CH(A) Radical Formation in Coulomb Explosion from Butane Seeded Plasma Generated with Chirp-Controlled Ultrashort Laser Pulses
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2024
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| author | Mogyorosi, Karoly Toth, Balint Sarosi, Krisztina Gilicze, Barnabas Csontos, Janos Somoskoi, Tamas Toth, Szabolcs Geetha, Prabhash Prasannan Toth, Laszlo Taylor, Samuel S. Skoufis, Nicholas Barron, Liam Varga, Kalman Covington, Cody Chikan, Viktor |
| author_facet | Mogyorosi, Karoly Toth, Balint Sarosi, Krisztina Gilicze, Barnabas Csontos, Janos Somoskoi, Tamas Toth, Szabolcs Geetha, Prabhash Prasannan Toth, Laszlo Taylor, Samuel S. Skoufis, Nicholas Barron, Liam Varga, Kalman Covington, Cody Chikan, Viktor |
| contents | We experimentally studied the formation of CH(A) radicals in butane seeded plasma generated with chirp-controlled ultrashort laser pulses (\(\sim 760 \, μ\text{J}/\text{pulse}\), 890 nm, 1 kHz, 8 fs). The focused beam with high peak intensity (\(\sim 10^{14} - 10^{16} \, \text{W/cm}^2\)) caused Coulomb explosion (CE). The time dependent emission spectra were observed with the Fourier-transform Visible spectroscopy (FTVis) step-scan method. The average signal intensity decreased with the chirp in the Ar\(^+\) > C\(_2\) > H-\(α\) \(\sim\) CH(A) order with a plateau for CH(A) in the \(-200\) to \(-100 \, \text{fs}^2\) range. The short rise time of the CH(A) emission signal, the monoexponential emission decay, and the nearly constant rotational and vibrational temperatures of the CH(A) radicals (\(\sim 3000 \, \text{K}\) and \(\sim 3800 \, \text{K}\)) all support their formation as a primary product. Our TDDFT calculations predict that CH and many other fragments can be formed beyond CE at \(\sim 7 \times 10^{14} \, \text{W/cm}^2\) intensity. The average charge of CH (+0.6) and its relative abundance (0.5\%) support the formation of detectable CH(A) within 120 fs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_18121 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | CH(A) Radical Formation in Coulomb Explosion from Butane Seeded Plasma Generated with Chirp-Controlled Ultrashort Laser Pulses Mogyorosi, Karoly Toth, Balint Sarosi, Krisztina Gilicze, Barnabas Csontos, Janos Somoskoi, Tamas Toth, Szabolcs Geetha, Prabhash Prasannan Toth, Laszlo Taylor, Samuel S. Skoufis, Nicholas Barron, Liam Varga, Kalman Covington, Cody Chikan, Viktor Chemical Physics Plasma Physics We experimentally studied the formation of CH(A) radicals in butane seeded plasma generated with chirp-controlled ultrashort laser pulses (\(\sim 760 \, μ\text{J}/\text{pulse}\), 890 nm, 1 kHz, 8 fs). The focused beam with high peak intensity (\(\sim 10^{14} - 10^{16} \, \text{W/cm}^2\)) caused Coulomb explosion (CE). The time dependent emission spectra were observed with the Fourier-transform Visible spectroscopy (FTVis) step-scan method. The average signal intensity decreased with the chirp in the Ar\(^+\) > C\(_2\) > H-\(α\) \(\sim\) CH(A) order with a plateau for CH(A) in the \(-200\) to \(-100 \, \text{fs}^2\) range. The short rise time of the CH(A) emission signal, the monoexponential emission decay, and the nearly constant rotational and vibrational temperatures of the CH(A) radicals (\(\sim 3000 \, \text{K}\) and \(\sim 3800 \, \text{K}\)) all support their formation as a primary product. Our TDDFT calculations predict that CH and many other fragments can be formed beyond CE at \(\sim 7 \times 10^{14} \, \text{W/cm}^2\) intensity. The average charge of CH (+0.6) and its relative abundance (0.5\%) support the formation of detectable CH(A) within 120 fs. |
| title | CH(A) Radical Formation in Coulomb Explosion from Butane Seeded Plasma Generated with Chirp-Controlled Ultrashort Laser Pulses |
| topic | Chemical Physics Plasma Physics |
| url | https://arxiv.org/abs/2410.18121 |