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Hi Zhiwen, Paul and all:</div>
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We need to keep in mind that at some point we will need to swap all clear fibers, due to radiation and other damages. The WLS fibers however will be permanent with the modules. Fiber fusing is less realistic in that scenario.</div>
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I think we could explore the light guide options. The 1mm MC-> 0.5mm SC bundle was a bit confusing and the light loss is better than I had expected: from cladding alone (angle of internal reflection), the loss should already by 40% (5% vs. 3%), and there should
certainly be area mismatch that adds to the 40%. Perhaps the real loss of the bundle option is more than 40%? In any case, light guide has always been an option that I had not had a chance to explore.<br>
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Xiaochao<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Solid_ec <solid_ec-bounces@jlab.org> on behalf of Zhiwen Zhao <zwzhao@jlab.org><br>
<b>Sent:</b> Wednesday, October 20, 2021 11:20 AM<br>
<b>To:</b> Reimer, Paul E. <reimer@anl.gov>; Cunfeng Feng <fengcf@email.sdu.edu.cn><br>
<b>Cc:</b> solid_ec@jlab.org <solid_ec@jlab.org><br>
<b>Subject:</b> Re: [Solid_ec] [EXTERNAL] Re: SoLID ECal meeting 8:00am EDT Wednesday October 6th</font>
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<div class="PlainText">Dear All<br>
<br>
instead of connector or mechanic splicing, I wonder if some suppliers <br>
can do one to one fiber Fusion splicing with relative low cost<br>
<a href="https://tecratools.com/pages/tecalert/splicing_guide.html">https://tecratools.com/pages/tecalert/splicing_guide.html</a><br>
<br>
Zhiwen<br>
<br>
On 10/20/2021 11:07 AM, Reimer, Paul E. wrote:<br>
> Dear Cunfeng,<br>
> <br>
> <br>
> Okay. I wasn't sure if it would help or not, but wanted it to be <br>
> considered by you.<br>
> <br>
> <br>
> Thanks,<br>
> <br>
> <br>
> Paul<br>
> <br>
> -- <br>
> If you receive this e-mail after hours, during a weekend, or on a holiday,<br>
> please enjoy your time off and respond during your working hours.<br>
> <br>
> Paul E Reimer +1-630-252-4037 (Office)<br>
> Bldg 203, Physics Division +1-630-252-3903 (fax)<br>
> Argonne National Laboratory +1-630-344-9207 (mobile)<br>
> 9700 S Cass Avereimer@anl.gov<br>
> Lemont, IL 60439 USA. he/his/him<br>
> <br>
> On 10/20/21 09:47, Cunfeng Feng wrote:<br>
>> Dear Paul,<br>
>><br>
>> Thanks for your suggestion and plot. As I understand, the bundle <br>
>> connecting loss more light than one by one due to the gap of the clear <br>
>> fiber. The light guide don't improve it, and add reflectiong. So I <br>
>> guess this light guide don't improve the light lost.<br>
>><br>
>> Cunfeng<br>
>><br>
>><br>
>> 发件人："Reimer, Paul E." <reimer@anl.gov><br>
>> 发送日期：2021-10-20 22:16:09<br>
>> 收件人："solid_ec@jlab.org" <solid_ec@jlab.org><br>
>> 主题：[Solid_ec] [EXTERNAL] Re: SoLID ECal meeting 8:00am EDT <br>
>> Wednesday October 6th<br>
>><br>
>> Hello,<br>
>><br>
>><br>
>> During this week's meeting, there was a discussion of connecting<br>
>> the wave length shifting fibers with clear fibers of a different<br>
>> diameter. I think that It was said that a many-to-many system of<br>
>> just bunching lost about 35% of the light (I probably am not<br>
>> remembering this number correctly). The one-to-one option, on the<br>
>> other hand, seems difficult to implement. Below is an idea for a<br>
>> many-to-many system that might not loose as much light. The key<br>
>> is that it allows the light to spread out and mix between fibers<br>
>> in a small cylindrical light guide. Thus, for fibers that don't<br>
>> happen to align exactly, not all of the light will be lost, as the<br>
>> cone of light emitted from the fiber will have a chance to expand<br>
>> a bit. There is still the ratio of fiber areas that you can't get<br>
>> around.<br>
>><br>
>><br>
>> Paul<br>
>><br>
>><br>
>> -- <br>
>> If you receive this e-mail after hours, during a weekend, or on a holiday,<br>
>> please enjoy your time off and respond during your working hours.<br>
>><br>
>> Paul E Reimer +1-630-252-4037 (Office)<br>
>> Bldg 203, Physics Division +1-630-252-3903 (fax)<br>
>> Argonne National Laboratory +1-630-344-9207 (mobile)<br>
>> 9700 S Cass Avereimer@anl.gov<br>
>> Lemont, IL 60439 USA. he/his/him<br>
>><br>
>> On 10/19/21 19:12, Xiaochao Zheng wrote:<br>
>>> Dear All:<br>
>>><br>
>>> Our next ECal meeting will be*8:00**am*(US Eastern Daylight<br>
>>> Saving time), *Wednesday October 20th. *Here is a tentative agenda:<br>
>>><br>
>>> 1) Updates from THU (Zhihong)<br>
>>> 2) Updates from SDU (if applicable);<br>
>>> 3) Support structure update (Paul);<br>
>>> 4) JLab beam test discussions;<br>
>>><br>
>>> Bluejean link is below.<br>
>>><br>
>>> Meeting minutes are at (sorry if it's/still/ a bit outdated)<br>
>>> <a href="https://hallaweb.jlab.org/experiment/PVDIS/SoLID/EC/meetings/SoLID_EC_Weekly_minutes.html">
https://hallaweb.jlab.org/experiment/PVDIS/SoLID/EC/meetings/SoLID_EC_Weekly_minutes.html</a><br>
>>> <<a href="https://hallaweb.jlab.org/experiment/PVDIS/SoLID/EC/meetings/SoLID_EC_Weekly_minutes.html">https://hallaweb.jlab.org/experiment/PVDIS/SoLID/EC/meetings/SoLID_EC_Weekly_minutes.html</a>><br>
>>><br>
>>> Thanks,<br>
>>><br>
>>> Xiaochao<br>
>>><br>
>>> Meeting URL<br>
>>> <a href="https://bluejeans.com/670325644?src=join_info">https://bluejeans.com/670325644?src=join_info</a><br>
>>><br>
>>> Meeting ID<br>
>>> 670 325 644<br>
>>><br>
>>> Want to dial in from a phone?<br>
>>><br>
>>> Dial one of the following numbers:<br>
>>> +1.888.240.2560 (US Toll Free)<br>
>>> (see all numbers - <a href="https://www.bluejeans.com/premium-numbers)">https://www.bluejeans.com/premium-numbers)</a><br>
>>><br>
>>> Enter the meeting ID and passcode followed by #<br>
>>><br>
>>> Connecting from a room system?<br>
>>> Dial: bjn.vc or 199.48.152.152 and enter your meeting ID & passcode<br>
>>><br>
>>> _______________________________________________<br>
>>> Solid_ec mailing list<br>
>>> Solid_ec@jlab.org<br>
>>> <a href="https://mailman.jlab.org/mailman/listinfo/solid_ec">https://mailman.jlab.org/mailman/listinfo/solid_ec</a><br>
>><br>
>><br>
> <br>
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