From: Marco.Denicolai@tellabs.com
Date: Fri, 7 May 2004 08:17:08 +0300
Subject: RE: [TSSP] Measuring Thor (was: Modeling with ANSOFT)
Hello Boris, I think you got the idea. I emit, say, a series of 30 pulses (bangs) at 300 BPS and I record the current detected through the grounded stick. In correspondence of a certain bangs the reading jumps over 3A. Then I know the discharge has hit the stick. I collect this data for 3-4 voltages and 60 cm to 2.2 m distance. When the leader hits the stick the current grows from bang to bang. There is also some current employed when the streamers scratch the "stick", without "holding". I just have to draw the line somewhere and I draw it at 3A. The full brekdown appears much later and the current is much higher, as you tell in your email. In a few days I'm going to have the Pearson probe and the grounded stick shielded. Then I'll be able to take better measurements. Best Regards > -----Original Message----- > From: petkovic7@yahoo.com [mailto:petkovic7@yahoo.com] > Sent: 6. toukokuuta 2004 13:52 > To: tssp@abelian.demon.co.uk > Subject: Re: [TSSP] Measuring Thor (was: Modeling with ANSOFT) > > > > Hi Marco, > > > > The "stick reached" condition was detected with a > > Pearson current probe > > measuring the stick current to ground. The hit > > condition was set to a > > current of at least 3 A. Sadly the probe was > > capturing also a sensible > > fraction of the Efield. My understanding of the > > problem is that the > > stick was capturing also the Efield and creating a > > current to ground. > > > ------ > I known my question will not be of much help but have > you tried to measure peak currents stick-ground when > Thor discharge attached to the grounded stick?These > sudden currents may be very large.Excuse my > question,maybe I just don't understand experimental > set-up (again). > > kind regards, > Boris > > > > > > __________________________________ > Do you Yahoo!? > Win a $20,000 Career Makeover at Yahoo! HotJobs > http://hotjobs.sweepstakes.yahoo.com/careermakeover > ----------------------------------------- ============================================================ The information contained in this message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any reproduction, dissemination or distribution of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. Thank you. Tellabs ============================================================
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.