Eletrostatics of MWPC

Short Document

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• Electric Field and Potential of a infinite single wire
• Capacitance of Lecher Wire
• Capacitance ,Potential and Electric Field for MWPC
• Capacitance between two strips
• Equation for Current in Conductor
• Surface Registance
• Potential Drop

Potential and Field of Thin Gap Chamber

• wire spacing : 1.8mm
• wire to cathode gap : 1.4mm
• wire diameter : 50um
• HV : 3.1kV

25um wire diamiter and 1.6kV HV

• wire spacing : 1.8mm
• wire to cathode gap : 1.4mm
• wire diameter : 25um
• HV : 1.6kV

Capacitance between Strips

Unit length capacitacne between 4cm wide strips on a 1.6mm
thick FR4 board(relative dielectricity is 5) is calculated for
changing the strip distance.Three lines represents for calculation
based on Lecher wire approximation(20,40,80um diameter).

Unit length capacitacne between 2mm gap strips on a 1.6mm
thick FR4 board(relative dielectricity is 5) is calculated for
changing the strip width.