Details

Autor(en) / Beteiligte

• Yan, Jiayang
• Iapozzuto, Pietro
• Flament, Mael
• Joshi, Chan
• Jing, Yichao
• Kumar, Prabhat
• Samulvak, Roman
• Pogorelsky, Igor
• Swinson, Christina
• Babzien, Marcus
• Kusche, Karl
• Polyanskiy, Mikhail
• Fedurin, Mikhail
• Palmer, Mark
• Mori, Warren B.
• Zgadzaj, Rafal
• Welch, James
• Downer, Michael
• Lu, Wei
• Litvinenko, Vladimir
• Vafaei-Najafabadi, Navid
• Amorim, Ligia Diana

Titel

Investigating Instabilities of Long, Intense Laser Pulses in Plasma Wakefield Accelerators

Ist Teil von

• 2018 IEEE Advanced Accelerator Concepts Workshop (AAC), 2018, p.1-5

Ort / Verlag

IEEE

Erscheinungsjahr

2018

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• Laser wakefield acceleration (LWFA) is a promising method for reducing the cost and size of the state of the art and industrial accelerators. In the recent AE71 experimental campaign at the Brookhaven National Laboratory, a long (4 ps) powerful (300 GW) CO 2 laser pulse was sent into a hydrogen gas to produce plasma wakefields. We analyzed the evolution of the laser numerically and found three distinct regions: where the laser self-modulates, where it is transversely disrupted, and where it self-channels. The laser disruption process is similar to the hosing instability that occurs in particle-beam-driven plasma wakefield accelerators. Although hosing instability has been well studied for particle-driven acceleration, the similar instability for long laser pulses has not been clearly explained, and a technique to prevent it is still lacking. Our numerical simulations were done with Particle-In-Cell code OSIRIS. Here we show the impact that plasma ionization and laser focal position have on the interaction of the laser with the plasma in the three distinct regions.