[Moller] [EXTERNAL] Re: Upcoming seminar on radiation-hard fused silica for MOLLER

[Pitt, Mark]

Hi all,

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:  https://www.jlab.org/conference//heraeus-conamic-seminar<https://www.jlab.org/conference/heraeus-conamic-seminar>

or directly at:  https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_j_1613927452-3Fpwd-3DOEhLL05XMU96QkRMMCttRFZERmJGZz09-26from-3Daddon&d=DwIF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=k2-3YiXM4PG72x9M5ma_2Q&m=X5Qn7XOHELZSeQRjf_vWw7fbk-hsRHfQGFBQpG18Lj3JnA6nGibkD72pztYNoSaN&s=fcw1Z-a15wH4a1583RQcD0WtwYyWH-N0G6YN7sOXAi0&e= 

Mark

From: Moller <moller-bounces at jlab.org> on behalf of Carl Zorn via Moller <moller at jlab.org>
Date: Wednesday, April 10, 2024 at 11:52 AM
To: moller at jlab.org <moller at jlab.org>
Subject: [Moller] Upcoming seminar on radiation-hard fused silica for MOLLER
Wednesday, April 10, 2024

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.

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.

Here’s the key information on the seminar:

                 Fused silica challenges in radiation-hard environments

Presenters: Dr. Frank Nürnberg and Wolfgang Schlichting, Heraeus Conamic

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**.

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.

**https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1016_j.nima.2023.168523&d=DwIF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=k2-3YiXM4PG72x9M5ma_2Q&m=X5Qn7XOHELZSeQRjf_vWw7fbk-hsRHfQGFBQpG18Lj3JnA6nGibkD72pztYNoSaN&s=Z0qOuid43JXwFJEzP4inp9-MiAqVlV7UE8sOU-kIFC0&e= 
S. Yang et al., Nuclear Instruments and Methods in Physics Research, A 1055 (2023) 168523
Optical Transmission characterization of fused silica materials irradiated at the CERN Large Hadron Collider.

All the best,

………..Carl
zorn at jlab.org<mailto:zorn at jlab.org>











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