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Středa Březen 17 14:55:10 CET 2004


Podobny experiment jsem videl s zabou,
samo ze v televizi :(

Marek Pavlu

-----Original Message-----
From: owner-hw-news@list.gin.cz [mailto:owner-hw-news@list.gin.cz]On Behalf Of Pavel Nevrkla
Sent: Saturday, January 11, 2003 10:21 AM
To: hw-news@list.gin.cz
Subject: Re: Rezonancni prekvence beznych prvku pri NMR


Nevzpominam si dost dobre na podrobnosti, ale kdysi jsem v televizi videl
dokument ( odnekud z Ameriky ), meli tam civku, myslim ze supravodice,
kterou budili "vlastnim 20MW reaktorem?" ta civka byla s rozmery cca vyska
0,5m, sirka 0,5m,  dutina prumer tak do deseti cm. No a v te dutine se jim
vznasely plastovy koralky nebo tam dali myslim pavouka....Nevim kolik tesla
tam meli ???
----- Original Message -----
From: Petr Krc <pekr@magneton.cz>
To: <hw-news@list.gin.cz>
Sent: Saturday, January 11, 2003 6:28 AM
Subject: Re: Rezonancni prekvence beznych prvku pri NMR


> Marek Pavl? wrote:
> > Kdyz uz je tady rec o velkych magnetickych polich,
> > tak bych rad vedel, kolik T "soucasny clovek" maximalne dosahl.
> > Slysel jsem, ze neco zkouseji amici Los Alamos
> > (vlastne ani nevim, je-li to spravne psano).
> > Ale s parametry se nepochlubili.
>
> V Los Alamos (http://www.lanl.gov/mst/nhmfl/) delaji(li?) 'bezne' 60T.
> Ale jen v noci, protoze jinak by mistni rozvodna sit nevydrzela odber
> motoru, roztacejiciho setrvacnik, ktery akumuluje energii pro 2s
> proudovy puls:
> http://www.lanl.gov/mst/nhmfl/60TLP.html
>
> Po mnohem kratsi dobu (mikrosekundy) tam vsak dokazi udelat az 1000T:
> http://www.lanl.gov/mst/nhmfl/magnets.html
>
> Ovsem i to je nic proti tomuhle experimentu:
>
> --- cut ---
> RECORD-HIGH MAGNETIC FIELDS IN THE LAB, almost a Gigagauss in magnitude,
> have been achieved by aiming intense laser light at a dense plasma,
> expanding the possibilities for laboratory re-creations of astrophysical
> events. At last week's APS Division of Plasma Physics Meeting in Orlando
> (www.aps.org/meet/DPP02/baps/press/), researchers from Imperial College,
> London, and the Rutherford Appleton Lab in the UK announced evidence of
> super-strong magnetic fields that are hundreds of times more intense than
> any previous magnetic field created in an Earth laboratory and up to a
> billion times stronger than our planet's natural magnetic field. Such
> intense magnetic fields may soon enable researchers to recreate extreme
> astrophysical conditions, such as the atmospheres of neutron stars and
white
> dwarfs, in their very own laboratories.
> At the Rutherford Appleton Laboratory near Oxford in the UK, researchers
at
> the VULCAN facility aimed intense laser pulses, lasting only picoseconds
> (trillionths of a second), at a dense plasma. The resulting magnetic
fields
> in the plasma were on the order of 400 Megagauss. To determine the
magnitude
> of the fields, the researchers made polarization measurements of
> high-frequency light emitted during the experiment. Recent measurements
> presented at the APS/DPP conference suggested that the peak magnetic field
> in the densest region of the plasma approaches 1 Gigagauss. Due to
> technological advances peak laser intensities are likely to increase still
> further and consequently even higher magnetic fields may soon be possible,
> making it possible to put models of extreme astrophysical conditions to
the
> test. (Poster CP1.125, November 11, contact Karl Krushelnick, Imperial
> College, University of London, 011-44-20-7594-7635, kmkr@ic.ac.uk; for
> background see Tatarakis et al., Nature, 17 January 2002)
> --- cut ---
>
> --
> Regards
>            Petr Krc
>
>

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