The compact pulsed power source includes pulse capacitor

pulse transformer and spiral pulse forming line（PFL）.The pulse transformer is designed to be spiral strip pulse transformer with part magnetic core.Its coupling coefficient and energy transmitting coefficient is very high.The calculation and selection of the transformer’s parameters were illuminated carefully

and its insulation design was introduced.The forming line uses spiral Blumlein PFL.Its middle conductor is spiral and the inner and outer are cylinder.The design method and theoretical calculation of the spiral PFL are explained.The pulsed power source designed is compact.Its length is less than 2.5 m

and diameter is less than 0.6 m.The design results are that output voltage peak is above 650 kV on 10 Ω load

rise time is less than 30 ns

and pulse width is about 95 ns.The primary experiment confirms partly the design of the pulse power source.