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PFN & closing switch

PFN & closing switch. Can use high current SCR switch ( e.g FHCT as per MKD) Switch voltage determined by magnet current and system impedance Fall-time determined by magnet inductance and system impedance (L/Z). PFN & closing switch. Double magnet power supply possible

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PFN & closing switch

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  1. PFN & closing switch • Can use high current SCR switch (e.g FHCT as per MKD) • Switch voltage determined by magnet current and system impedance • Fall-time determined by magnet inductance and system impedance (L/Z)

  2. PFN & closing switch • Double magnet power supply possible • Switch may need development for 60us operation

  3. Opening/Closing switch and Freewheel resistor • Need high voltage open/close switch (e.g IGCT, limited to ~4kA peak current, or IGBT in parallel/series) • Fall-time determined by magnet inductance and FW resistor • Switch voltage (maximum < 30kV?) determined by magnet current and fall-time

  4. Opening/Closing switch and Freewheel resistor • Single magnet power supply only • Switch may need development for 60us operation Outside vacuum magnet, vert aperture =85mm

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