会议论文详细信息
9th International Conference on Inertial Fusion Sciences and Applications
Short-pulse, compressed ion beams at the Neutralized Drift Compression Experiment
Seidl, P.A.^1 ; Barnard, J.J.^2 ; Davidson, R.C.^3 ; Friedman, A.^2 ; Gilson, E.P.^3 ; Grote, D.^2 ; Ji, Q.^1 ; Kaganovich, I.D.^3 ; Persaud, A.^1 ; Waldron, W.L.^1 ; Schenkel, T.^1
Lawrence Berkeley National Laboratory, Berkeley
CA, United States^1
Lawrence Livermore National Laboratory, Livermore
CA, United States^2
Princeton Plasma Physics Laboratory, Princeton
NJ, United States^3
关键词: Inertial fusion energy;    Lawrence Berkeley National Laboratory;    Multi-scale dynamics;    Neutralized drift compressions;    Pump-probe experiments;    Radiation induced damage;    Short focal lengths;    Short pulse duration;   
Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012079/pdf
DOI  :  10.1088/1742-6596/717/1/012079
来源: IOP
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【 摘 要 】

We have commenced experiments with intense short pulses of ion beams on the Neutralized Drift Compression Experiment (NDCX-II) at Lawrence Berkeley National Laboratory, with 1-mm beam spot size within 2.5 ns full-width at half maximum. The ion kinetic energy is 1.2 MeV. To enable the short pulse duration and mm-scale focal spot radius, the beam is neutralized in a 1.5-meter-long drift compression section following the last accelerator cell. A short-focal-length solenoid focuses the beam in the presence of the volumetric plasma that is near the target. In the accelerator, the line-charge density increases due to the velocity ramp imparted on the beam bunch. The scientific topics to be explored are warm dense matter, the dynamics of radiation damage in materials, and intense beam and beam-plasma physics including select topics of relevance to the development of heavy-ion drivers for inertial fusion energy. Below the transition to melting, the short beam pulses offer an opportunity to study the multi-scale dynamics of radiation-induced damage in materials with pump-probe experiments, and to stabilize novel metastable phases of materials when short-pulse heating is followed by rapid quenching. First experiments used a lithium ion source; a new plasma-based helium ion source shows much greater charge delivered to the target.

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