HV Pulse Generators

Custom specific equipment for diverse applications

SVM-630A, pulse generator for medical application
SVM-630A, pulse generator for medical application

Magnet Power Supply
Custom tailored pulse generator for medical applications

Poynting GmbH has built and delivered a custom specific designed pulse generator for MedAustron, a centre for ion therapy and research in Austria, close to Vienna. The delivered pulse generator SVM-630A controls four kicker magnets which are used to either lead the particle beam from synchrotron ring to irradiation rooms or into a dumping block. In this way the beam chopper is used to switch the beam in the irradiation room on and off, thus the switching function of the pulse generator is used to dose the beam as the medical front end demands. The second main function of the pulse generator is to ensure that the current will be switched off within a specified time limit (here ≤ 250 μs) by all means, in particular at failure situations or emergency stop during beam operation.

tl_files/poynting/content/Homepage-Elemente/pdf.png Read more details in: wepma002.pdf

Technical data

Measured current pulse (solid red: magnetcurrent, dashed blue: deviation from ideal current) [wepma002.pdf], validation of pulse specifications.

Mains input


Nominal input voltage 400

400 VAC

Mains frequency

50 Hz

Maximum input current

50 A

Absolute maximum ratings


Type of output current

 pulsed, DC

Maximum repetition rate (normal operation)

20 Hz

Maximum repetition rate (burst)

2 kHz

Maximum output current

630 A

Maximum output terminal voltage

1500 V

Maximum average output voltage

70 V

Load specification


Typical inductance

345μH (+-20%)

Typical resistance

32mΩ (+-30%)


Pulse frequency 

fmax DC to 20 Hz  

Current amplitude range

Iprog  100 A – 630 A  

Current setting resolution 

Ires 1 A  

Current ramp shape  


non-linearity dependent load inductance and resistance


Δpeak ≤2.5% peak to peak current ripple on flat top

Settling time

tsettle 400 μs from trigger to stable operation within

Maximum current rise time

trise <250 μs typical load, 630 A, 95%, incl. trigger delay

Maximum current fall time

tfall <250 μs typical load, 630 A, 10%, incl. trigger delay

Maximum current overshoot

Iover 5% of set value typical load

Emergency shutdown at failure (safety-related, concerning waveform)


Peak to peak current ripple on flat top of output current > 3 %


Current overshoot of output current > 5 %


Time from reception of start trigger until at least 95 % of output current > 250 μs


Time from reception of stop trigger until at most 10 % of output current > 250 μs