TY - GEN
T1 - Experimental Evidence for Suitability of Krypton as a Plasma Source for Two-Color Ionization Injection
AU - Vafaei-Najafabadi, Navid
AU - Kupfer, Rotem
AU - Petrushina, Irina
AU - Samulyak, Roman
AU - Cheng, Aiqi
AU - Pogorelsky, Igor
AU - Polyanskiy, Mikhail
AU - Babzien, Marcus
AU - Li, William
AU - Kusche, Karl
AU - Fedurin, Mikhail
AU - Palmer, Mark
AU - Zgadzaj, Rafal
AU - Downer, Michael
AU - Joshi, Chan
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022/1/1
Y1 - 2022/1/1
N2 - Two-color ionization injection is a promising method for realizing an all-optical plasma photocathode. In this method, a nonlinear plasma wakefield is driven by a long-wavelength laser, and the ionization injection inside this wake is initiated by a second, high-intensity laser pulse with a short wavelength. Recent upgrades at the Accelerator Test Facility (ATF) of the Brookhaven National Laboratory have enabled the delivery of a TW-class long-wave infrared (LWIR) CO2 laser pulse to the same interaction point as a TW-class near infrared (NIR) Ti:Sapphire laser. This combination provides an ideal opportunity for realizing the two-color ionization injection experiment. In addition to the required laser sources, a suitable plasma source must be selected. Previous research has identified noble gases such as krypton as a suitable source. The multiple ionization levels of such a noble gas allow the NIR laser to ionize deep shell electrons beyond the level that can be ionized by the LWIR laser. Time of flight spectrometer results supported by theory and simulations demonstrate the ability of focused Ti:Sapphire laser to ionize krypton beyond Kr+6 with laser energies as low as 1.7 mJ, This work lays the foundation towards the realization of the all-optical plasma photocathode experiments as the ATF facility continues upgrade efforts towards 10 TW, sub-ps CO2 pulses.
AB - Two-color ionization injection is a promising method for realizing an all-optical plasma photocathode. In this method, a nonlinear plasma wakefield is driven by a long-wavelength laser, and the ionization injection inside this wake is initiated by a second, high-intensity laser pulse with a short wavelength. Recent upgrades at the Accelerator Test Facility (ATF) of the Brookhaven National Laboratory have enabled the delivery of a TW-class long-wave infrared (LWIR) CO2 laser pulse to the same interaction point as a TW-class near infrared (NIR) Ti:Sapphire laser. This combination provides an ideal opportunity for realizing the two-color ionization injection experiment. In addition to the required laser sources, a suitable plasma source must be selected. Previous research has identified noble gases such as krypton as a suitable source. The multiple ionization levels of such a noble gas allow the NIR laser to ionize deep shell electrons beyond the level that can be ionized by the LWIR laser. Time of flight spectrometer results supported by theory and simulations demonstrate the ability of focused Ti:Sapphire laser to ionize krypton beyond Kr+6 with laser energies as low as 1.7 mJ, This work lays the foundation towards the realization of the all-optical plasma photocathode experiments as the ATF facility continues upgrade efforts towards 10 TW, sub-ps CO2 pulses.
KW - krypton
KW - Time of Flight (TOF)
KW - Two-color
UR - https://www.scopus.com/pages/publications/85216847229
U2 - 10.1109/AAC55212.2022.10822978
DO - 10.1109/AAC55212.2022.10822978
M3 - Conference contribution
AN - SCOPUS:85216847229
T3 - 2022 IEEE Advanced Accelerator Concepts Workshop, AAC 2022 - Proceedings
BT - 2022 IEEE Advanced Accelerator Concepts Workshop, AAC 2022 - Proceedings
PB - Institute of Electrical and Electronics Engineers
T2 - 20th IEEE Advanced Accelerator Concepts Workshop, AAC 2022
Y2 - 6 November 2022 through 11 November 2022
ER -