[Clas12_rich] Visual Inspection of RICH Mirrors 5 and 6

Marco Mirazita Marco.Mirazita at lnf.infn.it
Thu Sep 1 04:03:32 EDT 2016


Hi Tyler,
thank you very much for this careful inspection. I'm going to discuss 
about it with the producers.
Could you please send me a scan of the documentation of the mirrors 
1,2,5,6?
The producers should have sent also the pdf files, but they didn't.
Thank you,
Marco


Il 2016-08-31 23:34 Tyler Lemon ha scritto:
> Dear Dr. Rossi,
> 
> As requested, we have visually inspected RICH Mirrors 5 and 6.
> Attached are photos from the inspection.
> 
> The results are as follows with the name of the picture showing the
> issue in parentheses:
> 
> MIRROR 5
> 
> 	* Holes in outer bag. (Mirror 5_01)
> 	* White board covering mirror surface did not cover surface on an
> edge (Mirror 5_02)
> 
> 	*
> 
> Mirror was missing padding put at corner for one corner (Mirror 5_03)
> 
> 	* Padding had fallen out into outer bag, was placed in proper spot
> when repacking.
> 
> 	* Crease on back surface (Mirror 5_04)
> 
> 	* Saw similar creases on other mirrors, may be from manufacturing.
> 
> 	* Mirror surface corner not on pad was scuffed (Mirror 5_05)
> 
> 	* Scratches on mirror surface. (Mirror 5_06, Mirror 5_07)
> 
> 	* Visible line down center of mirror (Mirror 5_08)
> 
> 	* Line was not scratch, could be from manufacturing process.
> 
> 	* Small, black piece of material on mirror surface (Mirror 5_09)
> 
> MIRROR 6
> 
> 	* Holes in outer bag (Mirror 6_01)
> 
> 	* Corner of back surface punctured interior wrapping material (Mirror
> 6_02)
> 
> 	* White board covering mirror surface did not cover surface along one
> edge (Mirror 6_03)
> 
> 	* Crease on skin of back surface (Mirror 6_04)
> 
> 	* Saw similar creases on other mirrors, may be from manufacturing.
> 
> 	* Tape had stuck to mirror surface, but did not leave mark on mirror
> surface (Mirror 6_05)
> 
> 	* Small scratches and scuffs on mirror surface (Scratch- Mirror 6_06,
> Scuff- Mirror 6_07)
> 	* Small divot on mirror surface (Mirror 6_08)
> 
> 	* Visible line down center of mirror (Mirror 5_09)
> 
> 	* Line was not scratch, could be from manufacturing process.
> 
> In addition to the above, both mirrors were not wrapped in the white
> padding material very well. For Mirror 5, the padding seemed pieced
> together out of pieces of material rather than single, long pieces as
> with the other mirrors. For Mirror 6, there was one really long piece
> of padding wrapped several times around the mirror, rather than only
> once and then securely taped. After inspecting the mirrors, we
> re-wrapped them as best we could so they are now wrapped how the
> previous mirrors were wrapped.
> 
> I am not sure of whether a few of the above, like the creases on the
> back skin and the lines on the mirror surface, are just from the
> manufacturing process. I am also not sure if the small scratches are a
> big problem because the mirrors do not have the final coating yet.
> 
> Best regards,
> 
> Tyler
> 
> 
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