2007

2007-10-16T18:13:47Z

← Older revision		Revision as of 14:13, 16 October 2007
Line 1:		Line 1:
	Sergey,		Sergey,

	Attached is the [update excel file] that contains various trigger conditions		Attached is the [http://clonweb/wiki/clondocs/DVCS_Trigger/dvcs_047213_trigger_efficiency.xls update excel file] that contains various trigger conditions
	for the dvcs_047213_pi0, dvcs_047213_10000events, and clas_047210 data		for the dvcs_047213_pi0, dvcs_047213_10000events, and clas_047210 data
	sets.		sets.

Boiarino at 18:11, 16 October 2007

2007-10-16T18:11:40Z

← Older revision		Revision as of 14:11, 16 October 2007
Line 1:		Line 1:
	Sergey,		Sergey,

	Attached is the update excel file that contains various trigger conditions		Attached is the [update excel file] that contains various trigger conditions
	for the dvcs_047213_pi0, dvcs_047213_10000events, and clas_047210 data		for the dvcs_047213_pi0, dvcs_047213_10000events, and clas_047210 data
	sets.		sets.

Boiarino at 18:10, 16 October 2007

2007-10-16T18:10:46Z

New page

Sergey,

Attached is the update excel file that contains various trigger conditions
for the dvcs_047213_pi0, dvcs_047213_10000events, and clas_047210 data
sets.

The best trigger rate reduction was done by setting minimum energy
thresholds at 140 and requiring a single 3x3 window to have at least 3
hits. With this the trigger rates were:

dvcs_047213_pi0 100%
dvcs_047213_10000events 92.2%
clas_047210 14.4%

There are 2 sheets showing the first 9 accepted, and then the first 9
rejected event images.

I then ran the 3 data sets with triggers requiring only 2 hits in the
detector with thresholds over 470 (no 3x3 windows were used). With this
the trigger rates became:

dvcs_047213_pi0 100%
dvcs_047213_10000events 80.7%
clas_047210 9.2%

There are again 2 addition sheets showing the first 9 accepted and
rejected events. At first glance, the 9.2% accepted events appear to be a
subset of the accepted 14.4% from above.

Let me know what you think. I still have some questions regarding what
events should be accepted as PI0 events and if PI0 events are the only
type of events that should be triggered on.

Thanks,
Ben