Hard X-ray sources 4 Angular resolution 2 Breakdown property 2 Compact objects 2 Compact structures 2 Discharge chamber 2 Electric discharges 2 Experimental demonstrations 2 Flaring activity 2 Flash hard X-ray source 2 Flash radiography 2 Gamma rays 2 Hard X-ray spectrum 2 Hard x-ray emission 2 Hard x-ray imaging 2 Numerical calculation 2 Plasma Focus 2 Plasma devices 2 Plasma focus hard X-rays 2 Plasma hard X-ray sources 2 Radiation 2 Radio astronomy 2 Radio sources 2 Radiographic method 2 Single shot HXR spectral analysis 2 Single-shot images 2 Supernova remnants 2 Time-scales 2 X ray analysis 2 X ray radiography 2