Rakowski R, Barna A, Suta T, Bohus J, Földes I B, Szatmári S, Mikołajczyk J, Bartnik A, Fiedorowicz H, Verona C, Verona Rinati G, Margarone D, Nowak T, Rosiński M, Ryć L
Department of Experimental Physics, University of Szeged, 6720 Szeged, Dóm tér 9, Hungary.
Wigner Research Centre for Physics, Institute for Particle and Nuclear Physics, EURATOM Association HAS, 1121 Budapest, XII. Konkoly Thege Miklós út 29-33, Hungary.
Rev Sci Instrum. 2014 Dec;85(12):123105. doi: 10.1063/1.4902346.
Investigations of emission of harmonics from argon gas jet irradiated by 700 fs, 5 mJ pulses from a KrF laser are presented. Harmonics conversion was optimized by varying the experimental geometry and the nozzle size. For the collection of the harmonic radiation silicon and solar-blind diamond semiconductor detectors equipped with charge preamplifiers were applied. The possibility of using a single-crystal CVD diamond detector for separate measurement of the 3rd harmonic in the presence of a strong pumping radiation was explored. Our experiments show that the earlier suggested 0.7% conversion efficiency can really be obtained, but only in the case when phase matching is optimized with an elongated gas target length corresponding to the length of coherence.
