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<div dir="ltr">Hi all, </div>
<div dir="ltr">Also if we are talking about e/h separation below 2 GeV requiring 0.5 mrad angular resolution, the simulation need to be done with electrons also not only pions in these momentum ranges</div>
<div dir="ltr">Best regards </div>
<div dir="ltr">Kondo </div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Erd108 <erd108-bounces@jlab.org> on behalf of Kiselev, Alexander <ayk@bnl.gov><br>
<b>Sent:</b> Saturday, July 27, 2024 2:07:20 PM<br>
<b>To:</b> Sourav Tarafdar <stara@jlab.org><br>
<b>Cc:</b> erd108@jlab.org <erd108@jlab.org><br>
<b>Subject:</b> Re: [Erd108] [External] Re: Additional simulation request</font>
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Hi Sourav,</div>
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Perhaps. Though "to do" may have various meanings, and it is always good to have some redundancy and / or acceptance overlap in this PID business.</div>
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Cheers,</div>
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Alexander.</div>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Sourav Tarafdar <stara@jlab.org><br>
<b>Sent:</b> Saturday, July 27, 2024 1:34 PM<br>
<b>To:</b> Kiselev, Alexander <ayk@bnl.gov><br>
<b>Cc:</b> Nikolai Smirnov <nikolai.smirnov@yale.edu>; erd108@jlab.org <erd108@jlab.org><br>
<b>Subject:</b> Re: [Erd108] [External] Re: Additional simulation request</font>
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<div style="line-break:after-white-space">Hi Alexander,
<div><br>
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<div>Sure but based on simulation studies in ePIC framework under Magnetic field by Barrel EMCAL group they claim to do e/h separation down to 0.5 GeV. I seriously doubt we really need to focus at 0.5 mrad angular resolution below 2 GeV. </div>
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<div>Cheers,</div>
<div>Sourav<br id="x_x_lineBreakAtBeginningOfMessage">
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<div>On Jul 27, 2024, at 1:14 PM, Kiselev, Alexander <ayk@bnl.gov> wrote:</div>
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Hi Nikolai, Sourav,</div>
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I recall 0.5mrad for hpDIRC is mostly important at higher momenta (say 4-6 GeV/c), but this is true if we are only interested in pi/K separation. In case e/h separation is of interest as well, 0.5mrad requirement should be rescaled in terms of momentum range
to this mass hypothesis configuration.</div>
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Cheers,</div>
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Alexander.</div>
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<font face="Calibri, sans-serif" style="font-size:11pt"><b>From:</b><span class="x_x_Apple-converted-space"> </span>Erd108 <erd108-bounces@jlab.org> on behalf of Nikolai Smirnov <nikolai.smirnov@yale.edu><br>
<b>Sent:</b><span class="x_x_Apple-converted-space"> </span>Saturday, July 20, 2024 4:27 PM<br>
<b>To:</b><span class="x_x_Apple-converted-space"> </span>Sourav Tarafdar <stara@jlab.org><br>
<b>Cc:</b><span class="x_x_Apple-converted-space"> </span>erd108@jlab.org <erd108@jlab.org>; Shyam Kumar <shyam055119@gmail.com><br>
<b>Subject:</b><span class="x_x_Apple-converted-space"> </span>Re: [Erd108] [External] Re: Additional simulation request</font>
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<div dir="ltr">Dear Sourav, Kondo, and Matt.
<div>It is nice that you are going to check carefully tracking - DIRC performance in more details.</div>
<div>Previous experiments with DIRC included, demonstrate the result of the performance in (0.65-0.7 till 5.4.- 5.5) GeV/c limits.</div>
<div>So. data for P<2. will be available, it can be very useful for a cross-check with ToF data, and for e/h identification.</div>
<div>As you know the best EMCAL electron identification (E /P) started ~4.GeV/c. </div>
<div>So DIRC+ToF data can be crucial for smaller momentum, and (maybe) can be used as a TRIGGER.</div>
<div><br>
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<div>As Prakhar showed me the barrell setup, the R position of ToF is ~64 cm ( if I am not mistaken it was ~42 cm) and +/- 1.4 in rapidity..</div>
<div> Please check this simple arithmetics </div>
<div> Pt cut not to touch ToF = 0.3x1.7x0.64 = 0.33 GeV/c</div>
<div>It means Etha = 0. P (momentum) cut = 0.33</div>
<div> = 1. = 0.47</div>
<div> = 1.4 = 0.66</div>
<div>Now, check charge particle spectrum for different rapidiries from YR, and point these values by pencil.</div>
<div>What will be your conclusion? What %% of particles will be without PiD?</div>
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<div>Sourav, Thank you for your mail and phone message.</div>
<div>I hope to be on duty in a couple weeks. </div>
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<div>Best regards, Nikolai.</div>
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<div dir="ltr" class="x_x_x_gmail_attr">On Fri, Jul 19, 2024 at 11:18 AM Sourav Tarafdar <<a href="mailto:stara@jlab.org">stara@jlab.org</a>> wrote:<br>
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<div><span style="font-size:14px">Dear Nikolai,</span>
<div><span style="font-size:14px"><br>
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<div><span style="font-size:14px">Several questions just for clarification . </span></div>
<div><span style="font-size:14px">What is the definition of high and low momentum ? </span></div>
<div><span style="font-size:14px">What do you mean by ToF-R position is changed ? Changed from what to what ? </span></div>
<div><span style="font-size:14px">How are you getting the number of 30% for unavailable particle ?</span></div>
<div><span style="font-size:14px">I agree that magnetic field is unpleasant for particles of few hundred MeV but ToF has shown the capability of PID (e/pi) at less than 0.5 GeV in ePIC and as a reference here are the studies</span></div>
<div><span style="font-size:14px"> <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__indico.bnl.gov_event_17621_contributions_71751_subcontributions_2172_attachments_45491_76755_EPIC-5FTOF-5FSIM-5FCOLLAB.pdf&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=6nBhCQ9asnI7Gb72jBWQ4g&m=dNEN80LuFbYx4zYhK6bb_jAIeM_Zt6g72f74o0l3y2z_kqeq4IQv7x7WJW1ohYrR&s=wRM0l6ec4x1zpGxVoi2qlNlzSHXziojUAkvVBNxrAuA&e=" target="_blank">https://indico.bnl.gov/event/17621/contributions/71751/subcontributions/2172/attachments/45491/76755/EPIC_TOF_SIM_COLLAB.pdf</a></span></div>
<div><span style="font-size:14px">Also Matt can correct me but if I recall it was the input by DIRC group that they need 0.5 mrad over the entire momentum range .Their simulation studies has only shown their PID capability for pi/K @ 6 GeV and not from 1 GeV
from where it is supposed to do PID (may be I am wrong but would like to get reference of detailed DIRC simulation studies). </span></div>
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<div><span style="font-size:14px">Last but not least, wish you all the best for recovering soon , so no rush to reply to my questions !</span></div>
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<div><span style="font-size:14px">Best regards,</span></div>
<div><span style="font-size:14px">Sourav</span></div>
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<div>On Jul 18, 2024, at 6:59 PM, Nikolai Smirnov <<a href="mailto:nikolai.smirnov@yale.edu" target="_blank">nikolai.smirnov@yale.edu</a>> wrote:</div>
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<div dir="ltr">Dear Kondo, Matt, Sourav,
<div><br>
<div>Sorry that I am going once more to point something connected to PiD in barrell position.</div>
<div>Most probably you discussed all these comments before.</div>
<div><br>
</div>
<div>0. For any tracking / PID performance the "start" point - particle momentum spectrums for different rapidities from the Yellow report should be on a "front of you position."</div>
<div><br>
</div>
<div>1. DIRC.</div>
<div> -- The demand of 0.5 mrad tracking precision is a crucial factor for high momentum particle PID </div>
<div> -- It can / should be absolutely different for low momentum particles. See Cherenkov angle as a function of momentum. </div>
<div> -- But for low Pt the bending angle is an unpleasant factor.</div>
<div> --- Scattering (as you know) is more crucial for low momentum.</div>
<div>Check with a DIRC expert if it was not done earlier. </div>
<div><br>
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<div>2. ToF R - position was changed.</div>
<div> Please make a simple calculation and prepare for yourself the result - particle momentum cut (there is no chance to get PID) dure to 1.7T B-field as a function of the rapidity ( 0 -- 1,4), and check with P-spectrum.</div>
<div><br>
</div>
<div>3. And the same for DIRC and EMCAL.</div>
<div><br>
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<div>Are you sure that a declared Physics can be done if for ~30% of particles PID will not be available!?</div>
<div><br>
</div>
<div>It was sent from a medical recovery facility - so, take corrections. </div>
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<div>Best regards, Nikolai.</div>
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<div dir="ltr" class="x_x_x_gmail_attr">On Wed, Jul 17, 2024 at 11:26 AM Kondo Gnanvo <<a href="mailto:kagnanvo@jlab.org" target="_blank">kagnanvo@jlab.org</a>> wrote:<br>
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<div style="margin-top:0px; margin-bottom:0px">Hi Sourav,<span class="x_x_Apple-converted-space"> </span><u></u><u></u></div>
<div style="margin-top:0px; margin-bottom:0px">What is motivating the discussion of ToF going to 5%?<u></u><u></u></div>
<div style="margin-top:0px; margin-bottom:0px">Kondo<u></u><u></u></div>
<div style="margin-top:0px; margin-bottom:0px"><u></u> <u></u></div>
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<div style="margin-top:0px; margin-bottom:0px"><b>From:</b><span class="x_x_Apple-converted-space"> </span>Sourav Tarafdar <<a href="mailto:stara@jlab.org" target="_blank">stara@jlab.org</a>><br>
<b>Sent:</b><span class="x_x_Apple-converted-space"> </span>Wednesday, July 17, 2024 11:21 AM<br>
<b>To:</b><span class="x_x_Apple-converted-space"> </span>Matthew Posik <<a href="mailto:posik@temple.edu" target="_blank">posik@temple.edu</a>>; Kondo Gnanvo <<a href="mailto:kagnanvo@jlab.org" target="_blank">kagnanvo@jlab.org</a>>; Gnanvo, Kondo (kg6cq)
<<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>>;<span class="x_x_Apple-converted-space"> </span><a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a>; Shyam Kumar <<a href="mailto:shyam055119@gmail.com" target="_blank">shyam055119@gmail.com</a>><br>
<b>Subject:</b><span class="x_x_Apple-converted-space"> </span>Re: [Erd108] [External] Re: Additional simulation request<u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px"><u></u> <u></u></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Sure, I don't care about MPGD resolution. I wanted to stop the discussion of ToF going to 5% to further degrade the angular resolution from current ~ 3.5 mrad and
effectively making DIRC useless in low momentum region. <u></u><u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><b><span>From:</span></b><span><span class="x_x_Apple-converted-space"> </span>Erd108 <<a href="mailto:erd108-bounces@jlab.org" target="_blank">erd108-bounces@jlab.org</a>> on behalf of Matthew Posik <<a href="mailto:posik@temple.edu" target="_blank">posik@temple.edu</a>><br>
<b>Sent:</b><span class="x_x_Apple-converted-space"> </span>Wednesday, July 17, 2024 11:13 AM<br>
<b>To:</b><span class="x_x_Apple-converted-space"> </span>Kondo Gnanvo <<a href="mailto:kagnanvo@jlab.org" target="_blank">kagnanvo@jlab.org</a>>; Sourav Tarafdar <<a href="mailto:stara@jlab.org" target="_blank">stara@jlab.org</a>>; Gnanvo, Kondo (kg6cq) <<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>>;<span class="x_x_Apple-converted-space"> </span><a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a><span class="x_x_Apple-converted-space"> </span><<a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a>>;
Shyam Kumar <<a href="mailto:shyam055119@gmail.com" target="_blank">shyam055119@gmail.com</a>><br>
<b>Subject:</b><span class="x_x_Apple-converted-space"> </span>Re: [Erd108] [External] Re: Additional simulation request</span><u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px"> <u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Hi All,<u></u><u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos"><u></u> <u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Kondo is correct, the MPGD resolution does not help DIRC PID due to multiple scattering of the inner layers, even when the MPGD resolution is 50um. Adding the CF
support just worsens the resolutions. Additional material will further worsen the angular performance.<u></u><u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Thanks,<u></u><u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Matt<u></u><u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px; background:white"><span style="font-size:10pt; font-family:Arial,sans-serif; color:rgb(34,34,34)">Matt Posik<u></u><u></u></span></div>
<div style="margin-top:0px; margin-bottom:0px; background:white"><span style="font-size:10pt; font-family:Arial,sans-serif; color:rgb(34,34,34)">Research Associate Professor <u></u><u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px; background:white"><span style="font-size:10pt; font-family:Arial,sans-serif; color:rgb(34,34,34)">Temple University <u></u><u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><b><span>From:</span></b><span><span class="x_x_Apple-converted-space"> </span>Erd108 <<a href="mailto:erd108-bounces@jlab.org" target="_blank">erd108-bounces@jlab.org</a>> on behalf of Kondo Gnanvo <<a href="mailto:kagnanvo@jlab.org" target="_blank">kagnanvo@jlab.org</a>><br>
<b>Sent:</b><span class="x_x_Apple-converted-space"> </span>Wednesday, July 17, 2024 10:39 AM<br>
<b>To:</b><span class="x_x_Apple-converted-space"> </span>Sourav Tarafdar <<a href="mailto:stara@jlab.org" target="_blank">stara@jlab.org</a>>; Gnanvo, Kondo (kg6cq) <<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>>;<span class="x_x_Apple-converted-space"> </span><a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a><<a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a>>;
Shyam Kumar <<a href="mailto:shyam055119@gmail.com" target="_blank">shyam055119@gmail.com</a>><br>
<b>Subject:</b><span class="x_x_Apple-converted-space"> </span>[External] Re: [Erd108] Additional simulation request</span><u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px"> <u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px">Hi Sourav <u></u><u></u></div>
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<div>
<div style="margin-top:0px; margin-bottom:0px">Ok, i will let Matt comment. My main point is whether good spatial resolution MPGD helps achieving the angular resolution requirements at the DIRC. It looks like even before including the CF material, we could
not satisfy this requirement even with a 50um MPGD, so <u></u><u></u></div>
</div>
<div>
<ul type="disc">
<li class="x_x_x_MsoNormal" style="list-style-type:"- "">MPGD resolution does not help because multiple scattering of the inner layers is dominant factor<u></u><u></u></li><li class="x_x_x_MsoNormal" style="list-style-type:"- "">0.5 mrad angular resolution requirements not met even before considering CF support structure <u></u><u></u></li></ul>
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<div style="margin-top:0px; margin-bottom:0px">Maybe I am wrong though! <u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px">Best regards <u></u><u></u></div>
</div>
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<div style="margin-top:0px; margin-bottom:0px">Kondo<u></u><u></u></div>
</div>
</div>
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<div style="margin-top:0px; margin-bottom:0px"><b><span>From:</span></b><span><span class="x_x_Apple-converted-space"> </span>Sourav Tarafdar <<a href="mailto:stara@jlab.org" target="_blank">stara@jlab.org</a>><br>
<b>Sent:</b><span class="x_x_Apple-converted-space"> </span>Wednesday, July 17, 2024 10:27:32 AM<br>
<b>To:</b><span class="x_x_Apple-converted-space"> </span>Kondo Gnanvo <<a href="mailto:kagnanvo@jlab.org" target="_blank">kagnanvo@jlab.org</a>>; Gnanvo, Kondo (kg6cq) <<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>>;<a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a><span class="x_x_Apple-converted-space"> </span><<a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a>>;
Shyam Kumar <<a href="mailto:shyam055119@gmail.com" target="_blank">shyam055119@gmail.com</a>><br>
<b>Subject:</b><span class="x_x_Apple-converted-space"> </span>Re: Additional simulation request</span><u></u><u></u></div>
<div>
<div style="margin-top:0px; margin-bottom:0px"> <u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Hi Kondo,<u></u><u></u></span></div>
</div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos"><u></u> <u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Just during Monday simulation meeting Matt showed series of studies. Slide 15 in Matt's presentation concludes the effect of CF affects the angular resolution significantly,
if I am not mistaken in final conclusion during that presentation ? <u></u><u></u></span></div>
</div>
<div>
<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos"><u></u> <u></u></span></div>
</div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Regards,<u></u><u></u></span></div>
</div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Sourav <u></u><u></u></span></div>
</div>
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<hr size="3" width="98%" align="center">
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<div style="margin-top:0px; margin-bottom:0px"><b><span>From:</span></b><span><span class="x_x_Apple-converted-space"> </span>Erd108 <<a href="mailto:erd108-bounces@jlab.org" target="_blank">erd108-bounces@jlab.org</a>> on behalf of Kondo Gnanvo <<a href="mailto:kagnanvo@jlab.org" target="_blank">kagnanvo@jlab.org</a>><br>
<b>Sent:</b><span class="x_x_Apple-converted-space"> </span>Wednesday, July 17, 2024 10:23 AM<br>
<b>To:</b><span class="x_x_Apple-converted-space"> </span>Sourav Tarafdar <<a href="mailto:stara@jlab.org" target="_blank">stara@jlab.org</a>>; Gnanvo, Kondo (kg6cq) <<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>>;<span class="x_x_Apple-converted-space"> </span><a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a><<a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a>>;
Shyam Kumar <<a href="mailto:shyam055119@gmail.com" target="_blank">shyam055119@gmail.com</a>><br>
<b>Subject:</b><span class="x_x_Apple-converted-space"> </span>Re: [Erd108] Additional simulation request</span><u></u><u></u></div>
<div>
<div style="margin-top:0px; margin-bottom:0px"> <u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px">Hi Sourav, <u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px">The spatial resolution was already irrelevant even before considering the CF material if i remember well from past studies. <u></u><u></u></div>
</div>
<div>
<div style="margin-top:0px; margin-bottom:0px">I don’t remember a simulation study that ever show any impact of MPGD resolution on the angular resolution at the DIRC level <u></u><u></u></div>
</div>
<div>
<div style="margin-top:0px; margin-bottom:0px">Best regards <u></u><u></u></div>
</div>
<div>
<div style="margin-top:0px; margin-bottom:0px">Kondo <u></u><u></u></div>
</div>
</div>
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<div style="margin-top:0px; margin-bottom:0px"><b><span>From:</span></b><span><span class="x_x_Apple-converted-space"> </span>Erd108 <<a href="mailto:erd108-bounces@jlab.org" target="_blank">erd108-bounces@jlab.org</a>> on behalf of Sourav Tarafdar <<a href="mailto:stara@jlab.org" target="_blank">stara@jlab.org</a>><br>
<b>Sent:</b><span class="x_x_Apple-converted-space"> </span>Wednesday, July 17, 2024 10:11:36 AM<br>
<b>To:</b><span class="x_x_Apple-converted-space"> </span>Gnanvo, Kondo (kg6cq) <<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>>;<span class="x_x_Apple-converted-space"> </span><a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a><span class="x_x_Apple-converted-space"> </span><<a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a>>;
Shyam Kumar <<a href="mailto:shyam055119@gmail.com" target="_blank">shyam055119@gmail.com</a>><br>
<b>Subject:</b><span class="x_x_Apple-converted-space"> </span>Re: [Erd108] Additional simulation request</span><u></u><u></u></div>
<div>
<div style="margin-top:0px; margin-bottom:0px"> <u></u><u></u></div>
</div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Hi Kondo,<u></u><u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos"><u></u> <u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">I thought it was 3% Carbon fiber support structure causing multiple scattering which was basically making spatial resolution of MPGD irrelevant ?<u></u><u></u></span></div>
</div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos"><u></u> <u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Regards,<u></u><u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt; font-family:Aptos">Sourav<u></u><u></u></span></div>
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<div style="margin-top:0px; margin-bottom:0px"><b><span>From:</span></b><span><span class="x_x_Apple-converted-space"> </span>Gnanvo, Kondo (kg6cq) <<a href="mailto:kg6cq@virginia.edu" target="_blank">kg6cq@virginia.edu</a>><br>
<b>Sent:</b><span class="x_x_Apple-converted-space"> </span>Wednesday, July 17, 2024 10:07 AM<br>
<b>To:</b><span class="x_x_Apple-converted-space"> </span>Sourav Tarafdar <<a href="mailto:stara@jlab.org" target="_blank">stara@jlab.org</a>>;<span class="x_x_Apple-converted-space"> </span><a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a><span class="x_x_Apple-converted-space"> </span><<a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a>>;
Shyam Kumar <<a href="mailto:shyam055119@gmail.com" target="_blank">shyam055119@gmail.com</a>><br>
<b>Subject:</b><span class="x_x_Apple-converted-space"> </span>[EXTERNAL] RE: Additional simulation request</span><u></u><u></u></div>
<div>
<div style="margin-top:0px; margin-bottom:0px"> <u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px">Hi Sourav,<span class="x_x_Apple-converted-space"> </span><u></u><u></u></div>
<div style="margin-top:0px; margin-bottom:0px">It looks like the material budget already the dominant parameter for the angular resolution study at the DIRC level so it seems very unlikely that there would be any difference between 1% and 5% for the TOF layer<u></u><u></u></div>
<div style="margin-top:0px; margin-bottom:0px">Best regards<span class="x_x_Apple-converted-space"> </span><u></u><u></u></div>
<div style="margin-top:0px; margin-bottom:0px">Kondo<u></u><u></u></div>
<div style="margin-top:0px; margin-bottom:0px"> <u></u><u></u></div>
<div>
<div style="border-width:1pt medium medium; border-style:solid none none; border-color:rgb(225,225,225) currentcolor currentcolor; padding:3pt 0in 0in">
<div style="margin-top:0px; margin-bottom:0px"><b>From:</b><span class="x_x_Apple-converted-space"> </span>Erd108 <<a href="mailto:erd108-bounces@jlab.org" target="_blank">erd108-bounces@jlab.org</a>><span class="x_x_Apple-converted-space"> </span><b>On Behalf
Of<span class="x_x_Apple-converted-space"> </span></b>Sourav Tarafdar<br>
<b>Sent:</b><span class="x_x_Apple-converted-space"> </span>Wednesday, July 17, 2024 9:55 AM<br>
<b>To:</b><span class="x_x_Apple-converted-space"> </span><a href="mailto:erd108@jlab.org" target="_blank">erd108@jlab.org</a>; Shyam Kumar <<a href="mailto:shyam055119@gmail.com" target="_blank">shyam055119@gmail.com</a>><br>
<b>Subject:</b><span class="x_x_Apple-converted-space"> </span>[Erd108] Additional simulation request<u></u><u></u></div>
</div>
</div>
<div style="margin-top:0px; margin-bottom:0px"> <u></u><u></u></div>
<div>
<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt">Dear all ,</span><u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt"> </span><u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt">The request is mostly directed towards Matt and Shyam. I am wondering if it is possible to quickly do additional study on angular resolution @ DIRC location by increasing the material
budget of barrel ToF from current 1.0% to 5.0% ? There has been chatter about increasing the material budget of ToF to 5.0% and before it takes a lead it will be good to know it's effect . Based on results shown in the Monday meeting I suppose it will further
deteriorate angular resolution at DIRC. Also considering Shyam's method I think the analytical simulation method by Shyam will be good enough if DD4HEP sim is time taking. </span><u></u><u></u></div>
</div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt"> </span><u></u><u></u></div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt">Cheers,</span><u></u><u></u></div>
</div>
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<div style="margin-top:0px; margin-bottom:0px"><span style="font-size:12pt">Sourav</span><u></u><u></u></div>
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