Sphenix-calibration-l mailing list

[Anthony Frawley <afrawley AT fsu.edu>]

Hi Hugo,

I have defined occupancy as the fraction of TPC bins in a layer that contain hits above threshold. 

You are correct that it is not a very well defined number, since "above threshold" may mean "slightly above threshold".

Tony

---

From: sPHENIX-calibration-l <sphenix-calibration-l-bounces AT lists.bnl.gov> on behalf of Christof Roland via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov>
Sent: Friday, August 7, 2020 10:55 AM
To: Hugo Pereira Da Costa <hugo.pereira-da-costa AT cea.fr>
Cc: Hugo Pereira Da Costa via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov>
Subject: Re: [Sphenix-calibration-l] Draft slides for tomorrow's General Meeting

 

Hi Hugo

> On 7. Aug 2020, at 16:35, Hugo Pereira Da Costa <hugo.pereira-da-costa AT cea.fr> wrote:
>
> Hi Christof,
>
> thanks for the comments. Will implement !
>
> For the TPC occupancy, I 'think' I have the information at hand to get the occupancy, but it needs a bit of working, and won't be ready for today's meeting. (likely next week though). The reason is that occupancy must be evaluated only in a given "time slice" (right ?), or possibly integrated over timeslices, but without double counting ? In fact I am not completely sure how you define occupancy in a TPC ...

The relevant quantity is usually the channel occupancy. i.e. how many channels are above threshold. So within a layer check how many channels are hit devided by the total number of channels.
Within a time slice is not so usefull because the occupancy has a rather pronounced radial dependence.

Cheers

    Christof


> The "Same order of magnitude" statement in slide 10 comes from a comment from Tony during the presentation.
>
> Hugo
>
>
> On 8/7/20 8:22 AM, Christof Roland wrote:
>> Hi Hugo,
>>
>> thanks a lot for preparing the slides.
>> I have a few comments, see below.
>>
>> Cheers
>>
>>    Christof
>>
>> Slide 4
>>  a good part of the milestones / deadlines are in the past already or imminent.
>>  It would be good to point this out on the slide or color code this somehow if the task has actually be completed.
>>
>> Slide 7
>>  Do we have occupancy plots for the TPC as well?
>>
>> Slide 8
>>  Maybe mark a bit better that this refers to the micromegas only the layer 55+ 56 label may not be obvious to everybody.
>>
>> Cheers
>>
>>    Christof
>>  
>>> On 6. Aug 2020, at 21:30, Hugo Pereira Da Costa via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov> wrote:
>>>
>>> Hi all,
>>>
>>> attached a first draft of the slides for tomorrow's General Meeting
>>>
>>> Comments/corrections/additions welcome,
>>>
>>>
>>> Hugo
>>>
>>>
>>> <talk.pdf>_______________________________________________
>>> sPHENIX-calibration-l mailing list
>>> sPHENIX-calibration-l AT lists.bnl.gov
>>> https://urldefense.com/v3/__https://lists.bnl.gov/mailman/listinfo/sphenix-calibration-l__;!!PhOWcWs!mzVl_KFrIcZ3kikYNpI4E7VE7hYdosdzPYJthgQaNqLuRlAIUq0cP-MYdy3o5VEi$

_______________________________________________
sPHENIX-calibration-l mailing list
sPHENIX-calibration-l AT lists.bnl.gov
https://urldefense.com/v3/__https://lists.bnl.gov/mailman/listinfo/sphenix-calibration-l__;!!PhOWcWs!mzVl_KFrIcZ3kikYNpI4E7VE7hYdosdzPYJthgQaNqLuRlAIUq0cP-MYdy3o5VEi$