pulse forming line

[mmmob...@gmail.com]

Hi all,
does anyone know about pfl in this group, i googled some but didn't get
useful information, it is for shaping and compressing hv pulses to sub
nanosecond one (fast rise time..)
how about some diagram,schematic.
thanks in before

[Andrew Holme]

<mmmob...@gmail.com> wrote in message
news:1157189209.9...@74g2000cwt.googlegroups.com...

http://www.holmea.demon.co.uk/Avalanche/Avalanche.htm

[John Woodgate]

In message <1157189209.9...@74g2000cwt.googlegroups.com>, dated
Sat, 2 Sep 2006, mmmob...@gmail.com writes

It's just a short-circuited transmission line. You feed it pulses and
the reflection coming back from the short-circuit is equal, opposite and
delayed with respect to the input pulse. So you see at the input a pulse
which is as long as the line delay, not the original pulse length.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

[mmmob...@gmail.com]

please look at this pfl and say where is input/output and ground and is
it a coaxial line or several pipes. whats the order of connections.

[mmmob...@gmail.com]

sorry, i forgot to paste address, here it is:

http://www.awe.co.uk/main_site/scientific_and_technical/featured_areas/hydrodynamics_contents/pulsed_power_tech/ppt_xray_machine/ppt-b2/index.html

[Andrew Holme]

<mmmob...@gmail.com> wrote in message
news:1157189209.9...@74g2000cwt.googlegroups.com...

The 2nd Google hit looks like a pretty good reference:

http://pps.coe.kumamoto-u.ac.jp/streaming/PulsedPower/generator/PFL1.htm

[John Woodgate]

In message <1157198172.0...@i42g2000cwa.googlegroups.com>,

dated Sat, 2 Sep 2006, mmmob...@gmail.com writes

>sorry, i forgot to paste address, here it is:
>
>http://www.awe.co.uk/main_site/scientific_and_technical/featured_areas/h
>ydrodynamics_contents/pulsed_power_tech/ppt_xray_machine/ppt-b2/index.ht
>ml

One cannot tell from a picture. You had best ask the maker, or search
out Alan Blumlein's patent (from the hundreds he was granted).

[mmmob...@gmail.com]

i saw that one but the diagrams are not clear to me, can you tell more
about blumlein one.
soory for throwing problem to you.
Best regards

[John Larkin]

google "nonlinear transmission line" and "shock line", and maybe look
up McEwan's patents, stuff like

http://www.freepatentsonline.com/5804921.html

John

[Andrew Holme]

Top-posting fixed:

<mmmob...@gmail.com> wrote in message
news:1157203112.6...@e3g2000cwe.googlegroups.com...

> Andrew Holme wrote:
>> <mmmob...@gmail.com> wrote in message
>> news:1157189209.9...@74g2000cwt.googlegroups.com...
>> > Hi all,
>> > does anyone know about pfl in this group, i googled some but didn't get
>> > useful information, it is for shaping and compressing hv pulses to sub
>> > nanosecond one (fast rise time..)
>> > how about some diagram,schematic.
>> > thanks in before
>> >
>>
>> The 2nd Google hit looks like a pretty good reference:
>>
>> http://pps.coe.kumamoto-u.ac.jp/streaming/PulsedPower/generator/PFL1.htm
>
>i saw that one but the diagrams are not clear to me, can you tell more
> about blumlein one.
> soory for throwing problem to you.
> Best regards

I agree. It's a poor explanation.

This is much better: http://home.btconnect.com/akldb/PDF/Blumlein.pdf