05/19/2011 n's detector threshold calibration source/(w/source) - Revision history

Shaproma at 19:01, 24 May 2012

2012-05-24T19:01:44Z

2011-06-03T20:14:47Z

2011-06-03T20:13:59Z

2011-06-03T20:13:39Z

2011-06-03T20:13:17Z

2011-06-03T20:12:37Z

2011-06-03T20:11:27Z

2011-06-03T16:43:01Z

2011-06-03T16:40:37Z

2011-06-03T16:39:56Z

← Older revision		Revision as of 19:01, 24 May 2012
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−	[https://wiki.iac.isu.edu/index.php/~~N%27s_detector_calibration Go Back~~]	+	[https://wiki.iac.isu.edu/index.php/Roman_measurements go back]

@@ Line 61: / Line 61: @@
 Below are Jason's data and calculations:
-[[File:Table Jason.png | 1000px]]
+[[File:Table Jason.png | 1200px]]
 And below I overlay my and Jason's results (linear scale):

@@ Line 28: / Line 28: @@
-=Let's recalculate all data using the formula:=
+==Let's recalculate all data using the formula:==
   <math>\mbox{Ratio} = \frac{R_s - R_{w/s}}{R_{w/s}}</math>
@@ Line 57: / Line 57: @@
-=Let's compare with what Jason did (at different place,different time and different PMT):=
+==Let's compare with what Jason did (at different place,different time and different PMT):==
 Below are Jason's data and calculations:

@@ Line 4: / Line 4: @@
 Below are my counts rate measurements as function of threshold voltage for n's detector. The source was CF252. The distance between source and n's PMT was about 50 cm.  It was 1 PMT set up detector and experiment was hold in LDS on May 19 2011.
-=First the counts rate was calculated as=:
+==First the counts rate was calculated as:==
   <math>\mbox{Rate} = \frac{N_{\mbox{source}} - N_{\mbox{w/source}}}{\mbox{Time}}</math>

@@ Line 4: / Line 4: @@
 Below are my counts rate measurements as function of threshold voltage for n's detector. The source was CF252. The distance between source and n's PMT was about 50 cm.  It was 1 PMT set up detector and experiment was hold in LDS on May 19 2011.
-First the counts rate was calculated as:
+=First the counts rate was calculated as=:
   <math>\mbox{Rate} = \frac{N_{\mbox{source}} - N_{\mbox{w/source}}}{\mbox{Time}}</math>
@@ Line 28: / Line 28: @@
-Let's recalculate all data using the formula:
+=Let's recalculate all data using the formula:=
   <math>\mbox{Ratio} = \frac{R_s - R_{w/s}}{R_{w/s}}</math>
@@ Line 57: / Line 57: @@
-Let's compare with what Jason did (at different place,different time and different PMT):
+=Let's compare with what Jason did (at different place,different time and different PMT):=
 Below are Jason's data and calculations:

@@ Line 45: / Line 45: @@
 [[File:Det ratio lin.png | 1000px]]
-and for log scale:
+and in log scale:
 [[File:Det ratio log.png | 1000px]]
@@ Line 55: / Line 55: @@
 # The power supply voltage is as expected -1500 V (there are no plateau for -1250 V)
-[[File:Jasons callibration.png | 800px]]
 [https://wiki.iac.isu.edu/index.php/05/19/2011_n%27s_detector_threshold_calibration_source/%28w/source%29 go up]

← Older revision		Revision as of 16:43, 3 June 2011
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−	There are two important ~~conclusion~~ at least for this type of PMT was used:	+	There are two important conclusions at least for this type of PMT was used:

	# The desirable threshold is about -50 mV		# The desirable threshold is about -50 mV

← Older revision		Revision as of 16:40, 3 June 2011
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	[[File:Jasons callibration.png \| 800px]]		[[File:Jasons callibration.png \| 800px]]
		+
		+
		+
		+	[https://wiki.iac.isu.edu/index.php/05/19/2011_n%27s_detector_threshold_calibration_source/%28w/source%29 go up]

← Older revision		Revision as of 16:39, 3 June 2011
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	# The power supply voltage is as expected -1500 V (there are no plateau for -1250 V)		# The power supply voltage is as expected -1500 V (there are no plateau for -1250 V)

−	And ~~also~~ some ~~difference~~ with	+	And there are some discrepancy with Jason's measurements which he did at different place and time and with different PMT and looks like:
		+
		+	[[File:Jasons callibration.png \| 800px]]