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The electroexcitation amplitudes or $\gamma_vpN^*$ electrocouplings of the$N(1440)1/2^+$, $N(1520)3/2^-$, and $\Delta(1600)3/2^+$ resonances wereobtained for the first time from the $ep \to e'\pi^+\pi^-p'$ differential crosssections measured with the CLAS detector at Jefferson Lab within the range ofinvariant mass $W$ of the final state hadrons from 1.4--1.7 GeV for photonvirtualities $Q^2$ from 2.0--5.0 GeV$^2$. The electrocouplings were determinedin independent fits of the $\pi^+\pi^-p$ cross sections within threeoverlapping $W$ intervals with a substantial contribution from each of thethree resonances listed above. Consistent results on the electrocouplingsextracted from the data in these $W$ intervals provide evidence for theirreliable extraction. These studies extend information on the electrocouplingsof the $N(1440)1/2^+$ and $N(1520)3/2^-$ available from this channel over abroader range of $Q^2$. The electrocouplings of the $\Delta(1600)3/2^+$, whichdecays preferentially into $\pi\pi N$ final states, have been determined forthe first time. Our results provide further evidence for the structure of theseresonances in terms of an interplay between the inner core of three dressedquarks and an external meson-baryon cloud.

First Results on Nucleon Resonance Electroexcitation Amplitudes from  $ep\to e'\pi^+\pi^-p'$ Cross Sections at $W$ from 1.4-1.7 GeV and $Q^2$ from  2.0-5.0 GeV$^2$