[Solid_ec] SoLID EC meeting at 10am tomorrow

Fri Apr 5 17:15:43 EDT 2013

Hi, Xiaochao

The 85cm is from latest drawing from Paul
The 240cm was my guess.
To get the precise number, we need a circular line on Paul's drawing at 
r=221cm and keep any module cross that line and considering the hexagon 
module has largest lateral size about 13cm, I think 235cm is a better 
estimation.

Zhiwen

On 4/5/2013 4:41 PM, Paul E. Reimer wrote:
> Hello Xiaochao,
>
> It could be that I sent you an older drawing.  The original drawing
> didn't cover the full area, but I thought I had that changed.
>
> Paul
>
> On 4/5/13 3:37 PM, Xiaochao Zheng wrote:
>> Hi Zhiwen:
>>
>> looking at Paul's endplate layout design I don't see why you need from 85 to 240cm. Can you elaborate?  I have attached Paul's drawing which is from about 100 to 250cm. It's for both SIDIS and PVDIS. For SIDIS I suppose only the portion from 100 to 220cm will be filled.
>>
>> Xiaochao
>>
>> ----- Original Message -----
>> From: "Zhiwen Zhao"<zwzhao at jlab.org>
>> To: "Xiaochao Zheng"<xiaochao at jlab.org>
>> Cc:jinhuang at jlab.org, "solid ec"<solid_ec at jlab.org>
>> Sent: Wednesday, April 3, 2013 4:59:05 PM
>> Subject: Re: [Solid_ec] SoLID EC meeting at 10am tomorrow
>>
>> After seeing the layout of Hexagon, I think we should try to use SPD to
>> cover all the EC area from 85 to 240cm in next round of background
>> simulation.
>> To estimate the seperation now, Jin can just use the fitting formula and
>> extrapolate to these values and we should have a rough number for IHEP.
>>
>> Zhiwen
>>
>> On 4/3/2013 9:14 AM, Xiaochao Zheng wrote:
>>> I agree with Jin on the first topic.
>>>
>>> On th second, the IHEP cost could depend on the size and the shape of the Sc pad. The size could also be limited by their production facility.
>>>
>>> Xiaochao
>>>
>>> Hi, Zhiwen,
>>>
>>> Thanks for the comment. My reply would be following
>>>
>>>> Another idea is do 120 segmentation all in fan shape instead of 60 fan
>>> with two section.
>>> Did we exclude that?
>>>
>>> My understanding from previous discussion is YES. One important reason is
>>> that 60x2 segmentation have better scintillator pad to shower
>>> correspondence. For example, in 120x1 segments, the inner width of the
>>> module is half of the width of one calorimeter module. Therefore, when one
>>> inner calorimeter was triggered, two segments in in scintillator will be
>>> checked in trigger level, which effectively reduced it to 60 segments.
>>>
>>>
>>>> Either way, I think WLS fiber is a preferred way to readout so that we
>>> don't need worry about light propagation and PMT in field.
>>>
>>>> For realistic EC layout, I think the SPD inner radius needs to be around
>>> 85cm and outer 240cm So where exact the separation of the two sections
>>> exists is only an rough estimation. I don't think IHEP really needs it now.
>>>
>>> Your background simulation only covered R = 100-220 cm, which is consistent
>>> with forward calorimeter size in our write up too. If in final layout you
>>> find the scintillator need to be larger, please update both.
>>>
>>> And I agree that this change should NOT matter at this stage as well as for
>>> communication to IHEP.
>>>
>>>
>>> Cheers
>>>
>>> Jin
>>>
>>> __________________________________________
>>>
>>> Jin HUANG
>>>
>>> Los Alamos National Laboratory
>>> PO Box 1663, MS H846, Los Alamos, NM 87545
>>>
>>> Office:(505) 665-2523, Cell:(757) 604-9946
>>> __________________________________________
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: Zhiwen Zhao [mailto:zwzhao at jlab.org]
>>> Sent: Tuesday, April 02, 2013 2:08 PM
>>> To:jinhuang at jlab.org
>>> Cc: 'Xiaochao Zheng'; 'solid ec'
>>> Subject: Re: [Solid_ec] SoLID EC meeting at 10am tomorrow
>>>
>>> Another idea is do 120 segmentation all in fan shape instead of 60 fan with
>>> two section.
>>> Did we exclude that?
>>>
>>> Either way, I think WLS fiber is a preferred way to readout so that we don't
>>> need worry about light propagation and PMT in field.
>>>
>>> For realistic EC layout, I think the SPD inner radius needs to be around
>>> 85cm and outer 240cm So where exact the separation of the two sections
>>> exists is only an rough estimation. I don't think IHEP really needs it now.
>>>
>>> Zhiwen
>>>
>>> On 4/2/2013 11:48 AM, Jin Huang wrote:
>>>> Hi Xiaochao,
>>>>
>>>> Following our discussion, I am writing to suggest radial segmentation
>>>> for SIDIS forward photon-rejection scintillator pad.
>>>>
>>>> The rate VS R distribution was shown on page 7 of the last
>>>> collaboration meeting talk. It can be well parameterized with
>>>> Rate = E^(11.0391 - 0.0212754*R)*R   Hz/cm^2
>>>>
>>>> Therefore, if we require equal rate on the two radial segments of
>>>> scintillator pad, the division will be 100-137 cm and 137-220 cm.
>>>>
>>>> Cheers,
>>>>
>>>> Jin
>>>>
>>>>
>>>>
>>>> __________________________________________
>>>>
>>>> Jin HUANG
>>>>
>>>> Los Alamos National Laboratory
>>>> PO Box 1663, MS H846, Los Alamos, NM 87545
>>>>
>>>> Office:(505) 665-2523, Cell:(757) 604-9946
>>>> __________________________________________
>>>>
>>>>
>>>>
>>>> -----Original Message-----
>>>> From:solid_ec-bounces at jlab.org  [mailto:solid_ec-bounces at jlab.org] On
>>>> Behalf Of Xiaochao Zheng
>>>> Sent: Monday, April 01, 2013 2:15 PM
>>>> To: solid ec
>>>> Subject: [Solid_ec] SoLID EC meeting at 10am tomorrow
>>>>
>>>> Dear All:
>>>>
>>>> This is a reminder that we will have our weekly SoLID EC meeting
>>>> tomorrow at 10am.
>>>>
>>>> Call in instruction is as follows:
>>>>
>>>> US 866-740-1260 International 303-248-0285 Access code: 8206694
>>>>
>>>> JLab people should meet in room L102.
>>>>
>>>> Cheers,
>>>>
>>>> Xiaochao
>>>>
>>>> ----------------------------------------------------------------------
>>>> ------ Associate Professor, Department of Physics, University of
>>>> Virginia
>>>> 382 McCormick Rd, Charlottesville, VA 22904
>>>> Telephone: (434) 243-4032 (during academic year); or (757) 810-2885
>>>> (summer)
>>>> Homepage:http://people.virginia.edu/~xz5y/Main.html
>>>> ----------------------------------------------------------------------
>>>> ------
>>>>
>>>>
>>>> _______________________________________________
>>>> Solid_ec mailing list
>>>> Solid_ec at jlab.org
>>>> https://mailman.jlab.org/mailman/listinfo/solid_ec
>>>> _______________________________________________
>>>> Solid_ec mailing list
>>>> Solid_ec at jlab.org
>>>> https://mailman.jlab.org/mailman/listinfo/solid_ec
>>>> _______________________________________________
>>>> Solid_ec mailing list
>>>> Solid_ec at jlab.org
>>>> https://mailman.jlab.org/mailman/listinfo/solid_ec
>>>> _______________________________________________
>>>> Solid_ec mailing list
>>>> Solid_ec at jlab.org
>>>> https://mailman.jlab.org/mailman/listinfo/solid_ec
>>>> _______________________________________________
>>>> Solid_ec mailing list
>>>> Solid_ec at jlab.org
>>>> https://mailman.jlab.org/mailman/listinfo/solid_ec
>>>> _______________________________________________
>>>> Solid_ec mailing list
>>>> Solid_ec at jlab.org
>>>> https://mailman.jlab.org/mailman/listinfo/solid_ec
>>>>
>>>> _______________________________________________
>>>> Solid_ec mailing list
>>>> Solid_ec at jlab.org
>>>> https://mailman.jlab.org/mailman/listinfo/solid_ec
>>>>
>>>
>>>
>>> _______________________________________________
>>> Solid_ec mailing list
>>> Solid_ec at jlab.org
>>> https://mailman.jlab.org/mailman/listinfo/solid_ec
>
> --
> Paul E. Reimer                 +1-630-252-4037 (Argonne Office)
> Physics Division Bldg 203      +1-630-252-3903 (Argonne Fax)
> 9700 S. Cass Ave.              +1-630-840-5709 (Fermilab)
> Argonne, IL  60439             +1-630-344-9207 (Cell)
> USAreimer at anl.gov
>
>
>
> _______________________________________________
> Solid_ec mailing list
> Solid_ec at jlab.org
> https://mailman.jlab.org/mailman/listinfo/solid_ec
>