[dsg-hallb_rich] [EXTERNAL] Re: Test of Grainger springs on mirror mounting points

[Marco Mirazita]

Hi Tyler,
ok, that's the right assembly. I suggest you to prepare all the 25 
mounts with the springs you have in hands, including the 4 small screws 
and nuts on the flange, so they are ready to be shipped to CMA.
As for the remaining 5, you can try to look in the small clean room, we 
assembled the mounts there.

Now that you have permission to write on /work can you please copy the 
code to make the analysis of the mirror tests?
Thanks,
Marco


Il 2021-10-18 22:24 Tyler Lemon ha scritto:
> Hi Marco,
> 
>  Attached are a series of photos with the mirror spring assembly with
> the spherical washer and the second nut.
> 
>  The spring still fits well in the assembly.
> 
>  -Tyler
> 
> -------------------------
> 
> From: Marco Mirazita <Marco.Mirazita at lnf.infn.it>
> Sent: Monday, October 18, 2021 8:31 AM
> To: Tyler Lemon <tlemon at jlab.org>
> Cc: dsg-hallb_rich at jlab.org <dsg-hallb_rich at jlab.org>
> Subject: Re: [dsg-hallb_rich] [EXTERNAL] Re: Test of Grainger springs
> on mirror mounting points
> 
> Hi Tyler,
> the pair of washer must be there to have reliable adjustment of the
> mirror without putting stress on the rod and on the flange.
> The second nut is ensuring that the adjustment cannot move anymore
> once
> we have found the best alignment. It will be inserted only at the end
> of
> the alignment of the mirrors on the RICH, for the moment it is not
> necessary.
> Marco
> 
> Il 2021-10-18 14:26 Tyler Lemon ha scritto:
>> Hi Marco,
>> 
>>  I can resend photos with the spherical washer and additional nut.
>> 
>>  Regardless, even without those two items, the spring seems to fit
> in
>> the assembly.
>> 
>> -------------------------
>> 
>> From: Marco Mirazita <Marco.Mirazita at lnf.infn.it>
>> Sent: Monday, October 18, 2021 4:56 AM
>> To: Tyler Lemon <tlemon at jlab.org>
>> Cc: dsg-hallb_rich at jlab.org <dsg-hallb_rich at jlab.org>; Patrizia
> Rossi
>> <rossi at jlab.org>; Amrit Yegneswaran <yeg at jlab.org>
>> Subject: [EXTERNAL] Re: Test of Grainger springs on mirror mounting
>> points
>> 
>> Hi Tyler,
>> there is one piece missing. After slide 4, the flange is fixed on
> the
>> spring by a conical washer, a spherical washer and then the nut.
>> I attached here drawings of the two washers and of the full
> assembly.
>> Let me know if you can find all the parts, we can have a bluejeans
>> meeting if you want.
>> Marco
>> 
>> Il 2021-10-15 20:17 Tyler Lemon ha scritto:
>>> Hi Marco Mirazita,
>>> 
>>>  I put together the parts if the mirror mounting points like we
>>> discussed in this morning's meeting.
>>> 
>>>  The Grainger springs are stable and fit well in the grooves and
>>> recesses of the mounting point parts.
>>> 
>>>  Attached are photos in series of how I put it together.
>>> 
>>>  Also, I was not able to find any spare springs from RICH-1. I
>> looked
>>> in all cabinets in EEL 124 cleanroom with RICH parts and the
> cabinet
>>> in the EEL hallway with RICH parts. I did find one box with parts
>>> similar to what you recently shipped me, but there were no springs.
>>> 
>>>  On a more positive note, I did find a fiber polishing kit in the
>> RICH
>>> cabinet in EEL 124, so we will be able to polish the d0 source
> fiber
>>> next time we run tests.
>>> 
>>>  -Tyler
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