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<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">Dear
gate users,</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">I'm
using a PETscanner system in order to study the TOF of the Cherenkov
Photons coincidences. </font></font></font>
</p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">I
get acceptable results for the TOF with 15 000 primary events,
different materials (LSO, LYSO, BGO and PbF₂) but now I'm
looking for more statistics in the simulation with the aim of
comparing my results with the experimental ones….</font></font></font></p>
<p align="justify" style="margin-bottom:0in;line-height:100%">
<span style="font-variant:normal"><font color="#000000"><span style="letter-spacing:normal">
<font face="Times New Roman, serif"><font size="3" style="font-size:12pt"><span style="font-style:normal"><span style="font-weight:normal">My
simulation at some point stops when I use more primary events and I
</span></span></font></font></span></font></span><span style="font-variant:normal"><font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt"><span style="letter-spacing:normal"><span style="font-style:normal"><span style="font-weight:normal">can</span></span></span></font></font></font></span><span style="font-variant:normal"><font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt"><span style="letter-spacing:normal"><span style="font-style:normal"><span style="font-weight:normal">'</span></span></span></font></font></font></span><em><span style="font-variant:normal"><font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt"><span style="letter-spacing:normal"><span style="font-style:normal"><span style="font-weight:normal">t</span></span></span></font></font></font></span></em><span style="font-variant:normal"><font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt"><span style="letter-spacing:normal"><span style="font-style:normal"><span style="font-weight:normal">
understand why….</span></span></span></font></font></font></span></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">As
I said in a previous email for different seeds (1, 2 and 3) in my
output.root I get 14 000 Singles and 2 000 Coincidences using PbF₂crystals. The number of primary events in which the simulation
stops is different in each case….</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">For
this simulations I used: </font></font></font>
</p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">#
a simple back-back annigilation gamma source</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/addSource
PencilBeam</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/PencilBeam/setType
backtoback </font></font></font>
</p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/PencilBeam/gps/particle
gamma </font></font></font>
</p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/PencilBeam/gps/energytype
Mono</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/PencilBeam/gps/monoenergy
511. keV</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">#
position</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/PencilBeam/gps/centre
0. 0. 0. cm </font></font></font>
</p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">#
angular distribution approximately! covering entry window in current
geometry!</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/PencilBeam/gps/angtype
iso </font></font></font>
</p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/PencilBeam/gps/mintheta
65. deg </font></font></font>
</p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/PencilBeam/gps/maxtheta
115. deg </font></font></font>
</p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/PencilBeam/gps/minphi
-10. deg </font></font></font>
</p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/source/PencilBeam/gps/maxphi
 10. deg</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">If
I comment the last 4 lines of my source definition turning it into a
source that emits in a backtoback isotropically my simulation stops
using seed 1 in 395 725 (almost 400 000) primary events (1 h) when
complete 15 000 Singles (1 000 more than before) and the same 2 000
Coincidences….</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">If
I also comment the coincidences information in the output.root my
simulation stops again using seed 1 in the same amount of  primary
events (395 725) when complete again, 15 000 Singles….</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">So,
I do not think that my real problem be in the amount of initial
particles with which I run my simulation. Maybe is more related with
the way in which the Singles are stored in Gate for a PETscanner system
in order to calculate which events are or not in coincidence….</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant-numeric:normal;font-variant-east-asian:normal;line-height:100%">
<font color="#000000" style="font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">Maybe
there is some cut-off somewhere that doesn'<em><span style="font-style:normal">t
</span></em>allow my simulation to continue when i<em><span style="font-style:normal">t</span></em><em><span style="font-style:normal">'</span></em>s
initiated with more primary events and many <span style="color:rgb(0,0,0);font-family:"Times New Roman",serif;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:justify;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Cherenkov Photons are produced. <span style="color:rgb(0,0,0);font-family:"Times New Roman",serif;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:justify;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">I'm</span> also using the </span></font></font></font><font color="#000000" face="Times New Roman, serif"><span style="font-size:16px">RoughTeflon_LUT surface for the crystals....</span></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">I
would like to point out that as I'm working with Cherenkov Photons I'm using the <span style="color:rgb(0,0,0);font-family:"Times New Roman",serif;font-size:16px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:justify;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">opticaladder</span>: </font></font></font>
</p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/digitizer/Singles/insert
                          opticaladder</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/digitizer/Singles/insert
                          readout</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">/gate/digitizer/Singles/readout/setDepth
                3</font></font></font></p><p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%"><font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt"><br></font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">Any
help I would really appreciate it….</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:0.13in">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">Best
regards,</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:0.13in">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">Dania
Consuegra Rodríguez</font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:0.13in">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt"><font face="Times New Roman, serif">Phd
student </font><em><font face="Times New Roman, serif"><span style="font-style:normal"><b>Jožef
Stefan Institute</b></span></font></em></font></font></font></p>
<p align="justify" style="margin-bottom:0in;font-variant:normal;letter-spacing:normal;font-style:normal;font-weight:normal;line-height:100%">
<font color="#000000"><font face="Times New Roman, serif"><font size="3" style="font-size:12pt">PD>
With my analysis of the root output information I can get the TOF or
from the information of the Singles tree or  from the information of
the Coincidences tree with differences of less than 1 ps between both
methods. </font></font></font>
</p>
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<br>

</p>

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