[Solid_tof] solid mrpc trigger response

[Mickey Chiu]

Hi JP,

I’m actually in Taiwan right now, so I won’t be able to attend in person.  I think I can dial in if there is a teleconference set up.

Mickey

> On Aug 20, 2016, at 4:34 AM, Jian-Ping Chen <jpchen at jlab.org> wrote:
> 
> Hi, Mickey,
> 
> At the next SoLID collaboration meeting 8/26-8/27, I would like to have a discussion on
> TOF improvement R&D. It will be very helpful if you can be here for the discussion.
> Will you be able to attend?
> 
> Thanks.
> 
> Jian-ping
> 
> On 8/17/16 4:29 PM, Zhiwen Zhao wrote:
>> hi, Yi and Mickey
>> 
>> As you may know, we plan to use MRPC as part of SoLID SIDIS trigger to reject photons
>> To do the study, I simulated how particle deposit energies in mrpc gas layers
>> and assumes the MRPC response is something like below
>> ========================================================================================== 
>> 1. at least a single particle having energy deposition > 16eV for ionization in one layer of Freon gas will fire this layer
>> 2. the mrpc fires when the number of layers fires is at least n
>> 3. I am guessing we can start the study with n=5 for trigger threshold. We could use other value for charge particle detection.
>> ========================================================================================== 
>> Do you have any comment or suggestion?
>> 
>> Another thing is about mrpc segmentation
>> Because of low energy photons could be dominant background for mrpc, the number and direction of segmentation may affect
>> how high the occupancy by background is and how trigger performs.
>> I see PreCDR has the design 50 supermodule and 3 modules per super module, total 150 modules
>> I assume the supermodules is segmented along azimuthal direction and 3 modules in each supermodule is along radial direction?
>> Is there any freedom of changing the segmentation if trigger demands?
>> Will that impact charge particle detection?
>> 
>> Thanks
>> 
>> Zhiwen
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> _______________________________________________
>> Solid_tof mailing list
>> Solid_tof at jlab.org
>> https://mailman.jlab.org/mailman/listinfo/solid_tof
> 

-- 
Building 510C
Department of Physics
Brookhaven National Laboratory
Upton, NY 11973
Phone: 631-344-8428