Research On The Time-space Resolution Diagnosis Technology Of Soft X-ray Radiation Based On Scintillator Conversion

The Z-pinch imploding plasma is one of the effective methods to produce intense soft X-ray sources,and it plays an important role in inertia confined fusion,radiation effect and radiation transport.Acquiring the characteristic parameters of the energy,spectrum and the spatial-temporal property is important to understand the imploding process of the Z-pinch plasma.How to acquire the spatial distribution and evolution history of X-ray flux and radiation waves is a difficult point in the diagnostic technology of intense soft x-ray.In order to meet the requirements of the Z-pinch experiments on PTS and the relevant diagnostics,this paper study the x-ray radiation diagnosis with a spatial and temporal resolution basing on the conversion of scintillator foil,and develop a temporal and one dimension spatial resolved X-ray imaging system which enriches the intense soft x-ray diagnoses on PTS.The contents and main conclusions of this thesis are introduced below:1.This paper proposed a temporal and one dimension spatial resolved X-ray diagnosing method and completed the design of diagnostic system.Basing on the properties of the intense soft x-ray source and the analyzing of relevant diagnostics,this paper designed a temporally and one-dimension spatially resolved X-ray imaging system which involves scintillator foil,fiber bind and the optical streak camera,the relevant optical parts and instruments.2.This paper studies time responses of plastic scintillator foil.Using on the pulsed X-ray source(～100ps)produced by X-pinch,we demarcated the x-ray responding properties of plastic scintillator foil,which decides the temporal resolution of the diagnosing system.The results indicated that the rising time of the x-ray responding curve is about 100ps,the flaring time of the scintillator foil is larger than 1.5ns,and its temporal resolution is less than 1.Ons.3.The synchronous triggering system was established.By analyzing all kinds of measuring signals in the experiments on PTS facility,we established a synchronous triggering system where the laser signal from the laser switch were transformed,reformed,delayed and at last to be as the triggering signals of this diagnosing system.The analysis of the experimental data indicates that,the vibrating time between the working time of diagnosing system and the occurring time of the object x-ray source is about 1.9ns.By introducing a cursor,we established the temporal relevance between the x-ray streaking picture captured by this system and the X-ray signal captured by XRD.We also analyzed the precision of the temporal correlation which was thought to be less than 90ps.4.This diagnosing system was tested in the experiments on PTS in order learn to review its capability.In the k-shell experiments where aluminum wire-array was used and the Z-pinch dynamic hohlraum experiments,a temporal and axial spatial resolved X-ray picture of this system was captured which could give an X-ray emission distribution in the axial direction and its evolution history.In conclusion,the temporal and 1-d spatial resolved X-ray diagnosing system for the Z-pinch experiments on PTS introduced in this paper was well tested.The quality and precision of the acquired data met the requirements of the experiment.This system provided the effective picture data to study the dynamics of the imploding plasma and the radiation properties of the X-ray.