[Dsg-rich] Question regarding RICH rotation calculations

Tomassini Sandro sandro.tomassini at lnf.infn.it
Tue Apr 4 08:24:27 EDT 2017


Hi Tyler,

I apologize for the  late answer.

About L3 in the second slide (vertical calculation) you are right,  it 
was wrong.
The right dimension for L3 is in the file attached to this email.

Many thanks for your work

Sandro


Il 31/03/2017 14:56, Tyler Lemon ha scritto:
> Hello Sandro,
>
> We've been reviewing the calculations you provided for the forces 
> during the RICH rotation and have a question. Attached are two slides 
> with the diagrams showing the RICH in its horizontal and vertical 
> positions for reference.
>
> For the horizontal position, L3 is to the lift point where the winch 
> cable attaches to RICH. However, in the vertical position, L3 is to 
> the detector's center of mass. Was a different calculation used for 
> the vertical position that required a different definition of L3?
>
> Please let us know as it would help us better understand the forces on 
> the assembly structure components during the RICH rotation process.
>
> Best regards,
> Tyler
>
>
> _______________________________________________
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> Dsg-rich at jlab.org
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-- 
-----------------------------------------
Dr. Eng. Sandro Tomassini
Istituto Nazionale di Fisica Nucleare
Laboratori Nazionali di Frascati
---Research Division---
P.O.Box 13 00044 Frascati (RM) Italy
Tel. office: +39 06 9403 2919/8089
Fax: +39 06 94032256
e-mail: sandro.tomassini at lnf.infn.it
http://www.lnf.infn.it/
-----------------------------------------
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