La macchina fotografica più veloce del mondo.

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Io ero rimasto ai picosecondi=10^-12 secondi sui 14,7nm
http://www.llnl.gov/str/Dunn.html

Home-Built X-Ray Laser?
The following is from a recent paper: "Generation of millijoule-level soft-x-ray laser pulses at a
4-Hz repetition rate in a highly saturated tabletop capillary discharge amplifier",
C. D. Macchietto, B. R. Renware, and J. J. Rocca, Optics Letters, vol. 24, no. 16, pp, 1115-1117, August, 1999.


Basically, this system was quite simple. It had a 0.32 mm ID aluminum oxide capillary evacuated
to roughly half a Torr filled with argon gas, pre-ionize by a discharge.
It was pulsed with a high current pulse (approximately 26 kiloamps!) with a fast (40 ns) rise time
using a water capacitor and series spark gap switch. The water served as both the dielectric of the capacitor
and as cooling for the capillary. The capacitor was charged by a 4 stage Marx generator located in a separate box.
The laser itself occupied an area of only about .4 x 1 m (16 x 40 inches).
Since the laser operates in a highly saturated regime, no cavity optics are required.
The output beam profile had a ring shape (due to plasma density gradients in the plasma column)
with a half-angle divergence of about 4.6 mR. The output energy averaged about .88 mJ at 4 Hertz.

1 mJ X-ray laser, operate at 4 or 5 pps. Short wavelength X-rays: 15 nm.

Cavolo ero rimasto proprio indietro.
E i ricercatori sono andati ben avanti.

Complimenti ai nostri ricercatori cavolo 150 attosecondi(10^-18secondi)=1,5 10^-16 secondi !!!!

Bellissima questa discussione!


Se qualcuno conosce le unita' di misura della viscosita' , per favore
mi da' una mano in: http://www.hwupgrade.it/forum/showthread.php?t=1343505
Grazie mille ciao