@article{MTMT:34836411,
	title = {Systematic comparison of commercial devices for temporal characterization of few-cycle laser pulses in the 500-1000 nm spectral range},
	url = {https://m2.mtmt.hu/api/publication/34836411},
	author = {Pajer, Viktor and Bohus, János and Malakzadeh Fard Khangheshlaghi, Abdollah and Lehotai, Levente and Kalashnikov, Mikhail and Seres, Imre and Gilicze, Barnabás and Kiss, Bálint and Börzsönyi, Ádám and Varjú, Katalin and Szabó, Gábor and Nagymihály, Roland Sándor},
	doi = {10.1364/OE.509583},
	journal-iso = {OPT EXPRESS},
	journal = {OPTICS EXPRESS},
	volume = {32},
	unique-id = {34836411},
	issn = {1094-4087},
	abstract = {We compare multiple temporal pulse characterization techniques in three different pulse duration regimes from 15 fs to sub-5 fs, as there are no available standards yet for measuring such ultrashort pulses. To accomplish this, a versatile post-compression platform was developed, where the 100 fs near infrared pulses were post-compressed to the sub-two-cycle regime in a hybrid, three-stage configuration. After each stage, the duration of the compressed pulse was measured with the d-scan, TIPTOE and SRSI techniques and the retrieved temporal intensity profiles, spectrum and spectral phases were compared. Spectral homogeneity was also measured with an imaging spectrometer to understand the input coupling conditions of the temporal measurements. Our findings suggest that the different devices give similar results in terms of temporal intensity profile, however they are extremely sensitive to alignment and to beam quality, especially in the case of the shortest pulses. We address specific steps of measurement procedures, which paves the way towards the standardization of pulse characterization in the near future.},
	year = {2024},
	pages = {15710-15722},
	orcid-numbers = {Pajer, Viktor/0000-0003-2770-510X; Bohus, János/0000-0003-1749-4142; Malakzadeh Fard Khangheshlaghi, Abdollah/0000-0003-4864-2697; Varjú, Katalin/0000-0001-6577-7417; Szabó, Gábor/0000-0001-6756-4677}
}

@article{MTMT:34552784,
	title = {The investigation of diesel soot emission using instrument combination of multi-wavelength photoacoustic spectroscopy and scanning mobility particle sizer},
	url = {https://m2.mtmt.hu/api/publication/34552784},
	author = {Ajtai, Tibor and Utry, Noémi and Pintér, Máté and Abdul, Rahman and Kurilla, Boldizsár and Sárossy, Gábor and Deák, László and Baladincz, Jenő and Raffai, Péter and Szabó, Gábor and Bozóki, Zoltán},
	doi = {10.1038/s41598-024-52832-8},
	journal-iso = {SCI REP},
	journal = {SCIENTIFIC REPORTS},
	volume = {14},
	unique-id = {34552784},
	issn = {2045-2322},
	abstract = {The parallel measurements of wavelength dependent optical absorption, particle number size distribution have made by a multi wavelength photoacoustic spectrometer (4λ-PAS) and scanning mobility particle sizer (SMPS) respectively at different modes of a diesel engine using two different types of fuel. The thermal evolution of the emission was also investigated using posterior temperature treatment of emission. The bimodal size distribution of emitted particles at a set reference temperature has been observed regardless of the applied fuel at idle. However, the emitted particulate assembly had lognormal size distribution falls into the accumulation mode at all other defined engine modes and both fuel types. The total number- and volume concentration (TNC and TVC) showed retrograde tendency with the increasing torque and rpm independently of the applied fuel types. The TNC values decreased up to 50% for both fuels with engine operation changes from idle engine mode(em#1) to low engine mode(em#2). With further increase in torque and rpm of engine, the change in TNC is negligible. On the other hand, the TVC remains more or less the same for idle to low engine mode transition and increased more than 60% for high mode (em#3) transition. The Optical Absorption Coefficient (OAC) values measured at the operational wavelengths of the 4λ-PAS instrument decreased at all wavelengths with increasing rpm and torque. The wavelength dependency quantified by Aerosol Ängström Exponent (AAE) was applied here for qualitative analysis of the carbonaceous emission and showed decreased values towards the higher engine speed and torque output of the engine. The proposed technique can be used as real-time, precise and accurate measurement of light absorption by DPM aerosols, which opens up novel possibilities for the volatility and thermal evolution investigation of diesel emissions.},
	year = {2024},
	eissn = {2045-2322},
	orcid-numbers = {Kurilla, Boldizsár/0000-0002-7109-3107; Szabó, Gábor/0000-0001-6756-4677}
}

@article{MTMT:34506400,
	title = {Compensation of composition variation-induced sensitivity changes in gas phase photoacoustics},
	url = {https://m2.mtmt.hu/api/publication/34506400},
	author = {Végh, Panna and Gulyás, G. and Huszár, Helga and Ajtai, Tibor and Szabó, Gábor and Szabó, Anna and Bozóki, Zoltán},
	doi = {10.1016/j.infrared.2023.105116},
	journal-iso = {INFRARED PHYS TECHN},
	journal = {INFRARED PHYSICS & TECHNOLOGY},
	volume = {137},
	unique-id = {34506400},
	issn = {1350-4495},
	abstract = {Infrared photoacoustic (PA) spectroscopy is a widely used technique to monitor trace gas concentration changes during industrial processes where the bulk composition may vary considerably. However, the PA signal is prone to changes in bulk composition, leading to relative uncertainties in measurements of up to 10%, due to the complex dependence of the sensitivity of a PA system (S) on the thermal and acoustic properties of the gas sample. A novel calibration and concentration calculation method is proposed to keep the relative accuracy of the PA measurements in the few percentages range even in case of large-scale composition variations. The main novelty of the proposed method is that it tackles the complex dependence of the PA system's sensitivity in a way that while it varies the resonance frequency of the calibration gas, it keeps the heat capacity ratio of calibration gases at a constant value. We prove that it determines the analyte's concentration with relative accuracy of about 1 %, even when the composition of the gas varies drastically. It rigorously compensates for the frequency and heat capacity ratio dependence of S and for the dependence of the half-width of the resonance curve of the PA cell on the thermal and acoustic properties of the gas. Although the reported demonstration measurements are executed in a relatively simple gas mixture, the proposed method has widespread applicability in high-precision monitoring. © 2024 The Authors},
	keywords = {Sensitivity analysis; CALIBRATION; uncertainty analysis; Gases; specific heat; photoacoustic spectroscopy; Photoacoustic effect; Acoustic properties; Photoacoustic systems; Photoacoustics; Bulk compositions; Gas phase; Relative accuracy; heat capacity ratio; heat capacity ratio; Gas-phases; Composition variation; Acoustics property; Novel calibration methodology; Novel calibration methodology; Calibration gas; Calibration methodologies},
	year = {2024},
	eissn = {1879-0275},
	orcid-numbers = {Szabó, Gábor/0000-0001-6756-4677}
}

@{MTMT:34859572,
	title = {Recent Progress of ELI-ALPS SYLOS Systems},
	url = {https://m2.mtmt.hu/api/publication/34859572},
	author = {Csontos, János and Tóth, Szabolcs and Stanislauskas, T. and Balciunas, I. and Adamonis, J. and Lengvinas, D. and Tóth, László Tamás and Somoskői, Tamás and Geetha, P. P. and Nagymihály, Roland Sándor and Lopez-Martens, Rodrigo and Szabó, Gábor and Varjú, Katalin and Börzsönyi, Ádám},
	booktitle = {Laser Congress 2023 (ASSL, LAC)},
	doi = {10.1364/ASSL.2023.AW5A.2},
	unique-id = {34859572},
	abstract = {The SYLOS 1kHz OPCPA systems are the main drivers for attosecond and particle secondary sources at ELI-ALPS. Over the recent years, several upgrades increased their overall performance for the benefit of external user community.},
	year = {2023},
	orcid-numbers = {Csontos, János/0000-0003-2785-536X; Tóth, Szabolcs/0000-0002-8516-3962; Somoskői, Tamás/0000-0003-1696-4085; Lopez-Martens, Rodrigo/0000-0001-6788-7791; Szabó, Gábor/0000-0001-6756-4677; Varjú, Katalin/0000-0001-6577-7417}
}

@{MTMT:34857048,
	title = {25 Hz and 10 Hz operation of the HF-2PW laser of ELI ALPS at the 400 TW level},
	url = {https://m2.mtmt.hu/api/publication/34857048},
	author = {Nagymihály, Roland Sándor and Bohus, János and Pajer, Viktor and Lehotai, Levente and Malakzadeh Fard Khangheshlaghi, Abdollah and Bussiere, B. and Falcoz, F. and Kalashnikov, Mikhail and Varjú, Katalin and Szabó, Gábor and Neacsu, C. and Paul, P.-M. and Börzsönyi, Ádám},
	booktitle = {Laser Congress 2023 (ASSL, LAC)},
	doi = {10.1364/ASSL.2023.AM3A.2},
	unique-id = {34857048},
	abstract = {Results on the long-term operation of the HF-2PW laser of ELI ALPS at 2.5 Hz and 10 Hz repetition rates will be presented at the compressed energy of 10 J with <25 fs pulse duration.},
	year = {2023},
	orcid-numbers = {Bohus, János/0000-0003-1749-4142; Pajer, Viktor/0000-0003-2770-510X; Malakzadeh Fard Khangheshlaghi, Abdollah/0000-0003-4864-2697; Varjú, Katalin/0000-0001-6577-7417; Szabó, Gábor/0000-0001-6756-4677}
}

@CONFERENCE{MTMT:34754831,
	title = {Felszín és légkör közötti ammónia és dinitrogén-oxid kicserélődés vizsgálata fotoakusztikus spektroszkópiával},
	url = {https://m2.mtmt.hu/api/publication/34754831},
	author = {Szabó, Anna and Gombi, Csilla and Király, Csaba and Horváth, László and Huszár, Helga and Szabó, Gábor and Bozóki, Zoltán},
	booktitle = {A Magyar Tudományos Akadémia Analítikai és Környezetkémiai Bizottságának 11. Környezetkémiai Szimpóziuma. (2023)},
	unique-id = {34754831},
	year = {2023},
	pages = {-},
	orcid-numbers = {Szabó, Gábor/0000-0001-6756-4677}
}

@misc{MTMT:34720564,
	title = {Soot selective size distribution measurement using PhotoAcoustic Spectroscopy (PAS). A demonstrative study},
	url = {https://m2.mtmt.hu/api/publication/34720564},
	author = {Hodovány, Szabolcs and Ajtai, Tibor and Martin, Schnaiter and Szabó, Gábor and Bozóki, Zoltán},
	unique-id = {34720564},
	year = {2023},
	orcid-numbers = {Szabó, Gábor/0000-0001-6756-4677}
}

@article{MTMT:34489471,
	title = {The petawatt laser of ELI ALPS: reaching the 700 TW level at 10 Hz repetition rate},
	url = {https://m2.mtmt.hu/api/publication/34489471},
	author = {Nagymihály, Roland Sándor and Falcoz, Franck and Bussiere, Benoit and Bohus, János and Pajer, Viktor and Lehotai, Levente and Ravet-Senkans, Muriel and Roy, Olivier and Calvez, Steven and Mollica, Florian and Branly, Stephane and Paul, Pierre-Mary and Börzsönyi, Ádám and Varjú, Katalin and Szabó, Gábor and Kalashnikov, Mikhail},
	doi = {10.1364/OE.509615},
	journal-iso = {OPT EXPRESS},
	journal = {OPTICS EXPRESS},
	volume = {31},
	unique-id = {34489471},
	issn = {1094-4087},
	abstract = {Performance of the novel high repetition rate HF-PW laser system of ELI ALPS is presented in its first operation phase at 400 TW and 700 TW levels. Long-term operation was tested at 2.5 and 10 Hz repetition rates, where an exceptional 0.66% and 1.08% shot-to-shot energy stability was demonstrated, respectively. Thorough spatio-spectral and temporal measurements confirmed high quality output pulses with a Strehl ratio of >0.9 after compression at both repetition rates. Amplified pulses with an unprecedentedly high 240 W average power were reached for the first time from a PW-class amplifier chain by using novel pseudo-active mirror disk amplification-based pump lasers.},
	year = {2023},
	pages = {44160-44176},
	orcid-numbers = {Bohus, János/0000-0003-1749-4142; Pajer, Viktor/0000-0003-2770-510X; Varjú, Katalin/0000-0001-6577-7417; Szabó, Gábor/0000-0001-6756-4677}
}

@{MTMT:34413308,
	title = {First Operation Phase of the 10 Hz 2 PW Laser of ELI ALPS},
	url = {https://m2.mtmt.hu/api/publication/34413308},
	author = {Nagymihály, Roland Sándor and Bohus, János and Pajer, Viktor and Malakzadeh Fard Khangheshlaghi, Abdollah and Lehotai, Levente and Bussiere, Benoit and Falcoz, Franck and Ravet-Senkans, Muriel and Roy, Olivier and Paul, Pierre-Mary and Börzsönyi, Ádám and Varjú, Katalin and Szabó, Gábor and Kalashnikov, Mikhail},
	booktitle = {2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)},
	doi = {10.1109/CLEO/Europe-EQEC57999.2023.10231672},
	unique-id = {34413308},
	year = {2023},
	orcid-numbers = {Bohus, János/0000-0003-1749-4142; Pajer, Viktor/0000-0003-2770-510X; Malakzadeh Fard Khangheshlaghi, Abdollah/0000-0003-4864-2697; Varjú, Katalin/0000-0001-6577-7417; Szabó, Gábor/0000-0001-6756-4677}
}

@misc{MTMT:34146195,
	title = {Gázmintavételezés nélküli fotoakusztikus rendszerek légköri ammónia- és vízgőzfluxus mérésekhez},
	url = {https://m2.mtmt.hu/api/publication/34146195},
	author = {Szabó, Anna and Torma, Péter and Gombi, Csilla and Horváth, László and Huszár, Helga and Weidinger, Tamás and Szabó, Gábor and Bozóki, Zoltán},
	unique-id = {34146195},
	year = {2023},
	orcid-numbers = {Szabó, Gábor/0000-0001-6756-4677}
}