<div dir="ltr"><br><div class="gmail_quote"><div dir="ltr">Hello Elton,<div><br></div><div>Yes, and when I saw the evidence for this that was when I added a separate tag in the hddm output from the simulations (both of them) containing this information. What I just learned from Sean is that this additional tag for the FCal lucite light yield is presently being ignored in mcsmear.</div><div><br></div><div>-Richard J.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 13, 2019 at 4:14 PM Elton Smith <<a href="mailto:elton@jlab.org" target="_blank">elton@jlab.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Richard,<br>
We have learned in studies for CPP that when charged tracks pass through <br>
the light guide (immediately in front of the PMT) they can produce <br>
sufficient light to make a difference in the response to pions. So even <br>
though on the surface this does not seem like an important effect, it <br>
can make a difference for mininum ionizing hadrons.<br>
<br>
Thanks, Elton.<br>
<br>
Elton Smith<br>
Jefferson Lab MS 12H3<br>
12000 Jefferson Ave STE 4<br>
Newport News, VA 23606<br>
(757)269-7625<br>
(757)269-6331 fax<br>
<br>
On 3/13/19 1:44 PM, Richard Jones wrote:<br>
> Ilya,<br>
><br>
> We just learned that the combination of lead glass and lucite <br>
> contributions to the light yield is a particularly simple one, with <br>
> the coefficients of the lucite part being zero.<br>
><br>
> -Richard<br>
><br>
> On Wed, Mar 13, 2019 at 1:41 PM Sean Dobbs <<a href="mailto:sdobbs@fsu.edu" target="_blank">sdobbs@fsu.edu</a> <br>
> <mailto:<a href="mailto:sdobbs@fsu.edu" target="_blank">sdobbs@fsu.edu</a>>> wrote:<br>
><br>
> Hi Richard,<br>
><br>
> One correction: by default the energy deposited in the light guides<br>
> is not added to the main block energy in mcsmear, because its effect<br>
> has not yet been studied in detail.<br>
><br>
> ---Sean<br>
><br>
> On Wed, Mar 13, 2019 at 1:38 PM Richard Jones<br>
> <<a href="mailto:richard.t.jones@uconn.edu" target="_blank">richard.t.jones@uconn.edu</a> <mailto:<a href="mailto:richard.t.jones@uconn.edu" target="_blank">richard.t.jones@uconn.edu</a>>> wrote:<br>
> ><br>
> > Hello Ilya,<br>
> ><br>
> > I agree, although I want to add the light is generated<br>
> separately in the lead glass blocks and the lucite light guides,<br>
> in the MC simulation. These two are combined into a single light<br>
> output in mcsmear, in a treatment that is the same for both<br>
> hdgeant and hdgeant4.<br>
> ><br>
> > -Richard J.<br>
> ><br>
> > On Wed, Mar 13, 2019 at 12:58 PM Ilya Larin <<a href="mailto:ilarin@jlab.org" target="_blank">ilarin@jlab.org</a><br>
> <mailto:<a href="mailto:ilarin@jlab.org" target="_blank">ilarin@jlab.org</a>>> wrote:<br>
> >><br>
> >><br>
> >> Hi Liping,<br>
> >><br>
> >><br>
> >> I guess final linearity corrections might be involved in<br>
> >><br>
> >> mcsmear and reconstruction to explain the observed<br>
> >><br>
> >> positive deviation in reconstructed energy at high energy end.<br>
> >><br>
> >> I don't think it is an effect of light guides or limited<br>
> >> transparency of the blocks.<br>
> >><br>
> >> Regards,<br>
> >> Ilya<br>
> >><br>
> >> ________________________________<br>
> >> От: Gan, Liping <<a href="mailto:ganl@uncw.edu" target="_blank">ganl@uncw.edu</a> <mailto:<a href="mailto:ganl@uncw.edu" target="_blank">ganl@uncw.edu</a>>><br>
> >> Отправлено: 13 марта 2019 г. 12:50<br>
> >> Кому: Richard Jones; Ilya Larin<br>
> >> Копия: Liping Gan; Matthew Shepherd; <a href="mailto:halld-cal@jlab.org" target="_blank">halld-cal@jlab.org</a><br>
> <mailto:<a href="mailto:halld-cal@jlab.org" target="_blank">halld-cal@jlab.org</a>><br>
> >> Тема: Re: updated study of Fcal response in MC<br>
> >><br>
> >><br>
> >> Hi, Richard,<br>
> >><br>
> >><br>
> >> In your result, the energy deviation for the reconstructed<br>
> photon in FCAL reaches more than 100 MeV. I would like to ask Ilya<br>
> to comment on this since he has done a lot of simulations on<br>
> calorimeter.<br>
> >><br>
> >><br>
> >> Liping<br>
> >><br>
> >><br>
> >><br>
> >> ________________________________<br>
> >> From: Richard Jones <<a href="mailto:richard.t.jones@uconn.edu" target="_blank">richard.t.jones@uconn.edu</a><br>
> <mailto:<a href="mailto:richard.t.jones@uconn.edu" target="_blank">richard.t.jones@uconn.edu</a>>><br>
> >> Sent: Tuesday, March 12, 2019 2:16 PM<br>
> >> To: Gan, Liping<br>
> >> Cc: Liping Gan; Matthew Shepherd; <a href="mailto:halld-cal@jlab.org" target="_blank">halld-cal@jlab.org</a><br>
> <mailto:<a href="mailto:halld-cal@jlab.org" target="_blank">halld-cal@jlab.org</a>><br>
> >> Subject: Re: updated study of Fcal response in MC<br>
> >><br>
> >> Hello Liping,<br>
> >><br>
> >> The response of the calorimeter itself in the MC does not have<br>
> these two inflection points that you see in these plots. Those are<br>
> coming from the interaction between the non-linear response in the<br>
> simulation coupled with the (non-equivalent) non-linear<br>
> corrections being applied in mcsmear and the cluster energy<br>
> reconstruction. This plot shows the net effect of all 3 (MC +<br>
> mcsmear + recon).<br>
> >><br>
> >> -Richard<br>
> >><br>
> >> On Tue, Mar 12, 2019 at 1:13 PM Gan, Liping <<a href="mailto:ganl@uncw.edu" target="_blank">ganl@uncw.edu</a><br>
> <mailto:<a href="mailto:ganl@uncw.edu" target="_blank">ganl@uncw.edu</a>>> wrote:<br>
> >><br>
> >> Hi, Richard,<br>
> >><br>
> >><br>
> >> Thanks for the excellent result. I just wonder if there is any<br>
> explanation for the small bump at 1.5-2.5 GeV in you plots? Thanks!<br>
> >><br>
> >><br>
> >> Liping<br>
> >><br>
> >> ________________________________<br>
> >> From: Richard Jones <<a href="mailto:richard.t.jones@uconn.edu" target="_blank">richard.t.jones@uconn.edu</a><br>
> <mailto:<a href="mailto:richard.t.jones@uconn.edu" target="_blank">richard.t.jones@uconn.edu</a>>><br>
> >> Sent: Tuesday, March 12, 2019 10:37:29 AM<br>
> >> To: Liping Gan; Matthew Shepherd<br>
> >> Cc: <a href="mailto:halld-cal@jlab.org" target="_blank">halld-cal@jlab.org</a> <mailto:<a href="mailto:halld-cal@jlab.org" target="_blank">halld-cal@jlab.org</a>><br>
> >> Subject: updated study of Fcal response in MC<br>
> >><br>
> >> Hello Liping and all,<br>
> >><br>
> >> At your suggestion, I went back and redid my study of<br>
> reconstructed showers in the FCAL from MC, comparing hdgeant and<br>
> hdgeant4, this time covering a larger energy range up to 8 GeV.<br>
> For the results, see the latest document uploaded to docdb.<br>
> >><br>
> >><br>
> <a href="https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhalldweb.jlab.org%2Fdoc-private%2FDocDB%2FShowDocument%3Fdocid%3D3852&data=02%7C01%7Challd-cal%40jlab.org%7C3d9cb12b7dfa47411d1c08d6a7fde092%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636881106178489545&sdata=p1ZLQXIpVCn6q92b49iUX9n4I0PqHTdnVpZW4LZlTSU%3D&reserved=0" originalSrc="https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=3852" shash="t/oDa94tOCUA29Ubher53n3CFUYu8Ph6971ux1y7VTYSzcDqotqybpEgNgA6qwo7FiqoevEbnq3HXAO8WWE08Xkr1xSGoSsiiSNo6zYJzKbD5pIBUoLqvF8dqd/RFcwroSTsa6mt9M9oXzIh5fBhgt5GuLa1FtnrFs7ff0wHAxM=" rel="noreferrer" target="_blank">https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhalldweb.jlab.org%2Fdoc-private%2FDocDB%2FShowDocument%3Fdocid%3D3852&data=02%7C01%7Crichard.t.jones%40uconn.edu%7Cc26ad56e213242a72b5208d6a7f08c17%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C0%7C636881048917528703&sdata=QfnUcygesaumyk8M0A9TSnFHqc6jbAy%2FprXxA1VyWMY%3D&reserved=0</a><br>
> <<a href="https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhalldweb.jlab.org%2Fdoc-private%2FDocDB%2FShowDocument%3Fdocid%3D3852&data=02%7C01%7Challd-cal%40jlab.org%7C3d9cb12b7dfa47411d1c08d6a7fde092%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636881106178499550&sdata=%2F3%2BM8l5dPtGJ1QWIw70x%2BTHNGOm6lkCqsCmMX8eV2%2BA%3D&reserved=0" originalSrc="https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=3852" shash="ncNcmNHs7AXidswjAma+dTgNK435qh9tefv5CTNFloj5vAiJDpbQVZiDEs2GZxNEr3mx/2PDRsxS801jl2AhpIQlFmlTKASWtGklkmAI/i4novcBS9gEy2l9CZqxhQ403KdzeEml3nh+asGkh18CkyV+7x7FV2WLAQjQPN1NUkM=" rel="noreferrer" target="_blank">https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fhalldweb.jlab.org%2Fdoc-private%2FDocDB%2FShowDocument%3Fdocid%3D3852&data=02%7C01%7Crichard.t.jones%40uconn.edu%7Cc26ad56e213242a72b5208d6a7f08c17%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C0%7C636881048917528703&sdata=QfnUcygesaumyk8M0A9TSnFHqc6jbAy%2FprXxA1VyWMY%3D&reserved=0</a>><br>
> >><br>
> >> Here is a summary of what I found.<br>
> >><br>
> >> I found a small bug in my fitting code that shifted the<br>
> Ereconstructed down by 16 MeV relative to the generated in my<br>
> earlier studies. This made the negative y-intercept in the<br>
> Ereconstructed vs Egenerated appear worse than it actually is.<br>
> >> I adjusted the output from shower particles in hdgeant4<br>
> relative to hdgeant down by 0.8% as we discussed a the last<br>
> calorimeter meeting. This change is visible in the new results. I<br>
> now claim that the agreement in the shower energy response between<br>
> hdgeant and hdgeant4 is very good.<br>
> >> With the new larger simulated energy range, my statistics of<br>
> 100K events total is limiting my statistical accuracy in studying<br>
> the non-linearity. Since there is no visible variation with polar<br>
> angle seen in these individual plots, I added at the end a plot<br>
> with the full statistics over the range 3-11 degrees, which has<br>
> less statistical scatter and reveals the nonlinear behavior better.<br>
> >> Above 4 GeV there is a very large rise in the reconstructed<br>
> energy. Overall the nonlinear correction needs work at both the<br>
> low and high energy ends of the Fcal spectrum.<br>
> >><br>
> >> -Richard Jones<br>
> ><br>
> > _______________________________________________<br>
> > Halld-cal mailing list<br>
> > <a href="mailto:Halld-cal@jlab.org" target="_blank">Halld-cal@jlab.org</a> <mailto:<a href="mailto:Halld-cal@jlab.org" target="_blank">Halld-cal@jlab.org</a>><br>
> ><br>
> <a href="https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__mailman.jlab.org_mailman_listinfo_halld-2Dcal%26d%3DDwICAg%26c%3DHPMtquzZjKY31rtkyGRFnQ%26r%3DbxTPW7N21WY8eJ2MkW85CQ%26m%3DbouDUuc6DyFXdu5NFXB5Z9lKF6BEkByPb1KeQQSg7OQ%26s%3D8SkCF38MWuPDef6OIjS0x2dCrljm_jf7sqkd73-ZY8s%26e&data=02%7C01%7Challd-cal%40jlab.org%7C3d9cb12b7dfa47411d1c08d6a7fde092%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636881106178499550&sdata=SQzCdNWBaS%2FRyBTAX8VjVcuciMSYjxEaATusp8isjeY%3D&reserved=0" originalSrc="https://urldefense.proofpoint.com/v2/url?u=https-3A__mailman.jlab.org_mailman_listinfo_halld-2Dcal&d=DwICAg&c=HPMtquzZjKY31rtkyGRFnQ&r=bxTPW7N21WY8eJ2MkW85CQ&m=bouDUuc6DyFXdu5NFXB5Z9lKF6BEkByPb1KeQQSg7OQ&s=8SkCF38MWuPDef6OIjS0x2dCrljm_jf7sqkd73-ZY8s&e" shash="o58pe9IpdGyjJlr2tK4ylKq9r28BB5tZh/uNSyELZNMx8Fp5WYIro+15yw8stLmG/RXBE9JgcCT+TktfbE3ybp//fpABVCqe3RMSU4ajk/e9LYT8oqf3AJ26JOOi6Nt160hCcrsty/UbU0BFm6lwahbALzE7OH9XmonVnHRDfdA=" rel="noreferrer" target="_blank">https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__mailman.jlab.org_mailman_listinfo_halld-2Dcal%26d%3DDwICAg%26c%3DHPMtquzZjKY31rtkyGRFnQ%26r%3DbxTPW7N21WY8eJ2MkW85CQ%26m%3DbouDUuc6DyFXdu5NFXB5Z9lKF6BEkByPb1KeQQSg7OQ%26s%3D8SkCF38MWuPDef6OIjS0x2dCrljm_jf7sqkd73-ZY8s%26e&data=02%7C01%7Crichard.t.jones%40uconn.edu%7Cc26ad56e213242a72b5208d6a7f08c17%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C0%7C636881048917528703&sdata=%2B2Z1sTv5ZFGhcAztaDo6%2Bbf%2BfLelFPFlAoWHTisfq1U%3D&reserved=0=</a><br>
> <<a href="https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__mailman.jlab.org_mailman_listinfo_halld-2Dcal%26d%3DDwICAg%26c%3DHPMtquzZjKY31rtkyGRFnQ%26r%3DbxTPW7N21WY8eJ2MkW85CQ%26m%3DbouDUuc6DyFXdu5NFXB5Z9lKF6BEkByPb1KeQQSg7OQ%26s%3D8SkCF38MWuPDef6OIjS0x2dCrljm_jf7sqkd73-ZY8s%26e&data=02%7C01%7Challd-cal%40jlab.org%7C3d9cb12b7dfa47411d1c08d6a7fde092%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636881106178509559&sdata=PgkkZeGEYM%2FCrIG7iVULDMjno4SBuEr0va9G9Uxe2RI%3D&reserved=0" originalSrc="https://urldefense.proofpoint.com/v2/url?u=https-3A__mailman.jlab.org_mailman_listinfo_halld-2Dcal&d=DwICAg&c=HPMtquzZjKY31rtkyGRFnQ&r=bxTPW7N21WY8eJ2MkW85CQ&m=bouDUuc6DyFXdu5NFXB5Z9lKF6BEkByPb1KeQQSg7OQ&s=8SkCF38MWuPDef6OIjS0x2dCrljm_jf7sqkd73-ZY8s&e" shash="uuhRbBmPDVA78rBSrNCitmKwmu5iqPm9CfJ4GvDMCwyEbjG7fm6v9yHAyaLB27cm5Fikn3cNFknxAfsT9oCHVgz8xtH63hbCJHpAALjk5t341dELhtzQLH2cWmP0A34VNY43vpJ8INHzpy6V3ywjgJRRq55jeh1JOaLE5JbDYnE=" rel="noreferrer" target="_blank">https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Furldefense.proofpoint.com%2Fv2%2Furl%3Fu%3Dhttps-3A__mailman.jlab.org_mailman_listinfo_halld-2Dcal%26d%3DDwICAg%26c%3DHPMtquzZjKY31rtkyGRFnQ%26r%3DbxTPW7N21WY8eJ2MkW85CQ%26m%3DbouDUuc6DyFXdu5NFXB5Z9lKF6BEkByPb1KeQQSg7OQ%26s%3D8SkCF38MWuPDef6OIjS0x2dCrljm_jf7sqkd73-ZY8s%26e&data=02%7C01%7Crichard.t.jones%40uconn.edu%7Cc26ad56e213242a72b5208d6a7f08c17%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C0%7C636881048917528703&sdata=%2B2Z1sTv5ZFGhcAztaDo6%2Bbf%2BfLelFPFlAoWHTisfq1U%3D&reserved=0</a>><br>
><br>
><br>
><br>
> _______________________________________________<br>
> Halld-cal mailing list<br>
> <a href="mailto:Halld-cal@jlab.org" target="_blank">Halld-cal@jlab.org</a><br>
> <a href="https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmailman.jlab.org%2Fmailman%2Flistinfo%2Fhalld-cal&data=02%7C01%7Challd-cal%40jlab.org%7C3d9cb12b7dfa47411d1c08d6a7fde092%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636881106178519569&sdata=Vs8TZhj%2Bxvly2gIbn%2BPV%2F3AetjPCgDkm5zzdhQQH02E%3D&reserved=0" originalSrc="https://mailman.jlab.org/mailman/listinfo/halld-cal" shash="XjpVLxKj1z5Xp6j3jjJzJwPfBQLe6d4sERqxBHVT0Rjv9Hwuxh/d+XtNN3NrYmpVvSg726YHdvSXpzMr+7UZHm+O6eb/zsbll7rohbUh7qVuAZaR6f6WQxuTLNccksd3ypig5HYnOD6Pr6LmkGxsVwCYcEs9HdfROJJZlhQh1ZM=" rel="noreferrer" target="_blank">https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmailman.jlab.org%2Fmailman%2Flistinfo%2Fhalld-cal&data=02%7C01%7Crichard.t.jones%40uconn.edu%7Cc26ad56e213242a72b5208d6a7f08c17%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C0%7C636881048917528703&sdata=0jXMAQ8SIduHWWxPR1Q7bJ6lfrFjF%2F6ZfQA6CmEbjEI%3D&reserved=0</a><br>
<br>
_______________________________________________<br>
Halld-cal mailing list<br>
<a href="mailto:Halld-cal@jlab.org" target="_blank">Halld-cal@jlab.org</a><br>
<a href="https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmailman.jlab.org%2Fmailman%2Flistinfo%2Fhalld-cal&data=02%7C01%7Challd-cal%40jlab.org%7C3d9cb12b7dfa47411d1c08d6a7fde092%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636881106178519569&sdata=Vs8TZhj%2Bxvly2gIbn%2BPV%2F3AetjPCgDkm5zzdhQQH02E%3D&reserved=0" originalSrc="https://mailman.jlab.org/mailman/listinfo/halld-cal" shash="XjpVLxKj1z5Xp6j3jjJzJwPfBQLe6d4sERqxBHVT0Rjv9Hwuxh/d+XtNN3NrYmpVvSg726YHdvSXpzMr+7UZHm+O6eb/zsbll7rohbUh7qVuAZaR6f6WQxuTLNccksd3ypig5HYnOD6Pr6LmkGxsVwCYcEs9HdfROJJZlhQh1ZM=" rel="noreferrer" target="_blank">https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmailman.jlab.org%2Fmailman%2Flistinfo%2Fhalld-cal&data=02%7C01%7Crichard.t.jones%40uconn.edu%7Cc26ad56e213242a72b5208d6a7f08c17%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C0%7C636881048917538708&sdata=iY13LmhCjsdUgqnZDufyusu8Cit8v1zHycx%2FffHPFmE%3D&reserved=0</a></blockquote></div>
</div></div>