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<div class="" style="word-wrap:break-word">Dear Alaa,
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<div class="">Thank you for your email - I had a quick look at your instrument file and made some adjustments - see attached.</div>
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<div class="">1) I Assume that in cases where your DiskChoppers are AT the same place they make up an “assembly” or GROUP? In these cases you should also</div>
<div class=""><span class="x_Apple-tab-span" style="white-space:pre"></span>- Include the first of these choppers in the GROUP also - done in the attached</div>
<div class=""><span class="x_Apple-tab-span" style="white-space:pre"></span>- For each individual chopper assembly, there has to be a unique GROUP name, hence I created in total 5 GROUPS</div>
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<div class="">2) Are BC_1 and BC_2 maybe meant to be counter-rotating? In that case I think you are missing a sign-change on the frequency parameter of one of them?</div>
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<div class="">3) I added a new input parameter Chopper_in that via the WHEN keyword can disable all of the choppers beyond the first counter-rotating set.</div>
<div class=""><span class="x_Apple-tab-span" style="white-space:pre"></span>- I also had to put a “dummy” arm component pr. chopper group to make sure there is a SCATTER when the group is deactivated by the WHEN.</div>
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<div class="">We are now in the situation that neutrons are transported both when the choppers are in and out - further optimisation quite likely necessary (only 8 rays out of 1e7 makes it to the sample when choppers are in…), but this at least gives you a
way forward. :-)</div>
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<div class="">Hope this helps, and good luck moving further. </div>
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<div class="">Best,</div>
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<div class="">Peter Willendrup</div>
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<div class="">On 13 Dec 2016, at 10:16 , Ala'a Al-Falahat <<a href="mailto:alaa.falahat@gmail.com" class="">alaa.falahat@gmail.com</a>> wrote:</div>
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<div class="x_gmail_default">Dear users,</div>
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<div class="x_gmail_default">I have started to simulate the ESS Test Beam Line at HZB center (please find the attached files to show the instrument in details).</div>
<div class="x_gmail_default">I have generated proper code for it (see instrument file attached below) but I get a warning message that no neutron could reach to some component when I try to get a result, </div>
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<div class="x_gmail_default"><font face="arial, helvetica, sans-serif" class="">Hopefully, you can find a solution on that.</font></div>
<div class="x_gmail_default"><font face="arial, helvetica, sans-serif" class="">For more information don't hesitate to contact me.</font></div>
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<div class="x_gmail_default"><font face="arial, helvetica, sans-serif" class=""><font color="#ff0000" class="">The first attached
</font>you should find at the page number 2 the whole instrument. </font></div>
<div class="x_gmail_default"><font face="arial, helvetica, sans-serif" class=""><font color="#ff0000" class="">The second attached</font> in appendix A , you should find the instrument in details.</font></div>
<div class="x_gmail_default"><font face="arial, helvetica, sans-serif" class=""><font color="#ff0000" class="">The third attached</font> you will find the instrument file I did. </font></div>
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<div class="x_gmail_default" style="font-family:arial,helvetica,sans-serif"> </div>
<div class="x_gmail_default" style="font-family:arial,helvetica,sans-serif">with many wishes </div>
<div class="x_gmail_default" style="font-family:arial,helvetica,sans-serif">Alaa</div>
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<p class=""><span class="" style="background-color:rgb(255,255,255)"><font color="#9fc5e8" class="">---------------------------------------------------------------------------------------------------------------------------</font></span></p>
<p class=""><font color="#76a5af" size="2" class=""><b class="" style="background-color:rgb(255,255,255)">Institute of Applied Materials<br class="">
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<span id="x_cid:55C9A105-AD43-4631-BF69-6F7AEC42C61B@fysik.dtu.dk"><(First attached)The wavelength frame multiplication chopper system for the ESS test beamline at the BER II reactor.pdf></span><span id="x_cid:158B94C3-AA87-4B63-8EC9-FF03D929EF09@fysik.dtu.dk"><(second
attached)The test beamline of the European Spallation Source – Instrumentation.pdf></span><span id="x_cid:0B4107BC-A139-456F-A82C-FCB2ECF16746@fysik.dtu.dk"><V20TestBeamLineV2.instr></span>_______________________________________________<br class="">
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