[Halld-tracking-hw] Preamps

[Fernando J. Barbosa]

Hi Naomi,

I suggest we reserve part of the next tracking meeting to discuss these 
issues.

Let me also take the opportunity to emphasize that the CDC and the FDC 
groups must finalize their measurements so that the procurement of the 
ASICs is not impacted. This means that I would like to close this 
project by 25 June 2010.

Thanks and best regards,
Fernando


Naomi Jarvis wrote:
>
> Good morning!
>
> I would like to talk about the new preamp but I don't think there will 
> be enough time in our tracking mtg this morning.
> The concerns are that the preamp output is topping out at around 500 
> mV even with the cosmics, and the gain for cosmics seems to have 
> increased, whereas for Fe55 it was ~1/3 less.
>
> I put one page on the wiki      
> http://www.jlab.org/Hall-D/software/wiki/index.php/CDC#Preamp4_.28GlueXdoc1364_Tbl_2_Row_2.29 
>
> The recent cosmic runs there took a week each, and were with the 
> chamber flat, ie 90 degree cosmics.   I'll add more data as it becomes 
> available;  at present it is counting at 2kV.
> Can we set up a time to talk about this next week?   (The rest of this 
> week is out for us; I think the only times we cannot do next week are 
> 1pm Tues + the regular mtg on Wed).
>
> Thanks,
>
> Naomi.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: barbosa.vcf
Type: text/x-vcard
Size: 188 bytes
Desc: not available
Url : https://mailman.jlab.org/pipermail/halld-tracking-hw/attachments/20100609/e9c6b374/attachment.vcf