[Solid_ec] [EXTERNAL] Re: SoLID ECal meeting 8:00am EDT Wednesday October 6th

[Cunfeng Feng]

Dear Paul,


Thanks for your suggestion and plot. As I understand, the bundle connecting loss more light than one by one due to the gap of the clear fiber. The light guide don't improve it, and add reflectiong. So I guess this light guide don't improve the light lost.

Cunfeng



发件人："Reimer, Paul E." <reimer at anl.gov>
发送日期：2021-10-20 22:16:09
收件人："solid_ec at jlab.org" <solid_ec at jlab.org>
主题：[Solid_ec] [EXTERNAL] Re: SoLID ECal meeting 8:00am EDT Wednesday October 6th
Hello,


During this week's meeting, there was a discussion of connecting the wave length shifting fibers with clear fibers of a different diameter.  I think that It was said that a many-to-many system of just bunching lost about 35% of the light (I probably am not remembering this number correctly). The one-to-one option, on the other hand, seems difficult to implement.  Below is an idea for a many-to-many system that might not loose as much light.  The key is that it allows the light to spread out and mix between fibers in a small cylindrical light guide.  Thus, for fibers that don't happen to align exactly, not all of the light will be lost, as the cone of light emitted from the fiber will have a chance to expand a bit.  There is still the ratio of fiber areas that you can't get around.


Paul



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Lemont, IL  60439 USA.      he/his/himOn 10/19/21 19:12, Xiaochao Zheng wrote:

Dear All:

Our next ECal meeting will be 8:00am (US Eastern Daylight Saving time), Wednesday October 20th.  Here is a tentative agenda:


1) Updates from THU (Zhihong)

2) Updates from SDU (if applicable);
3) Support structure update (Paul);
4) JLab beam test discussions;



Bluejean link is below.



Meeting minutes are at (sorry if it's still a bit outdated)

https://hallaweb.jlab.org/experiment/PVDIS/SoLID/EC/meetings/SoLID_EC_Weekly_minutes.html

Thanks,



Xiaochao


Meeting URLhttps://bluejeans.com/670325644?src=join_info


Meeting ID
670 325 644


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