Luis, What is your pulse being discharged into? You seem to have quite a large lo= ad impedance assuming 50A refers to your peak current. Unless you are chang= ing the load, how is the current going to increase to 140A or do I misunder= stand your intentions? What is your pulse shape? Faster transitions will su= rely mean that inductances in the entire system will be important (includin= g in the capacitors). I built a 25 Tesla pulsed magnet years ago. That used only 6kV (limitation = was 7.5kV if I recall correctly) to produce a 50ms rise time pulse of 1.6kA= in a cryo cooled solenoid coil. Pulse rise time was determined by L and C.= Pulse fall time was lengthened by a diode clamp with fall time being deter= mined by L/R. Overall pulse length was ~1s. You are not giving much info, b= ut if you add more capacitors you will likely increase the pulse length for= a given load. How well you should match them inductance wise really depend= s on the pulse shape I think. Incidentally, how do you already discharge these? Joe P.S. Regarding safety issues, I had my capacitor bank, charging system, dis= charge circuit and magnet coil, isolated in a separate room with the doors = interlocked. Was storing ~200kJ in that bank! While not charging, there was= a large 50 Ohm resistor connected across the bank. This also served as a c= harge dump should an abort be needed. All was remote controlled and for the= record a PIC16F54 was involved... Your safety situation is obviously complicated by the higher voltages, but = the principle of isolation holds be it an isolated room or container. -----Original Message----- From: piclist-bounces@mit.edu On Behalf Of AB Pea= rce - UKRI STFC Sent: Wednesday 25 September 2019 09:52 To: Microcontroller discussion list - Public. Subject: RE: [EE] Capacitor Bank upgrade > How is the pulse duration controlled? Is there a pulse-forming network > (inductors) or a resistor or some kind of active current control? I would expect the caps to be pulse rated, as they are already used in this= application for 18 years ... :) The easiest way to limit pulse rise time is by using straight wire as an in= ductor, although for 30ms pulses this will probably be too small to matter.= I have certainly seen photographic flash guns where the length of wire bet= ween the capacitor and tube was controlled for exactly this purpose. It may= be that for Luis' purpose some air would coils between capacitors will slo= w down the transfer of energy enough. As for capacitors to purchase, I would attempt to buy more of the ones used= in the existing kit, as these have proved themselves. -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclis= t --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .