From: Marco Denicolai
Date: Tue, 19 Jun 2001 09:46:54 +0300
Subject: Re: [TSSP] Some Considerations
Hello all, Malcolm Watts wrote: > Where were you going to position the divider? Off-axis to the coil? We are talking about a 2-3 m high "tower": it is usually connected to the target with an aluminium rod, supported by a rope hanging from the roof (roof is maybe 10 m high). > Also, I wanted to eliminate as far as possible any loading effects. I > was thinking of resistance of several GOhm. I believe capacitive dividers are really purely capacitive (not a compensated resistive divider). >If we could get some > accurate measurement under disruptive conditions but not necessarily > at an arbitrarily high power level I think it would be reasonable to > extrapolate the result under non-breakout conditions at least as it > is possible to accurately quantify the secondary energy under those > msmt conditions. If we recall that "disruptive" doesn't necessarily imply streamer formation (with streamer loading, uncertainty, and all what follows), we can run the measurement at a medium power level, thus avoiding extra streamers leaving the aluminium rod. > > > It would be also a matter of choice to retune the coil to compensate for > > the tuning ratio shift or just to ignore it, as that is modeled too. > > It seems to me that this is a chicken and egg situation. We want to > verify models so incorporating a model as part of the verification > process seems self-defeating. Yes? The capacitive divider is a fairly simple device. It should be possible to make a trustable model of it in five minutes. At least to a degree of precision good enough for our purposes. It's a device used for precision measurements, not a home-made low-budget toy like I have got at home. We are basically looking for its capacitance (I guess), not its resistive part. Regards -- _____________________________________________________________ Marco Denicolai Senior Design Engineer Tellabs Oy tel: +358 9 4131 2769 DSL Products mobile: +358 50 353 9468 Sinikalliontie 7 fax: +358 9 4131 2410 02630 Espoo FINLAND email: marco.denicolai@tellabs.com _____________________________________________________________
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.