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electrostatic_calculations [2015/12/02 13:50]
perezlou [Gating grid] 		electrostatic_calculations [2016/08/30 13:21]
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.
 {{ ::geometry.png?300 |}} {{ ::geometry.png?300 |}}
 == Dimensions of the chamber == == Dimensions of the chamber ==
Line 15: Line 15:
   *Gating grid placed 2 cm above the MICROMEGAS detector   *Gating grid placed 2 cm above the MICROMEGAS detector
 ==== Electrostatic Potential and Drift Lines ==== ==== Electrostatic Potential and Drift Lines ====
-{{ :lines.png?300 | Gatind grid off}} +{{ :lines.png?300 | Gating grid off}} 
-{{ :lines_on.png?300 | Gatind grid on}}+{{ :lines_on.png?300 | Gating grid on}}
 ==== Electrostatic Field and Drift Lines ==== ==== Electrostatic Field and Drift Lines ====
 {{ :e_fielddec2015.png?300 |Electrostatic field magnitude}} {{ :e_fielddec2015.png?300 |Electrostatic field magnitude}}
 {{ :e_field2_dec.png?300 | Electrostatic field uniformity in X direction }} {{ :e_field2_dec.png?300 | Electrostatic field uniformity in X direction }}
 ==== Gating grid ==== ==== Gating grid ====
- 
 {{gg_wiki_off.png?300 | Bias Off}} {{gg_wiki_off.png?300 | Bias Off}}
 +{{gg_wiki_on.png?300 |Bias On}}
   *65 Wires 100 um diameter   *65 Wires 100 um diameter
   *2mm pitch    *2mm pitch 
   *placed 1 cm from micromesh   *placed 1 cm from micromesh
   *-200 V   *-200 V
-{{gg_wiki_on.png?300 |Bias On}}+=== Garfield Simulations === 
 +Gating grid off\\ 
 +{{:gg_garfieldl_unbiased.png?300|}} 
 +{{:gg_garfield_potential_unbiased.png?300|}} 
 + 
 +Gating grid on 2mm pitch 20V\\ 
 +{{:gg_garfield_potential.png?300|}} 
 +{{:gg_garfield_drift.png?300|}} 
 + 
 +Gating grid on 2mm pitch 40V\\ 
 +{{:gg_garfield_potential_40.png?300|}} 
 +{{:gg_garfield_drift40.png?300|}} 
 + 
 +Gating grid on 1mm pitch 20V\\ 
 +{{:gg_garfield_potential_1mm.png?300|}} 
 +{{:gg_garfield_drift_1mm.png?300|}} 
 + 
 +Gating Grid Transparency Calculation\\ 
 +{{ :gg_transmission.png?300 |}} 
 + 
 +==== PCB Electrodes field calculations ==== 
 +Calculation of the electrostatic field in the Anode electrodes, with and without an embedded electrode. 
 +{{ :electrodes.png?300 |}} 
 +Results available in {{:electrodes.pdf|}} 
electrostatic_calculations.txt · Last modified: 2016/08/30 13:21 by perezlou

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