<div dir="ltr"><div dir="ltr"><div>Hi,</div><div><br></div><div>I loaded the alignment manual into docdb at <a href="https://halldweb.jlab.org/DocDB/0037/003739/001/alignment__notes_oct2017.pdf">https://halldweb.jlab.org/DocDB/0037/003739/001/alignment__notes_oct2017.pdf</a>   there are several other docs from Mike there relating to alignment</div><div><br></div><div>& I pasted some comments about it from Alex Barnes below.</div><div><br></div><div>Best,</div><div><br></div><div>Naomi.</div><div><br></div><div>------------------------------- voice of Barnes: -------------------------------------------------------</div><div><br></div><span style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><div dir="ltr"><span style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Mike had many directories where he worked on alignment. I tried navigating by `ls -ltr` to see when he last touched directories and assumed those were the "best".</span><br style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><br style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">/raid13/mstaib/</span><wbr style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Spring2017Alignment</span><br style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">/raid13/mstaib/CDC_FieldOn_</span><wbr style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">WithoutAlignmentConstants</span><br style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">/raid13/mstaib/CDC_FieldOn_</span><wbr style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">WithAlignmentConstants</span><br style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">/raid13/mstaib/</span><wbr style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">ThesisZeroAlign* directories</span><br style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><span style="font-size:12.8px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">/raid13/mstaib/Alignment</span><br style="font-size:12.8px;text-decoration-style:initial;text-decoration-color:initial"><br></span></div>I think it might be good to look at when the last calibration constants appeared in the CCDB and then find a directory that was worked on around that time. That'll be my guess for the last "correct" results. I struggled to match what I saw in some of these directories. This document only goes so far. </span></div><div dir="ltr"><span style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><br></span></div><div dir="ltr"><span style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">I think the FDC part went well. It was the next step which got confusing and didn't have enough documentation. I couldn't figure out what order he made tweaks. It's this part that becomes more of an art because you have to decide which things to hold steady and which things to allow to move. It's always the same process but you just change the config file to hold some things and free others. This is the part that Mike said takes the longest to learn.</span><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Reference documents:</span><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Mike recommended to read the book "Data analysis techniques for high-energy physics" by Rudolf Frühwirth and M. Regler. </span></div><div dir="ltr"><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><a class="gmail-m_-6969130007001837127moz-txt-link-freetext" href="https://halldweb.jlab.org/DocDB/0029/002947/001/MStaibCDCUpdateFeb2016.pdf" target="_blank" style="color:rgb(17,85,204);font-size:small">https://halldweb.jlab.org/<wbr>DocDB/0029/002947/001/<wbr>MStaibCDCUpdateFeb2016.pdf</a><span style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><span> </span>slide 8</span><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><a class="gmail-m_-6969130007001837127moz-txt-link-freetext" href="https://halldweb.jlab.org/DocDB/0032/003229/001/MStaibAlignFeb2016Collab.pdf" target="_blank" style="color:rgb(17,85,204);font-size:small">https://halldweb.jlab.org/<wbr>DocDB/0032/003229/001/<wbr>MStaibAlignFeb2016Collab.pdf</a><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><a class="gmail-m_-6969130007001837127moz-txt-link-freetext" href="https://halldweb.jlab.org/DocDB/0030/003029/002/CDCUpdateMay2016.pdf" target="_blank" style="color:rgb(17,85,204);font-size:small">https://halldweb.jlab.org/<wbr>DocDB/0030/003029/002/<wbr>CDCUpdateMay2016.pdf</a><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><a class="gmail-m_-6969130007001837127moz-txt-link-freetext" href="https://halldweb.jlab.org/DocDB/0033/003310/001/MStaib16May2017AlignmentUpdate.pdf" target="_blank" style="color:rgb(17,85,204);font-size:small">https://halldweb.jlab.org/<wbr>DocDB/0033/003310/001/<wbr>MStaib16May2017AlignmentUpdate<wbr>.pdf</a><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><a class="gmail-m_-6969130007001837127moz-txt-link-freetext" href="https://halldweb.jlab.org/DocDB/0033/003393/001/mstaib_physics_2017.pdf" target="_blank" style="color:rgb(17,85,204);font-size:small">https://halldweb.jlab.org/<wbr>DocDB/0033/003393/001/mstaib_<wbr>physics_2017.pdf</a><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><span style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">This is the extent that I know how to do the alignment. Moving forward in the alignment, Simon needs to bring some variables from deep within the code to a higher level so that the alignment plugin can access them. This will allow MilliPede to handle another higher order correction. Curtis sent a paper to Mike and I about the problem a while ago. If you look at the invariant mass of the phi as a function of the difference of the kaon momenta, you'll see a smile. That means that when both kaons have the same momenta, you are at a minimum mass value for the phi. As one kaon has more momenta than the other, the mass of the phi shifts towards higher mass. If you look at a phi invariant mass normally, you'll notice the right side looks like it spreads a bit more than the left side. That's what this is from (I believe).<span> </span></span><br style="color:rgb(0,0,0);font-size:small;text-decoration-style:initial;text-decoration-color:initial"><br></div></div>