[Halld-pid-upgrade] mirror reflectivity

[Jochen Schwiening]

Hi Maria,

we should definitely keep the reflectivity for the mirrors at the far 
end of the bars as we had it originally. Those values were measured by 
Jerry 20+ years ago and look different enough from the new optical box 
mirrors to possibly make a (small) difference.

Thanks,
	Joe

On 2/13/2019 23:27, Maria Patsyuk wrote:
> Hi,
> 
> I pushed the new reflectivity.
> As a side effect, now the far-end mirror on each radiator has the 
> reflectivity, which John measured.
> Maybe we should keep the initial reflectivity for the far end mirror?
> 
> Best regards,
> Maria
> 
>> On Feb 13, 2019, at 4:44 PM, Maria Patsyuk <mpatsyuk at mit.edu 
>> <mailto:mpatsyuk at mit.edu>> wrote:
>>
>> Hi,
>>
>> attached is the mirror reflectivity I’m going to put in the geometry 
>> and the data present in hdds currently (for comparison).
>> John was able to measure the mirror reflectivity in the range [325, 
>> 600] nm. I extrapolated linearly the reflectivity in [250, 320] nm and 
>> above 600 nm to have the same wavelength range as it was for the 
>> current reflectivity.
>>
>> Best regards,
>> Maria
>>
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> 
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