# HI Jena

 2019-11-2211:04 [GSI-2019-01134] Journal Article et al How to Observe the Vacuum Decay in Low-Energy Heavy-Ion Collisions Physical review letters 123(11), 113401 (2019) [10.1103/PhysRevLett.123.113401] 2019-11-2211:01 [GSI-2019-01133] Journal Article et al Tunable dual-comb from an all-polarization-maintaining single-cavity dual-color Yb:fiber laser Optics express 27(20), 28062 (2019) [10.1364/OE.27.028062] OpenAccess: PDF; 2019-11-2210:55 [GSI-2019-01131] Journal Article et al New test of modulated electron capture decay of hydrogen-like $^{142}$Pm ions: Precision measurement of purely exponential decay Physics letters / B B 797, 134800 (2019) [10.1016/j.physletb.2019.134800] An experiment addressing electron capture (EC) decay of hydrogen-like ions has been conducted at the experimental storage ring (ESR) at GSI. The decay appears to be purely exponential and no modulations were observed. [...] OpenAccess: PDF; 2019-11-0408:31 [GSI-2019-01051] Journal Article et al Single-pass non-destructive electronic detection of charged particles Review of scientific instruments 90(11), 113301 (2019) [10.1063/1.5110988] We have devised an experimental method and apparatus for the simultaneous nondestructive determination of the absolute ion number, ionkinetic energy, and length of bunches of charged particles. We have built and operated a corresponding electronic detector that is based oninduced charges and their subsequent low-noise amplification at cryogenic temperatures. [...] OpenAccess: PDF; 2019-10-2415:03 [GSI-2019-01027] Journal Article et al A study on the effects and visibility of low-order aberrations on laser beams with orbital angular momentum Applied physics / B 125(11), 202 (2019) [10.1007/s00340-019-7317-6] Laguerre-Gaussian-like laser beams have been proposed for driving experiments with high-intensity lasers. They carry orbital angular momentum and exhibit a ring-shaped intensity distribution in the far field which make them particularly attractive for various applications. [...] OpenAccess: PDF; 2019-10-1813:30 [GSI-2019-01001] Journal Article Bagnoud, V. Picosecond contrast degradation by surface imperfections in chirped-pulse-amplification stretchers In this paper, we propose a study of the picosecond temporal contrast degradation of ultrashort laser pulses by surface defects in pulse stretchers. In a chirped-pulse-amplification stretcher or compressor, dust and damages on the surface of an optical element lead to a spectral amplitude modulation [...] 2019-09-2615:06 [GSI-2019-00948] Contribution to a conference proceedings/Contribution to a book et al Diode-pumped cryogenic Tm:LiYF$_4$ laser High-Power, High-Energy, and High-Intensity Laser Technology IV : [Proceedings] - ISBN 9781510627321 9781510627338SPIE Optics + Optoelectronics, PraguePrague, Czech Republic, 1 Apr 2019 - 4 Apr 2019 SPIE 1 - 6 (2019) [10.1117/12.2517734] 2019-09-2614:52 [GSI-2019-00947] Contribution to a conference proceedings/Contribution to a book et al Highly efficient, cryogenically cooled Yb:YAG q-switch laser based on a gain modulated unstable resonator design High-Power, High-Energy, and High-Intensity Laser Technology IV - ISBN 9781510627321 9781510627338SPIE Optics + Optoelectronics, SPIE, PraguePrague, Czech Republic, 1 Apr 2019 - 4 Apr 2019 1 - 6 (2019) [10.1117/12.2522118] 2019-09-2614:49 [GSI-2019-00946] Journal Article et al Petawatt and exawatt class lasers worldwide OpenAccess: PDF; 2019-09-2614:42 [GSI-2019-00945] Journal Article et al Ab initio QED Treatment of the Two-Photon Annihilation of Positrons with Bound Electrons Physical review letters 123(9), 093401 (2019) [10.1103/PhysRevLett.123.093401]