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Re: CHALK RIVER
Subject:
Re: CHALK RIVER
Date:
Thu, 3 Apr 1997 07:15:37 -0700
From:
"DR.RESONANCE" <DR.RESONANCE-at-next-wave-dot-net>
To:
"Tesla List" <tesla-at-pupman-dot-com>
to: Barry Benson
Yes -- we are familar with the Chalk River apparatus. I think D.C.'s
cousin is the R. Cox that did a lot of the design and construction work.
There is a technical paper presented in Nature that has a lot of the
tech
data -- also some very good math on the subject of very tightly coupled
resonance transformers.
A good paper the rates with the Sloan paper. I also found out that
Sloan
was the designer of the lineac at Standford.
DR.RESONANCE-at-next-wave-dot-net
----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-poodle.pupman-dot-com
> Subject: CHALK RIVER
> Date: Tuesday,April 01,1997 6:18 PM
>
> Subject:
> CHALK RIVER
> Date:
> Tue, 01 Apr 1997 12:10:00 -0500 (EST)
> From:
> Benson_Barry%PAX5-at-mr.nawcad.navy.mil
> To:
> tesla-at-pupman-dot-com
>
>
> Hi Dr Resonance, All,
> Do you know anything about this experiment:
>
> "A TESLA TRANSFORMER HIGH-VOLTAGE
> GENERATOR
> BY C. R. J. HOFFMANN
> (ATOMIC ENERGY OF CANADA LIMITED,
> CHALK RIVER, ONTARIO, CANADA)
>
> REVIEW OF SCIENTIFIC INSTRUMENTS,
> VOLUME 46, # 1, JANUARY 1975
>
> A Tesla transformer similar to that suggested for
> transformer-type pulsed accelerators is described.
> The theory is outlined and computational results
> presented for representative losses under various
> conditions of tuning and coupling. The behaviour
> of an experimental transformer housed in an SF6
> -filled pressure vessel is discussed. The device
> has a tuning ratio of 1.1, a voltage coefficient of
> 0.85, and a coupling coefficient of 0.37. The
> influence of eddy currents induced in the
> pressure vessel wall on the coupling coefficient
> and tuning ratio is noted. The particular transformer
> described can provide a 2.5 MV peak at hte third
> half cycle of the secondary output voltage.
>
> (specs.: secondary diameter: 28.8 cm
> secondary length: 68 cm
> secondary turns: 1130 of # 30 magnet wire
> secondary turn separation: 0.03 cm (epoxy)
> secondary self inductance: 0.13H
> secondary winding resistance: 350 ohms (dc?)
> secondary self capacitance: 36 pF (with terminal)
> insulation: 4 atmospheres of SF6
>
> "The primary is mounted on a truncated
> conical lucite former, concentric with the
> secondary. Four turns of aluminum, 0.32
> cm thick and 11.4 cm wide, are spaced 2.5
> cm apart. The turns diameter varies from
> 43.6 cm at the bottom of the smallest turn
> to 71.6 cm at the top of the largest. The
> leads to and from the winding are arranged
> to be on top of the interturn connecting
> pieces, thereby making the inductance of
> the leads negligible. The winding self
> inductance is 6.7 uH.
>
> The primary capacity connects to the
> transformer through a switch via low
> impedance (~7 ohm) parallel-plate
> transmission line. The switch consists
> of two ignitrons connected in an
> antiparallel configuration and fitted
> with low inductance connections to
> the transmission line. The series
> resistance in the primary circuit
> (switch closed) is~ 0.15 ohms most
> of which is in the ignitrons. The primary
> capacitor is 0.68 uF and has low inductance.
>
> (primary capacitor is charged to 13 kV.)
>
> The author acknowledges useful discussions with J. A.
> Hulbert and the technical assistance of Mr. R. Cox in
> assembling and operating the experiment."
>
> ??????????????????????????????????????
>
> Barry