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<font size="2">Hi Hovanes,<br>
with my naive plugin looking at tagger time minus RF time I see a
sigma of about 400ps.<br>
nothing sophisticated to optimize the result.<br>
I see similar sigmas for the PS tiles times where I use the PS
coarse counters as time reference.<br>
Also, the PS tiles do not have TDCs only fADCs.<br>
<br>
cheers,<br>
Beni<br>
</font><br>
<div class="moz-cite-prefix">On 10/16/25 19:02, Hovanes Egiyan
wrote:<br>
</div>
<blockquote type="cite" cite="mid:CALNwzVQs2yFtLzB+WvokuLxC7pje04b_z3KWbvnoWt721-9XfA@mail.gmail.com">
<div dir="ltr">Hi Beni,
<div><br>
</div>
<div>Thanks for the nice pictures. </div>
<div><br>
</div>
<div>GlueX NIM paper quotes 230ps for the timing resolution for
TAGM.</div>
<div><br>
</div>
<div>Best, </div>
<div> Hovanes. </div>
</div>
<br>
<div class="gmail_quote gmail_quote_container">
<div dir="ltr" class="gmail_attr">On Thu, Oct 16, 2025 at
4:06 PM zihlmann via Halld-tagger <<a href="mailto:halld-tagger@jlab.org" moz-do-not-send="true" class="moz-txt-link-freetext">halld-tagger@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">
<div> <a style="color:rgb(0,0,0);font-family:"Times New Roman";font-size:medium;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;white-space:normal;text-decoration-style:initial;text-decoration-color:initial" moz-do-not-send="true"> </a><a style="color:rgb(0,0,0);font-family:"Times New Roman";font-size:medium;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;white-space:normal;text-decoration-style:initial" moz-do-not-send="true"> <br>
Hi All,<br>
<br>
I added several more pictures and "movies" to the photo
album of the tagger microscope:<br>
https://photos.app.goo.gl/Q9To4SutT7854mmV6<br>
I highlighted a few points with three picked out pictures
(see attached pdf file)<br>
With the green laser shining into the front face of the
scintillator one can nicely see<br>
where the "losses" are in the fiber front face, in the
fused section and along the light guide.<br>
<br>
In addition, I looked at the timing resolution of the pair
spectrometer tiles and I find in <br>
my quick and dirty approach very similar timing
resolutions as for tagger microscope<br>
of order 300ps.<br>
<br>
cheers,<br>
Beni<br>
<br>
<br>
<br>
<br>
</a> </div>
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