Difference between revisions of "Shielding hut for GEM electronics"

Revision as of 10:26, 8 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,

• 12GEp_Elevation [1]
• 12GEp_Iso [2]
• 12GEp_Plan [3]

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 is a 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 here the shielding hut and supporting frame appear on the g4sbs at the moment - [6]

• 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.
  • Dose = <math>\sum \frac{\text{edep} (MeV)}{Volume (cm^2) \times}</math>