PRELIMINARY:

Energy misreco:

Maarten: misreconstruction of energy is related to ommitance of delta-ray contributions. Not sure how this will change the plot on slide 23 of Lodewijk, but it has a sizeable effect.
The delta-ray contribution has a logarithmic dependence on the energy of the muon.

Brían's combined fit will bypass the current PID.

Could be interesting to have a continuous PID and use it as another fit parameter in MONA.

Maarten: Can we define the analytical derivatives for the oscillation probabilities and use it to speed up MONA?

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Brían:

Noone has investigated the input parameters for JMuon so far.
I have looked at the time-window before.
The roadwidth is what I studied next.

There is a sweet spot between 50 and 80.

I have also studied combinations of input parameters, for example combinations of the roadwidth and time-window.

The E_max does not make a big difference.

I have also looked at the 'resolution' parameter, which is the final step size in your minimization procedure.

There is also the parameter zmin, which I have not checked yet. At the moment it is set to -3.

Maarten: Would really be in favor of moving the roadwidth from 50m to 80 m.

In addition to the work above, I have one more plot on the combined likelihoods.
I can now look at every single event.

Timon:

Yesterday I told that I found a discrepancy between the PDF and mc-truth of 2.0.'
This issue has been resolved.
Thinking of now moving to higher energy MC, for example to MuPage files.

I would also like to move from MC-hits to real hits, but I am not yet sure how my study transfers.

Maarten: look at the hits, sample from the PDF and subtract the contribution of a MIP to determine the position of Brehmsstrahlung-showers.
 

Timon: What I am doing at the moment is discretizing the track longitudinal profile in steps of 5m and assume a shower in each bin and evaluate the corresponding hit probabilities. Should see a clear dip at the position of a bremsstrahlung shower.

Maarten: Would advize to use smaller step size than 5m, but this sounds like a good approach.

Timon: Is there already a way to implement current fitting algorithms?

Brían: Not yet.

Jordan: I can show you how

Jordan:

The toy-MC is being pushed to AAnet.
It is contained in the rec2-folder.

Maarten: Just for my understanding: this is a toy-MC that generates hits, correct?

Jordan: Correct. There is the possibility to generate hits corresponding to a certain event file. But there is also the possibility to generate random hits.

Reco for JSirene still breaks down.
 

Valentin:

Not that much to say.
Working on the energy reconstruction.

Was also looking at a way to convert a ToT to a number of photo-electrons.

Maarten: in the new productions for each hit there is already a field A, which contains the number of photo-electrons (ToT -> npe conversion is already done for you in the new productions).
We are also working on including the dynamic position calibration in the hits.

Maarten:

How prepared are we for rerunning separate reconstruction-stages on processed data?

Valentin: I am currently working with the offline file-formats (evt files).