Samenvatting
For the acceleration of ultra high-brightness electron bunches, accelerating gradients of
1—2 GV/m have been achieved using a pulsed DC accelerator. To accelerate to higher energies, it would be desirable to extend this concept in a multi-stage configuration. To do this, and still maintain a high average accelerating gradient, it is necessary to switch the high-voltage pulses in less than 10 ps. A way to achieve this is to create a line focus between two electrodes using a high power femtosecond laser. At laser intensities above approximately l0~ W1m2 tunneling ionization causes near-instantaneous ionization
of a complete plasma channel between the electrodes, Because of the instantaneous ionization and high degree of ionization in the plasma channel, picosecond switching precision can be achieved in a properly designed matched geometry. This concept was tested using a prototype switch consisting of two coaxial transmission lines, interrupted by a 1 mm gap. One of the transmission lines was charged to 4.5 kV.
A fcmtosecond Ti:Sapphire laser was used to close the switch. Using cylindrical optics, a line focus was created between the electrodes to form the conducting channel, At high power (~0.2 TW) the jitter between the laser and the front of the transmitted high-voltage pulse was less than 15 Ps.
Originele taal-2 | Engels |
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Titel | Proceedings of the 15th International Conference on High-Power Particle Beams (BEAMS 2004) 18-23 July 2004, Saint Petersburg, Russia |
Redacteuren | G. Mesyats |
Plaats van productie | Saint Petersburg |
Pagina's | 2013-243/246 |
Status | Gepubliceerd - 2004 |
Evenement | 15th International Conference on High-Power Particle Beams (BEAMS 2004) - Saint Petersburg, Rusland Duur: 18 jul. 2004 → 23 jul. 2004 Congresnummer: 15 |
Congres
Congres | 15th International Conference on High-Power Particle Beams (BEAMS 2004) |
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Verkorte titel | BEAMS 2004 |
Land/Regio | Rusland |
Stad | Saint Petersburg |
Periode | 18/07/04 → 23/07/04 |
Ander | 15th International Conference on High-Power Particle Beams (BEAMS 2004), Saint Petersburg, Russia |