Megaimpulse NPG-10/100k User Manual Download | Manualshive

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NANOSECOND PULSE GENERATOR

NPG-10/100k (NPG-10/100kN)

USER MANUAL

v. 1.0

© 2021 Megaimpulse Ltd.

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Summary of Contents for NPG-10/100k

Page 1: ...NANOSECOND PULSE GENERATOR NPG 10 100k NPG 10 100kN USER MANUAL v 1 0 2021 Megaimpulse Ltd ...

Page 2: ...R ERROR IN THIS MANUAL OR PRODUCT SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR INFORMATION ONLY AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY MEGAIMPULSE LTD MEGAIMPULSE LTD ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL INCLUDING THE PRODUCTS AND SOFTWARE DESCRI...

Page 3: ...and rear panels view 5 Operation description 6 Front panel in detail 7 Putting the generator into operation 9 Triggering of the generator 11 Output SYNC pulse 17 Overheat mode 18 Fuse replacement 19 Warranty 20 Appendix A List of preset repetition rates and number of pulses within a burst 21 User manual of NPG 10 100k NPG 10 100kN 1 ...

Page 4: ...e following items NPG 10 100k NPG 10 100kN nanosecond pulse generator hereinafter generator Power supply cable High voltage output coaxial cable User manual Fig 1 General view of NPG 10 100k NPG 10 100kN nanosecond pulse generator MEGAIMPULSE LTD 2 ...

Page 5: ...ing Teflon parts are lubricated by silicone grease When adding or removing the generator to or from the system ensure that the power supply ON OFF switch is turned off and or power supply cable is unplugged before the output cable is connected or disconnected Please connect or disconnect any equipment toggle the generator from internal to external triggering mode or vice versa while the generator ...

Page 6: ...lse width FWHM 7 ns Pulse energy regulated within 5 mJ 10 mJ 50 steps Peak pulse power up to 1 6 MW Operation modes continuous burst single pulse modes internal and external triggering Continuous mode repetition rates from 1 Hz to 10 kHz internal triggering from single pulse to 10 kHz external triggering Burst mode repetition rates number of pulses in burst up to 100 kHz up to 10000 pulses within ...

Page 7: ...r of pulses in burst 4 digit display 5 Frequency and number of pulses in burst regulation knob with push button 6 BNC type SYNC OUT connector 7 BNC type SYNC IN connector 8 Overheat LED indicator 9 Output pulse energy 2 digit display 10 Output pulse energy regulation knob with push button 11 Power supply ON OFF switch 12 Power supply connector and fuse holder 13 Fans 14 Ground terminal 14 User man...

Page 8: ... to 10000 Therefore the maximum operation frequency in continuous mode is 10 kHz Higher repetition rates are available in burst mode only The following operation parameters can be set by the front panel controls FREQUENCY from 1 Hz to 101 kHz the default value is 100 Hz NUMBER OF PULSES in the burst within one second interval from 1 to 10000 the default value is 1000 Output PULSE ENERGY from 50 to...

Page 9: ...r external triggering modes LED lights off if the button is pushed and no external triggering pulses are applied LED blinks with 1 Hz frequency in case of successful external triggering Internal triggering mode is activated in the pushing back state Red LED on the button lights on and indicates immediate triggering when HV system is activated by HV ON OFF button Four digit LED display and control ...

Page 10: ...nd again to switch back into PULSE ENERGY mode If the internal temperature exceeds a safe level then OVERHEAT LED lights on and the generator stops the operation It may occur in case of high ambient temperature insufficient cooling or after long time operation at high amplitude and high repetition rate HV ON OFF button is blocked while the generator is overheated Please stay the generator in idle ...

Page 11: ...ischarge inside Attach the cable connector to the generator front panel connector 1 The tight and firm contact of the connectors is important for the safe operation of the generator Even a small air gap between the connectors may result in a glow discharge arcing and damage to the generator and the cable The following procedure is recommended for obtaining good and tight contact 1 Align both conne...

Page 12: ...ischarge between the central wire and the cable braid across the cable solid polyethylene insulator See Fig 2 You may use additional wires for connection to the load Solder the high voltage load contact to the central cable wire and screw solder ground load contact to the ground cable clamp Please keep the length of the wires between the coaxial cable and the load as short as possible More than 10...

Page 13: ...he generator by HV ON OFF switch After that you can switch off the generator by the power switch After a long time of operation at high pulse amplitude and frequency please allow fans to rotate several minutes in idle mode for cooling TRIGGERING OF THE GENERATOR The generator can operate in internal and external triggering operation modes Internal triggering The internal triggering mode is set whe...

Page 14: ...ULSES parameters Please set the required values by FREQUENCY knob The generator can operate in burst enable mode also Long triggering pulse generates a burst of pulses with repetition rate set by FREQUENCY parameter The external triggering pulse fed to SYNC IN connector works as enable signal in this case HV pulses are generated continuously until the level of the triggering pulse becomes low The ...

Page 15: ...lses burst length CH2 green line shows the output pulses on SYNC OUT connector Fig 4 Internal triggering burst mode FREQUENCY sets 100 kHz repetition rate NUMBER OF PULSES sets 60 pulses burst length CH2 green line shows the output pulses on SYNC OUT connector User manual of NPG 10 100k NPG 10 100kN 13 ...

Page 16: ...n line shows SYNC OUT pulses CH3 blue line shows the triggering pulses fed to SYNC IN connector Fig 6 External triggering burst mode External triggering pulses CH3 blue line set 60 kHz repetition rate and 2 pulses in a burst CH2 green line shows SYNC OUT pulses MEGAIMPULSE LTD 14 MEGAIMPULSE LTD 14 ...

Page 17: ...st SYNC IN triggering pulse duration CH3 blue line defines the burst length of 25 pulses Fig 8 External triggering burst enable mode Two SYNC IN pulses CH3 blue line define two bursts of 10 pulses each FREQUENCY parameter sets 100 kHz frequency within the bursts User manual of NPG 10 100k NPG 10 100kN 15 ...

Page 18: ... limits the total number of pulses and reduces the length of the second burst to 3 in spite of a longer external triggering pulse Fig 10 External triggering burst enable mode The pairs of SYNC IN pulses CH3 blue line set the pair bursts of output pulses CH2 green line MEGAIMPULSE LTD 16 ...

Page 19: ...a source of strong interference Therefore one can see the noise on the oscillogram at the moment of the output pulse generation The delay between the rising edge of the triggering pulse and the output pulse is about 1 µs Fig 11 Oscillogram of SYNC OUT pulse Channel 2 cyan line The pulse amplitude is 3 V on 50 Ohm load and 5 V on high impedance load The pulse width is 400 ns The delay between the r...

Page 20: ...erheating of the generator OVERHEAT LED lights on in this case and the generator stops the operation HV ON OFF push button is turned off automatically and disabled Please stay the generator in idle mode for several minutes and allow the fans to cool it OVERHEAT LED would light off when the temperature decreases and returns within the safe range The generator is ready for the operation again MEGAIM...

Page 21: ...ly connector Please use a flat screwdriver or another suitable tool to remove the fuse holder see Fig 12 Fig 12 Removing the fuse holder with a flat screwdriver There are two fuses in the fuse holder including one spare see Fig 13 Fig 13 Two fuses in the fuse holder including one spare upper in the figure User manual of NPG 10 100k NPG 10 100kN 19 ...

Page 22: ... to determine the warranty period and condition The generator has warranty seals on the front and rear panels see Fig 14 Removing the warranty seals terminates the warranty Fig 14 Warranty seals on the front and rear panels MEGAIMPULSE LTD 20 ...

Page 23: ... Hz 0 060 9 5 kHz 009 5 70 Hz 0 070 10 kHz 010 0 80 Hz 0 080 15 kHz 015 0 90 Hz 0 090 20 kHz 020 0 100 Hz 0 100 25 kHz 025 0 200 Hz 0 200 30 kHz 030 0 300 Hz 0 300 35 kHz 035 0 400 Hz 0 400 40 kHz 040 0 500 Hz 0 500 45 kHz 045 0 600 Hz 0 600 50 kHz 050 0 700 Hz 0 700 60 kHz 060 0 800 Hz 0 800 70 kHz 070 0 900 Hz 0 900 80 kHz 080 0 1 kHz 001 0 90 kHz 090 0 1 5 kHz 001 5 100 kHz 100 0 2 kHz 002 0 10...

Page 24: ...0700 3 0003 800 0800 4 0004 900 0900 5 0005 1000 001 0 6 0006 1500 001 5 7 0007 2000 002 0 8 0008 2500 002 5 9 0009 3000 003 0 10 0010 3500 003 5 20 0020 4000 004 0 30 0030 5000 005 0 40 0040 5000 005 0 50 0050 6000 006 0 60 0060 7000 007 0 70 0070 8000 008 0 80 0080 9000 009 0 90 0090 10000 010 0 100 0100 200 0200 300 0300 400 0400 500 0500 the default value is 1000 pulses which is set after powe...

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