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<p class="MsoNormal"><span style="font-size:11.0pt">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Maybe this was obvious to everybody but me, but for those who wanted to Zoom into this seminar today (at 11 AM Eastern), the Zoom link is at the bottom of this webpage:
<a href="https://www.jlab.org/conference/heraeus-conamic-seminar">https://www.jlab.org/conference//heraeus-conamic-seminar</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">or directly at: <a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1613927452-3Fpwd-3DOEhLL05XMU96QkRMMCttRFZERmJGZz09-26from-3Daddon&d=DwMF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=k2-3YiXM4PG72x9M5ma_2Q&m=X5Qn7XOHELZSeQRjf_vWw7fbk-hsRHfQGFBQpG18Lj3JnA6nGibkD72pztYNoSaN&s=fcw1Z-a15wH4a1583RQcD0WtwYyWH-N0G6YN7sOXAi0&e=">
https://jlab-org.zoomgov.com/j/1613927452?pwd=OEhLL05XMU96QkRMMCttRFZERmJGZz09&from=addon</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Mark<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">Moller <moller-bounces@jlab.org> on behalf of Carl Zorn via Moller <moller@jlab.org><br>
<b>Date: </b>Wednesday, April 10, 2024 at 11:52 AM<br>
<b>To: </b>moller@jlab.org <moller@jlab.org><br>
<b>Subject: </b>[Moller] Upcoming seminar on radiation-hard fused silica for MOLLER<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Wednesday, April 10, 2024</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Greetings to all. Back in early March, I put forward the possibility of a seminar by representatives from Heraeus Conamic on developing radiation-hard fused silica. Originally, this was for a project at
the LHC, but MOLLER will also be using some of this material in its main detectors.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’m pleased to announce that JLAB will be hosting a seminar on Monday, April 22, 2024, in room F326/327 of CEBAF Center from 11:00 am – 12:00 noon. Zoom coordinates will be provided, and I’m hoping to make
a recording of the seminar for those who cannot attend, either in person or remotely at the time. A general announcement is forthcoming in the JLAB news distribution.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Here’s the key information on the seminar:</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><b> Fused silica challenges in radiation-hard environments</b><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Presenters: Dr. Frank Nürnberg and Wolfgang Schlichting, Heraeus Conamic</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt">Many modern experiments in nuclear and particle physics must consider the radiation tolerance of various materials used in the detectors. The upcoming MOLLER experiment at Jefferson Laboratory will use
a large amount of fused silica as a key component in the main detectors. Dr. Frank Nürnberg and Wolfgang Schlichting of Heraeus Conamic will present a seminar on the work of Heraeus Conamic to address the issue of radiation hardness for fused silica. Some
of the most highly irradiated portions of the MOLLER detectors will use a specially formulated version of fused silica originally developed by Heraeus Conamic for application at the LHC**.</span></i><o:p></o:p></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt"> </span></i><o:p></o:p></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt">As technology improves almost yearly, fused silica constantly faces new challenges. However, due to its extremely high chemical purity, it is still the material of choice for optical applications in radiation-hard
environments. Just to name a few: (i) cosmic radiation and solarization topics for satellites or space telescopes, (ii) laser-induced damage threshold levels in material processing or demanding scientific laser systems, and (iii) transmission loss in optical
components close the particle beams in accelerator structures. While presenting a guided tour of the production process of fused silica, the optical properties of fused silica will be described, and the challenges of different applications will be presented.
Parameters such as optical homogeneity, bubble content, absorption, and radiation damage in fused silica will be discussed and the advantages of fused silica will be discussed. The focus is placed on JLAB’s relevant topics via past application examples: Cherenkov
light guidance in fused silica and the related recent damage tests at the LHC.</span></i><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">**https://doi.org/10.1016/j.nima.2023.168523</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">S. Yang et al., Nuclear Instruments and Methods in Physics Research, A 1055 (2023) 168523</span><o:p></o:p></p>
<p class="MsoNormal"><i><span style="font-size:11.0pt">Optical Transmission characterization of fused silica materials irradiated at the CERN Large Hadron Collider.</span></i><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">All the best,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">………..Carl</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><a href="mailto:zorn@jlab.org">zorn@jlab.org</a></span><o:p></o:p></p>
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