PePPO 05302012: Difference between revisions

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=Data Analysis=
=Data Analysis=
==Calibration==
https://positron.jlab.org/wiki/index.php/05232012_AnnihCntr_Calibration#Results
The calibration constants appear to have changed from
511/22230 for Annihlation Detector A1 to 511/29588  (ped subtracted)
511/18192 for Annihlation Detector A3  to 511/13706  (ped subtracted)
Fits to the peaks in run 5440 and 5441 gave the following results
{| border="1"  |cellpadding="20" cellspacing="0
|-
|      Energy      || A1 Channel || A3 Channel
|-
| 0  || 40002 ||41709.5
|-
|  511 ||  69655.5 || 55603.8
|-
|  1170  || 100127  || 71544.4
|-
|  1270  || 104293  || 74165.3
|-
|  1330  ||  106243 || 75307.7
|}
The high energy points overweight the linear fit for that energy region so I removed the 1179 and 1270 line from the fit.
For A1 :
<pre>
slope=50.1811 +/- 2.10455
y-intercept=41498.3 +/- 1894.94
coerrelation coefficient=0.998246
</pre>
For A3:
<pre>
slope=25.3515 +/- 0.488128
y-intercept=42052.6 +/- 439.513
coerrelation coefficient=0.999628
</pre>
A fit biased by including three 1 MeV lines is
;For A1
<pre>
slope=45.8536 +/- 0.50289
y-intercept=46253.9 +/- 522.854
coerrelation coefficient=0.999941
</pre>
;For A3
<pre>
slope=24.3591 +/- 0.219479
y-intercept=43143.2 +/- 228.192
coerrelation coefficient=0.999961
</pre>


==Target IN/OUT==
==Target IN/OUT==
Line 63: Line 124:


[
[
= Run Conditions=
==5775==
Run_type=Annihilation
DAQ_type=Sample
target_type=0.1 mm Tungsten
beam_p0=7.9
beam_current=0.001
spect_p=4.0
HWP_type=IN
jaw_jawL=13
jaw_jawR=-1
spect_current=160
mag_current=+60A
comment_text=Annihilation test in positron mode Thr =30mV AND, 1 nA, Chomox target in
-----
-----
CODA Config : Annih_Sample
Run Number : 5775
==5774==
Run_type=Annihilation
DAQ_type=Sample
target_type=1 mm Tungsten
beam_p0=7.9
beam_current=0.001
spect_p=4.0
HWP_type=IN
jaw_jawL=13
jaw_jawR=-1
spect_current=160
mag_current=+60A
comment_text=Annihilation test in positron mode Thr =30mV AND, 1 nA, Chomox target in
-----
-----
CODA Config : Annih_Sample
Run Number : 5774
==5776==
Run_type=Annihilation
DAQ_type=Sample
target_type=1 mm Tungsten
beam_p0=7.9
beam_current=0.0005
spect_p=4.0
HWP_type=IN
jaw_jawL=13
jaw_jawR=-1
spect_current=160
mag_current=+60A
comment_text=Annihilation test in positron mode Thr =30mV AND, 0.05 nA, Chomox target in
-----
-----
CODA Config : Annih_Sample
Run Number : 5776
== 5779 ==
Run_type=Annihilation
DAQ_type=Sample
target_type=0.5 mm Tungsten
beam_p0=7.9
beam_current=0.0005
spect_p=4.0
HWP_type=IN
jaw_jawL=13
jaw_jawR=-1
spect_current=160
mag_current=+60A
comment_text=Annihilation test in positron mode Thr =30mV AND, 0.05 nA, Chomox target out
-----
-----
CODA Config : Annih_Sample
Run Number : 5779

Latest revision as of 02:07, 27 July 2012

Runlist

Signal channel HV dac HV (V) readback
Run No. Run Time (s) e- Current (nA) Converter Target Mode DAQ Rate (Hz) Chromox Target Position
5767 1566 1 1 mm thick W positron In
5768 1763 1 1 mm thick W positron Out
5774 1 1 mm thick W positron 75 IN
5775 1 0.1 mm thick W positron 75 IN
5776 1408 0.5 1 mm thick W positron 75 In
5778 858 0.5 1 mm thick W positron 50 Out
5779 1338 0.5 0.5 mm thick W positron 50 In

Data Analysis

Calibration

https://positron.jlab.org/wiki/index.php/05232012_AnnihCntr_Calibration#Results


The calibration constants appear to have changed from

511/22230 for Annihlation Detector A1 to 511/29588 (ped subtracted)

511/18192 for Annihlation Detector A3 to 511/13706 (ped subtracted)


Fits to the peaks in run 5440 and 5441 gave the following results

Energy A1 Channel A3 Channel
0 40002 41709.5
511 69655.5 55603.8
1170 100127 71544.4
1270 104293 74165.3
1330 106243 75307.7


The high energy points overweight the linear fit for that energy region so I removed the 1179 and 1270 line from the fit. For A1 : 

slope=50.1811 +/- 2.10455
y-intercept=41498.3 +/- 1894.94 
coerrelation coefficient=0.998246

For A3: 

slope=25.3515 +/- 0.488128
y-intercept=42052.6 +/- 439.513 
coerrelation coefficient=0.999628

A fit biased by including three 1 MeV lines is

For A1
slope=45.8536 +/- 0.50289
y-intercept=46253.9 +/- 522.854 
coerrelation coefficient=0.999941
For A3
slope=24.3591 +/- 0.219479
y-intercept=43143.2 +/- 228.192 
coerrelation coefficient=0.999961


Target IN/OUT

Run 5767 & 5768

File:R5767TarIn r5768TarOut.png

Run 5776 & 5778

Tight TDC cits TDC_A1-TDC_A3 < 5 nsec

Rates-vs- Converter thickness

Run No. Run Time (s) e- Current (nA) Converter Target Mode Chromox Target Position
5774 489 1 1 mm thick W positron IN
5775 347 1 0.1 mm thick W positron IN
5776 1408 0.5 1 mm thick W positron In
5779 1338 0.5 0.5 mm thick W positron In

Run 5774 & 5775

Calibration: 60 Ch/keV

File:R5774WTar1mm r5775WTar0p1mm A1Compare.png

Run 5776 & 5779

Calibration: 60 Ch/keV

File:R5776WTar1mm r5779WTar0p5mm A1Compare.png


[

Run Conditions

5775

Run_type=Annihilation

DAQ_type=Sample

target_type=0.1 mm Tungsten

beam_p0=7.9

beam_current=0.001

spect_p=4.0

HWP_type=IN

jaw_jawL=13

jaw_jawR=-1 spect_current=160

mag_current=+60A

comment_text=Annihilation test in positron mode Thr =30mV AND, 1 nA, Chomox target in


CODA Config : Annih_Sample

Run Number : 5775

5774

Run_type=Annihilation

DAQ_type=Sample

target_type=1 mm Tungsten

beam_p0=7.9

beam_current=0.001

spect_p=4.0

HWP_type=IN

jaw_jawL=13

jaw_jawR=-1

spect_current=160

mag_current=+60A

comment_text=Annihilation test in positron mode Thr =30mV AND, 1 nA, Chomox target in


CODA Config : Annih_Sample

Run Number : 5774

5776

Run_type=Annihilation

DAQ_type=Sample

target_type=1 mm Tungsten

beam_p0=7.9

beam_current=0.0005

spect_p=4.0

HWP_type=IN

jaw_jawL=13

jaw_jawR=-1

spect_current=160

mag_current=+60A

comment_text=Annihilation test in positron mode Thr =30mV AND, 0.05 nA, Chomox target in



CODA Config : Annih_Sample

Run Number : 5776


5779

Run_type=Annihilation

DAQ_type=Sample

target_type=0.5 mm Tungsten

beam_p0=7.9

beam_current=0.0005

spect_p=4.0

HWP_type=IN

jaw_jawL=13

jaw_jawR=-1

spect_current=160

mag_current=+60A

comment_text=Annihilation test in positron mode Thr =30mV AND, 0.05 nA, Chomox target out



CODA Config : Annih_Sample

Run Number : 5779

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