[Halld-tracking-hw] Preamps

[Fernando J. Barbosa]

Hi Curtis,

Would Monday @ 10  next week work for everyone?

Best regards,
Fernando



Curtis A. Meyer wrote:
> Hi Fernando
>
>   the next tracking meeting is not until June 23, so if we wait until 
> then to discuss this
> issue, we will certainly fail to meet your deadline of June 25. It 
> also takes several days
> of cosmic running to get a data point, so checking anything also takes 
> time. If there is any
> way that we could have a meeting next week, it would help speed things 
> along.
>
>   thanks - Curtis
>
>
> On 6/9/10 12:55 PM, Fernando J. Barbosa wrote:
>> 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.
>
>
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