[Alert_collaboration] [EXTERNAL] Analyzing the RG-L Luminosity scan data

[mhattawy@odu.edu]

Hello Stepan,
   I did one more iteration over full statistics and updated vz cut [-45,
45] cm. The results are attached and very close to what Mathieu sent you,
confirming your guess.

Best regards,
Mohammad.

On Mon, Apr 21, 2025 at 3:59 PM Stepan Stepanyan <stepanya at jlab.org> wrote:

> I do not have a clear picture of the target, but if I take a 45 cm long
> 4He gas at 5.5 atm and two 50um Al windows, at 500 nA, the luminosity will
> be ~10^35. So, at 250 nA, we are running about the same luminosity as RGA
> at 50 nA (if my math is correct). If I take Mathieu's efficiency numbers at
> 250 nA, the average slope will be about 0.16% per nA in RGA(B) scale.
>
> By the way, the efficiency calculation should not depend on the target
> length selection, as the inefficiency is from occupancies in DCs, and the
> occupancy, the background hits, are coming from the whole target region,
> including material outside of the target.
>
> Regards,
> Stepan
>
> On Apr 21, 2025, at 12:27 PM, Mathieu Ouillon <ouillon at jlab.org> wrote:
>
> Hello all,
>
> I have produced the efficiency that compares AI and CV plots using the
> first 100 files for each run.
> AI is in red, CV is in black, and green is AI/CV.
>
>
> <Plot_04-21-2025_12.24.26_PM.png>
>
> Best regards
> Mathieu Ouillon
>
>
>
> On Apr 21, 2025, at 10:04, mhattawy at odu.edu <mohammad.hattawy at gmail.com>
> wrote:
>
> Hello Mathieu,
>    The luminosity data are cooked. The dst recon files can be found under
> /volatile/clas12/rg-l/lumi_scan/dst_with_atof/recon/
>
> if needed this is the beam currents for the different runs;
> 21464 lumi scan 50 nA
> 21465 lumi scan 100 nA
> 21468 lumi scan 150 nA
> 21469 lumi scan 200 nA
> 21471 lumi scan 250 nA
> 21472 lumi scan 300 nA
> 21473 lumi scan 350 nA
> 21475 lumi scan 400 nA
> 21476 lumi scan 400 nA
> 21478 lumi scan 450 nA
> 21479 lumi scan 500 nA
>
> Thanks,
> Mohammad.
>
> On Fri, Apr 18, 2025 at 2:04 PM Mathieu Ouillon <ouillon at jlab.org> wrote:
>
>> Hello Mohammad,
>>
>> Ok, I will do that as soon as the data are ready.
>>
>> Best regards
>> Mathieu Ouillon
>>
>> On Apr 18, 2025, at 14:01, mhattawy at odu.edu <mohammad.hattawy at gmail.com>
>> wrote:
>>
>> Hello Mathieu,
>>    Thanks for sharing the exact steps with us.
>> That would be nice of you if you runs them this time quickly.
>> We will notify you once that the data are cooked.
>>
>> Best regards,
>> Mohammad.
>>
>> On Fri, Apr 18, 2025 at 1:39 PM Mathieu Ouillon <ouillon at jlab.org> wrote:
>>
>>> Hello Mohammad and Noémie,
>>>
>>> The analysis of the luminosity scan is relatively straightforward. Here
>>> are the main steps:
>>> - First, use the aiTracking software developed by Raffaella:
>>> https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_raffaelladevita_aiTracking&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=xvIrZb1p8HoRayKD1Sz8zPzqi4-qHfiBCWqgj3oMbOQ&m=J2REbnPD2LTa-ln-2Z1SYsWnOGYCBS3_c8l3MgwIZethZaN4RtLPAOYYb781KL6E&s=loc9S8YHw9IZbG3yZdpKKNev4-VLN_pkqVsOk7kEGCc&e= 
>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_raffaelladevita_aiTracking&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=qHqRBgKtWsUDDWqxK25wcueyCpKNc_BlllfLAMbODJc&m=jF-pUBnpCoBN0jerbQ2hKlNIuSXAnVSiDPT1ZXpQlWlqatxSbcX94Vn-PNVIPB-B&s=GQwEiPnqWusocYiMv26p35yOQg7fbBN0lBp_bm4OrIs&e=>
>>>
>>> - Then, process each run at a different beam current using the following
>>> command:
>>> ./bin/aiTracking -plot 0 -o prefix
>>> /volatile/clas12/rg-l/production/path/to/the/luminosity/scan/.hipo
>>>
>>> - To generate the plots showing the slope, run:
>>> ./bin/aiTracking -histo 1 -lumi "2:data,5:data,10:data,20:data,40:data"
>>> 2nA_histo_file.hipo 5nA_histo_file.hipo 10nA_histo_file.hipo
>>> 20nA_histo_file.hipo 40nA_histo_file.hipo
>>>
>>> If you want, we can talk about it in a Zoom meeting, if you'd like more
>>> details.
>>> Or I can produce the plot this time to get things started.
>>>
>>> Best regards
>>> Mathieu Ouillon
>>>
>>>
>>> On Apr 18, 2025, at 11:29, mhattawy at odu.edu <mohammad.hattawy at gmail.com>
>>> wrote:
>>>
>>> Hello Mathieu and Lamiaa,
>>>     I believe Mathieu has done the analysis of the luminosity scans
>>> analysis for RG-E. Would you be able to help ALERT in doing this analysis
>>> on our data?
>>>
>>> Best regards,
>>> Mohammad.
>>>
>>>
>>>
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/alert_collaboration/attachments/20250421/a3181d96/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: RG-L_Lumi_scan_full_stats.png
Type: image/png
Size: 43471 bytes
Desc: not available
URL: <https://mailman.jlab.org/pipermail/alert_collaboration/attachments/20250421/a3181d96/attachment-0001.png>