[Solid_ec] some info from Hamamatsu and visit plan

[J. P. Chen]

Hi, Xiaochao, Zhiwen and All,

Since we are not going to have a EC meeting tomorrow (right, Xiaochao?),
just drop a few words here.

Thanks Zhiwen for the information.
Took a quick glance at the information. A few interesting observations:
1) There is a low gain type of MAPMT to the H8500 series, which is
H10966 series. H8500 has R10551 and H10966 has R10552. The main
difference is the anode stages (H8500 has 12 while H10966 has only 8).
WhileH8500 is good for the Cherenkov detectors, low gain H10966 may be 
better
for our preshower, which has significantly more photo-electrons compared 
to the
Cherenkov detectors.

2) H7546B and H7546B-20) has R7600 inside. Zhiwen, please correct your 
inf on the web.

3) In addition to the 64-channel MAPMTs, there are also 256 (H9500) and 
16 channels
(H8711/H8711-20). We should find out from the test to see if we can use 
multi-channel
or not, and which models will be the best fit.

4) The typical gain variation is 2:1 and maximum is 3:1 (at least for a 
few secs i looked at).

Zhiwen,
would you please also get a better price quote for the single channel 
PMT option?

Thanks.

Jian-ping

On 10/21/2013 4:32 PM, Zhiwen Zhao wrote:
> Hi, All
>
> I learned some info from Hamamatsu
> https://hallaweb.jlab.org/wiki/index.php/Solid_calorimeter_readout#Hamamatsu_related
> For the uniformity, the question is how much we need?
>
> The Technical Sales Rep from Hamamatsu plans a visit to Jlab between the
> week of 11/11 and the week of 11/18
> For any one of us plan to meet with him, please let me know a preferred
> week an any particular day.
>
> Thanks
>
> Zhiwen
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