info:eu-repo/semantics/article
Efficient picosecond x-ray pulse generation from plasmas in the radiation dominated regime
Fecha
2017-10Registro en:
Hollinger, Reed; Bargsten, Clayton; Shlyaptsev, Vyacheslav N.; Kaymak, Vural; Pukhov, Alexander; et al.; Efficient picosecond x-ray pulse generation from plasmas in the radiation dominated regime; Optical Society of America; Optica; 4; 11; 10-2017; 1-6
2334-2536
CONICET Digital
CONICET
Autor
Hollinger, Reed
Bargsten, Clayton
Shlyaptsev, Vyacheslav N.
Kaymak, Vural
Pukhov, Alexander
Capeluto, Maria Gabriela
Wang, Shoujun
Rockwood, Alex
Wang, Yong Xiang
Townsend, Amanda
Prieto, Amy
Stockton, Patrick
Curtis, Alden
Rocca, Jorge J.
Resumen
The efficient conversion of optical laser light into bright ultrafast x-ray pulses in laser created plasmas is of high interest for dense plasma physics studies, material science, and other fields. However, the rapid hydrodynamic expansion that cools hot plasmas has limited the x-ray conversion efficiency (CE) to 1% or less. Here we demonstrate more than one order of magnitude increase in picosecond x-ray CE by tailoring near solid density plasmas to achieve a large radiative to hydrodynamic energy loss rate ratio, leading into a radiation loss dominated plasma regime. A record 20% CE into ℎ>1 keVhν>1 keV photons was measured in arrays of large aspect ratio Au nanowires heated to keV temperatures with ultrahigh contrast femtosecond laser pulses of relativistic intensity. The potential of these bright ultrafast x-ray point sources for table-top imaging is illustrated with single shot flash radiographs obtained using low laser pulse energy. These results will enable the deployment of brighter laser driven x-ray sources at both compact and large laser facilities.