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electrostatic_calculations [2015/12/02 12:19] perezlou |
electrostatic_calculations [2016/08/30 13:21] (current) perezlou [PCB Electrodes field calculations] |
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====== Electrostatic Calculations ====== | ====== Electrostatic Calculations ====== | ||
- | We performed electrostatic calculation with Elmer FEM code to chech the uniformity of the drift field in the field cage and look for potential sparking points. | + | We performed electrostatic calculation with Elmer FEM code to check the uniformity of the drift field in the field cage and look for potential sparking points. |
+ | {{ :: | ||
+ | == Dimensions of the chamber == | ||
+ | *32 cm long | ||
+ | *17cm diameter | ||
+ | == Dimensions of the field cage == | ||
+ | *14 cm diameter | ||
+ | *1.5 cm separation from the gas chamber | ||
+ | *3 cm separation between cathote and the chamber | ||
+ | == Characteristics of the cage == | ||
+ | *Flexible Kapton field cage with copper electrodes printed on one side | ||
+ | * 83 equipotential strips (3 mm wide 0.5 mm gap) | ||
+ | *Drift field 200 V/cm | ||
+ | *Gating grid placed 2 cm above the MICROMEGAS detector | ||
+ | ==== Electrostatic Potential and Drift Lines ==== | ||
+ | {{ : | ||
+ | {{ : | ||
+ | ==== Electrostatic Field and Drift Lines ==== | ||
+ | {{ : | ||
+ | {{ : | ||
+ | ==== Gating grid ==== | ||
+ | {{gg_wiki_off.png? | ||
+ | {{gg_wiki_on.png? | ||
+ | *65 Wires 100 um diameter | ||
+ | *2mm pitch | ||
+ | *placed 1 cm from micromesh | ||
+ | *-200 V | ||
+ | === Garfield Simulations === | ||
+ | Gating grid off\\ | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | Gating grid on 2mm pitch 20V\\ | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | Gating grid on 2mm pitch 40V\\ | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | Gating grid on 1mm pitch 20V\\ | ||
+ | {{: | ||
+ | {{: | ||
+ | |||
+ | Gating Grid Transparency Calculation\\ | ||
+ | {{ : | ||
+ | |||
+ | ==== PCB Electrodes field calculations ==== | ||
+ | Calculation of the electrostatic field in the Anode electrodes, with and without an embedded electrode. | ||
+ | {{ : | ||
+ | Results available in {{: |