Difference between revisions of "PePPO 05302012"

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[
 
[
 +
= 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

400 px

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

400 px

Run 5776 & 5779

Calibration: 60 Ch/keV

400 px


[

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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