[Halld-cal] Cal Working Group Meeting next week?

[George Lolos]

Hi Matt:

I agree.  I read your e-mails on the matter and I also worry about it.  When the first idea to sum up three arrays to increase the dynamic range was floated, I remember a discussion on what the effect would be on the noise level and the thresholds it would imply.  However, at that time we didn't know what dark rates we would finally get from the production devices, or even if we would go with SiPM arrays, so that specific issue laid dormant.  I am glad you brought it up again because I am also concerned of the effect.

George


On 2010-07-18, at 9:02 PM, Matthew Shepherd wrote:

> 
> Hi all,
> 
> I propose we cancel this week's meeting.
> 
> The one item that I would like to discuss in detail at some point are the issues regarding summing of SiPMs in the BCAL and the impact this has on low energy photon reconstruction.  I sent this around in a email last week.  In order for us to proceed further on the simulation to investigate this issue we need an update or check of the assumptions that go into the threshold calculation.  Please give my email a read an also maybe review the referenced document.  Then we should arrange a discussion for how to proceed, but this is best done when we everyone is able to participate.
> 
> -Matt
> 
> 
> On Jul 18, 2010, at 1:04 PM, George Lolos wrote:
> 
>> Hi Elton:
>> 
>> I am just back from Europe and I'll spend most of next week catching up with all administrative and financial aspects of the group plus interacting with the graduate students and Andrei to plan the next few weeks.  Although I plan to participate in the meeting and report as necessary, I don't think I'll have the time to organize.  If Matt is also busy and if there's not much urgency to report, as Zisis suggests, I say perhaps we should cancel it.
>> 
>> Cheers,
>> 
>> George
>> 
>> On 2010-07-16, at 11:54 PM, Zisis Papandreou wrote:
>> 
>>> Hi Elton:
>>> 
>>> I am still in Greece until July 30 so I will not be able to run the meeting.  Perhaps George or Matt can, and if not, let's cancel it.  If there are urgent items that come up they can be brought through via email.  Since Andrei reported on the cosmics yesterday in the Readout meeting, and since the construction is going routine, there should be little to report.
>>> 
>>> I'm sure we'll get back on track in August, as I am happy to run any meeting when you are not available.
>>> 
>>> Cheers, Zisis...
>>> 
>>> ---
>>> Dr. Zisis Papandreou    |  email: zisis at uregina.ca
>>> Department of Physics |  tel. : (306) 585-5379
>>> University of Regina     |  tel. : (306) 585-4149
>>> Regina, SK  S4S 0A2     |  fax. : (306) 585-5659
>>> 
>>> World Wide Web:    http://www.phys.uregina.ca/sparro/zisis/
>>>>>> Elton Smith <elton at jlab.org> 07/16/10 12:43 (Fìì >>>
>>> 
>>> Hi Matt/Zisis/George,
>>> 
>>> I will be out of town next week, so will be unable to cover the cal
>>> working group meeting.  Unfortunately, last week was the trigger workshop,
>>> so we skipped that meeting as well. If any of you would like to organize
>>> the meeting, please update the wiki with an agenda and meeting notes.
>>> 
>>> Thanks, Elton.
>>> 
>>> Elton Smith
>>> Jefferson Lab MS 12H5
>>> 12000 Jefferson Ave
>>> Suite # 16
>>> Newport News, VA 23606
>>> elton at jlab.org
>>> (757) 269-7625
>>> (757) 269-6331 fax
>> 
> 
> 
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