| Hector and Hector+ arrangement [message #17043] |
Thu, 17 July 2014 11:42  |
mlcortes
Messages: 41
Registered: July 2014
Location: Darmstadt
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continuous participant |
From: *ikp.physik.tu-darmstadt.de
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Hallo!
I am looking for the arrangement of the Hector and Hector+ detectors around the target chamber.
Does anybody have it?
Li^2
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| Re: Hector and Hector+ arrangement [message #17321 is a reply to message #17044] |
Fri, 19 September 2014 16:19  |
thuyuk
Messages: 68
Registered: July 2014
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continuous participant |
From: *ific.uv.es
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Hi Riccardo,
Thanks for sharing the position documents. Below, I would like understand better some points regarding to the setup in 2012.
What is the (0,0,0) reference point for these positions? It doesn't seem to me that the target nominal position is at their "0" point, am I right? I see that the four LaBr detectors that stand next to AGATA are around 23 cm away from the reference point towards LYCCA in the y-axis in the coordinate system of your document (in the z axis in the FRS' coordinate system, if I'm not wrong). But we know that AGATA is placed around the target nominal position, and in this case the Hector detectors should always take negative y-axis values, shouldn't they?
Anyways, are r and theta parameters calculated regarding to the front face of the detectors or to their geometrical centroid? I see inside the "new_prespec_Go4" analysis code (the one that was provided "officially" by GSI) the theta angles are different than these ones. Is this just because the reference points are different in both cases?
Sorry for asking too many questions!
Tayfun
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| Re: Hector and Hector+ arrangement [message #17323 is a reply to message #17322] |
Fri, 19 September 2014 17:57 |
thuyuk
Messages: 68
Registered: July 2014
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continuous participant |
From: *ific.uv.es
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Hi Riccardo,
Thanks for the additional explanation.
Please find below the angles found in the "old" new_prespec_go4 code:
double ThetaBaF[8]={2.478,2.478,2.478,2.478,1.536,1.536,1.536,1.536}; //For BaF
double ThetaLaBr[10]={1.187,1.187,1.187,1.187,1.536,1.536,1.536,1.536,2.478,2.4 78};//For the LaBr
Therefore, the HECTOR detectors use their own reference point, is this correct? Do you have the theta angles converted into the frame where the target nominal position is at (0,0,0)? Do you think the angels above are already the ones in the "target frame".
Thanks!
Tayfun
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| Re: Hector and Hector+ arrangement [message #17345 is a reply to message #17344] |
Wed, 24 September 2014 11:10 |
thuyuk
Messages: 68
Registered: July 2014
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continuous participant |
From: *ific.uv.es
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Hi Michael,
In fact, I have done some improvements in the calculation of the particle trajectory, taking into account also the target's forward position. In other words, in this algorithm, I don't make the traslation of the x-y plane of Ta-DSSSD, but I make the projection of it at a given distance by ztarget_offset in the par file.
I tried to be put it in parallel with the DopplerCorrection.cpp inside the AGATA plugin, which seems to work fine for AGATA, but I faced with a problem in case of the HECTOR Scintillators that I'm already familiar with and still not able to solve it :/
So, maybe you can take a look and help me to understand what is wrong. You may find it in the attachment.
The error message I get is:
prespec/process/Processor.cpp:629: const double& prespec::process::Processor::input_value(int): Assertion `inputs_.size() > channel' failed.
Thank you in advance!
Tayfun
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