Hello gate users!<div><br></div><div>I have simulated 59 PMTs (cylindrical volume with glass as material ) on a NaI crystal with a dielectric_metal boundary between them. </div><div><br></div><div>The 59 pmts are defined in a hexagonal array using 2 cubic repeaters and 2 linear repeaters. </div>
<div><br></div><div>I have enabled optical photon generation, and I have included opticaladder. </div><div><br></div><div>I want to know how many photons had hit a particular pmt (in gate user guide it is mentioned that </div>
<div>by using optical adder, one gets the information about the number of photons and not the energy of the photons).</div><div><br></div><div>But my ascii singles file does not seem to give the details properly. here is a sample of the ascii optical singles output --------</div>
<div><br></div><div>0 1768 4 -5.000e+01 -2.200e+02 0.000e+00 0 0 0 7.60134730474956721302249e-03 1.488e+03 -4.809e+01 -1.649e+02 -3.745e-01 0 0 0 0 NULL NULL<br></div><div><br></div><div>
column no 7 to 12 (0 0 0 7.60134730474956721302249e-03 1.488e+03 -4.809e+01) are supposed to be the volume IDs but I don't know how to interpret these floating point numbers! </div><div><br></div><div>column 13 (-1.649e+02 ) should be time stamp of the signal but it is -ve ! (not for all singles, for some of them)</div>
<div><br></div><div>column 14 (is it <span style="font-size:13px;color:rgb(0,0,0);font-family:sans-serif;line-height:19.049999237060547px">Energy deposited by the single or number of photons ?)</span><span style="color:rgb(0,0,0);font-family:sans-serif;font-size:13px;line-height:19.049999237060547px"> and it is </span>showing -3.745e-01 a -ve value ! (not for all singles) If it is value of energy, how can I get the information about the number of photons ?</div>
<div><br></div><div>column 15 to 17 (0 0 0) is <font color="#000000" face="sans-serif"><span style="line-height:19.049999237060547px">XYZ position of the single in the world referential (some are having (0 1 0) and (0 2 0) </span></font><font color="#000000" face="sans-serif"><span style="line-height:19.045454025268555px">except</span></font><font color="#000000" face="sans-serif"><span style="line-height:19.049999237060547px"> this </span><span style="line-height:19.045454025268555px">nothing</span><span style="line-height:19.049999237060547px"> else) how can I interpret it ? (my source is at -5, 0 but singles are at 0,0 )</span></font></div>
<div><font color="#000000" face="sans-serif"><span style="line-height:19.049999237060547px"><br></span></font></div><div><font color="#000000" face="sans-serif"><span style="line-height:19.045454025268555px">Basically</span></font><font color="#000000" face="sans-serif"><span style="line-height:19.049999237060547px"> I </span></font>want to know how many photons had hit a particular pmt, because I want to implement algorithms used in gamma cameras like Anger algorithm, maximum likelihood algorithm etc. If somebody knows an alternative to implement these algorithms can you please share it with me ?</div>
<div><br></div><div>Thank you in advance</div>