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

[Stepan Stepanyan]

Mohammad,

Thanks, looks nice. So, even at this stage, RGL is at the same level as RGA pass 2. Further improvements in calibration and AI training will make things look better.

Regards,
Stepan

On Apr 21, 2025, at 4:56 PM, mhattawy at odu.edu <mohammad.hattawy at gmail.com> wrote:

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<mailto: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<mailto: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<mailto:mhattawy at odu.edu> <mohammad.hattawy at gmail.com<mailto: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<mailto: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<mailto:mhattawy at odu.edu> <mohammad.hattawy at gmail.com<mailto: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<mailto: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://github.com/raffaelladevita/aiTracking<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<mailto:mhattawy at odu.edu> <mohammad.hattawy at gmail.com<mailto: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.




<RG-L_Lumi_scan_full_stats.png>

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