Difference between revisions of "Shielding hut for GEM electronics"
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* 12GEp_Plan [https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/12GEp_Plan.png] | * 12GEp_Plan [https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/12GEp_Plan.png] | ||
| − | Few extra details from Alan, | + | Few extra details from Alan Gavalya, |
* The green boxes are cast steel 52" x 52" x 26". | * The green boxes are cast steel 52" x 52" x 26". | ||
* The distance between two green boxes are 96". | * The distance between two green boxes are 96". | ||
| − | * There | + | * There are two steel plates between two green boxes (bottom-2.5" thick & front-7.5" thick). The bottom plate allows for the front plates to match the height of the green blocks for stacking the top plates. |
* And there is a steel plate (120" x 5" x 43") on the top (blue). | * And there is a steel plate (120" x 5" x 43") on the top (blue). | ||
The drawings for the magnet support frame (by Alan) -[https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/A00000-15-05-0201%20revA%20sht1-6.pdf] | The drawings for the magnet support frame (by Alan) -[https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/A00000-15-05-0201%20revA%20sht1-6.pdf] | ||
| − | The supporting frame and the | + | The supporting frame and the shielding hut were added to the g4sbs/src/G4SBSHArmBuilder.cc - [https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/G4SBSHArmBuilder.cc], See under MakeHCAL. |
| − | And | + | And this is how the shielding hut and supporting frame appear on the g4sbs - [https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/GEMElec_bg_study_MAR17.pdf]. See page 3 & 4. |
| + | [[Image:shielding_hut.png]] | ||
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| − | * First, we wanted to compare the gamma yields with Pavel's to cross-check the overall normalization. | + | * First, we wanted to compare the gamma yields with Pavel Degtiarenko's to cross-check the overall normalization. |
| − | ** | + | ** These are the latest plots from Pavel's [https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/st_e11000_th40cm_a1%281%29.pdf]. These simulations include exact GEp target configuration (40 cm Liquid H2 + Al walls). |
| − | ** And this is what we got by running our simulations [https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/Yields_Compared_to_Pavels_NewSim_with_vacuum.pdf]. Each slide shows the results from g4sbs (on top - when the hall | + | ** And this is what we got by running our simulations [https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/Yields_Compared_to_Pavels_NewSim_with_vacuum.pdf]. Each slide shows the results from g4sbs (on top - when the hall is filled with Air (left) and Vacuum (right) and on the bottom - results from Pavel's when the hall is in vacuum.) |
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** To do that, we defined a volume inside the hut and made it a sensitive detector. | ** To do that, we defined a volume inside the hut and made it a sensitive detector. | ||
** And filled it with air (and water), and calculate the dose based on energy deposited on that volume. | ** And filled it with air (and water), and calculate the dose based on energy deposited on that volume. | ||
| + | <math>\text{Dose } (rad) = \sum \frac{\text{edep }(MeV)}{\text{Volume }(cm^2) \times \text{Density } (gcm^{-3}) \times 6.24\times 10^7 } </math> | ||
| + | where 6.24x10^7 is the conversion factor of '''MeV/g''' to '''rad'''. | ||
| + | ----------------- | ||
| + | ----------------- | ||
| + | * Finally, we want to calculate the neutron-induced damage inside the shielding hut. | ||
| + | ** The effective damage to silicon detectors relative to 1 MeV neutron can be found at [http://arxiv.org/pdf/1207.3743.pdf]. See figure 1. | ||
Latest revision as of 09:53, 9 September 2016
The main purpose of this study to determine the neutron-induced damage on electronics at the shielding hut for GEp.
Main drawings for the shielding hut are,
Few extra details from Alan Gavalya,
- The green boxes are cast steel 52" x 52" x 26".
- The distance between two green boxes are 96".
- There are two steel plates between two green boxes (bottom-2.5" thick & front-7.5" thick). The bottom plate allows for the front plates to match the height of the green blocks for stacking the top plates.
- And there is a steel plate (120" x 5" x 43") on the top (blue).
The drawings for the magnet support frame (by Alan) -[4]
The supporting frame and the shielding hut were added to the g4sbs/src/G4SBSHArmBuilder.cc - [5], See under MakeHCAL.
And this is how the shielding hut and supporting frame appear on the g4sbs - [6]. See page 3 & 4.
- First, we wanted to compare the gamma yields with Pavel Degtiarenko's to cross-check the overall normalization.
- These are the latest plots from Pavel's [7]. These simulations include exact GEp target configuration (40 cm Liquid H2 + Al walls).
- And this is what we got by running our simulations [8]. Each slide shows the results from g4sbs (on top - when the hall is filled with Air (left) and Vacuum (right) and on the bottom - results from Pavel's when the hall is in vacuum.)
- Next thing on the list is to calculate the energy deposited/dose/dose rate inside the shielding hut.
- To do that, we defined a volume inside the hut and made it a sensitive detector.
- And filled it with air (and water), and calculate the dose based on energy deposited on that volume.
<math>\text{Dose } (rad) = \sum \frac{\text{edep }(MeV)}{\text{Volume }(cm^2) \times \text{Density } (gcm^{-3}) \times 6.24\times 10^7 } </math>
where 6.24x10^7 is the conversion factor of MeV/g to rad.
- Finally, we want to calculate the neutron-induced damage inside the shielding hut.
- The effective damage to silicon detectors relative to 1 MeV neutron can be found at [9]. See figure 1.
![[1]](https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/12GEp_Elevation.png){kind=link}
![[2]](https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/12GEp_Iso.png){kind=link}
![[3]](https://userweb.jlab.org/~dasuni/GEM_Electronic_hut/12GEp_Plan.png){kind=link}