[Primexd] PrimEx D preparation

[Ilia Larin]

 Hi Matt,

 thank you for offering the computing power. For now I got a permission to use special GlueX account,
 which should solve current needs. I really appreciate your offer!

 For the details of algorithm I am attaching the short article describing the main ideas.
 For now I am not using its power to resolve merged showers since it is not tuned and we don't need
 good a reconstruction efficiency to calibrate: if I found merged clusters I am just skipping them.
 The algorithm takes "seed" and all surrounded connected modules with hits and apply relatively small correction for incomplete
 transverse shower integration to the total energy. For coordinates it takes the seed channel and nearby ones with log energy weight.
 I used 200MeV threshold to the cluster energy and 80MeV to the "seed" energy, min number of hits = 2 and
 very rough cluster chi2 cut which, I guess didn't have an impact. For timing I selected only hits
 with the time relative to RF in the interval of 4...36ns. For filling calibration histograms I also
 apply ed slightly increased energy cut for cluster and pair of two clusters (couple of sets per channel).
 I think it is an interesting matter with the outer peaks and it deserves some time to investigate,
 even though I think I already have an answer what is it actually.
 I will keep in touch with Colin, I can provide the correction table what I have right now if it is an urgent matter,
 otherwise I would spend few more days to possibly correct outer layers gains.
 Hope it helps.

 Thank you,
 Ilya


----- Original Message -----
From: "Matthew Shepherd" <mashephe at indiana.edu>
To: "Ilya Larin" <ilarin at jlab.org>
Cc: "Alexander Somov" <somov at jlab.org>, primexd at jlab.org
Sent: Saturday, November 17, 2018 8:41:19 AM
Subject: Re: [Primexd] PrimEx D preparation

Ilia,



You mentioned yesterday that you are in need of computing.  We'd be happy to let you use our cluster here at Indiana U. if that would help.  It is relatively small:  ~500 cores, but you'll be able to use almost all of it yourself.  We should have some 5-10 TB of scratch disk available to hold your raw data samples.  GlueX software stack is also installed there.



Please let me know if you want to pursue this and I can put in the request with our sysadmin.  Also send me the path to your files and I'll make the Globus transfer request.



Cheers,



Matt



(I mentioned this yesterday at the meeting, but I'm not sure anyone heard me.)





> On Nov 16, 2018, at 3:44 PM, Ilia Larin <ilarin at jlab.org> wrote:

> 

> 

> 

> Hi Sasha,

> I am attaching pdf file about what I managed to see within these few days.

> 

> All the best,

> Ilya

> 

> ----- Original Message -----

> From: "Alexander Somov" <somov at jlab.org>

> To: gluex-collaboration at jlab.org

> Cc: primexd at jlab.org

> Sent: Thursday, November 15, 2018 11:03:39 PM

> Subject: [Primexd] PrimEx D preparation

> 

> Dear Colleagues,

> 

> We are going to start discussing aspects critical for the PrimEx D 

> experiments, such as

> 

> - performance of the FCAL, luminosity determination, etc. 

> 

> during some of our weekly PrimEx D meeting. So far, we have mostly been 

> focused on construction details of the Compton Calorimeter. The next meeting 

> will take place tomorrow (November 16) in Hall D counting room at 4 pm.  

> 

> BlueJeans connection: https://urldefense.proofpoint.com/v2/url?u=https-3A__www.bluejeans.com_7572695553&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=x0sjgSswZQ_HDkubMW6WSw&m=cTW7gQAnAXyAS3ZMgTSAksBhvfUSPi693qvDk2uzzpE&s=Er_EmmqMD3hi4muHxfKYkj13zA9LJhtsLxaVIQUAC8U&e= 

> Meeting ID: 7572695553

> 

> The main topic for discussions:

> 

> - calibration of the FCAL 

> 

>   (some significant progress has been done in this direction, you will be 

>                           surprised to see … )

> 

> The meeting page will be available shortly.

> 

> 

> -------- 

> 

> We have created a mailing list  primexd at jlab.org for future communications. 

> In order to subscribe, send an email to:   

> 

> primexd-request at jlab.org

> 

> Subject: subscribe

> 

> 

> 

> Cheers,

>       Sasha

> 

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