低温高背压氘团簇源特性研究

为了产生大尺度氘团簇用于与强激光相互作用研究，研制了低温高背压团簇源.利用瑞利散射法对团簇尺度与气体背压相关性和团簇的形成演变过程进行了研究.得到团簇尺度N_c随背压的指数变化关系为N_c∝P^2.89₀，当气体温度为80K，背压P₀为48×10⁵Pa时，氘团簇尺度N_c≈2630，并得到了团关键词：氘团簇团簇源瑞利散射激光与团簇相互作用

Characterization of a cryogenically cooled high-pressure gas jet

We have developed and carried out a detailed characterization of a cryogenically cooled (80K) high-pressure (50×10⁵Pa) solenoid driven pulsed valve that has been used to produce dense jets of deuterium atomic clusters for interaction studies with high intensity laser. Rayleigh scattering was employed to investigate the scaling law between cluster size and upstream gas pressure，which was shown to be of the form N_c∝P^2.89₀. Cluster size gets to its peak N_c≈2630 at 80K，48×10⁵Pa. We also studied the cluster formation process，portrayed a characteristic curve which revealed cluster size temporal evolution. Our results are important for analyzing the cluster interaction with intense laser， and are expected to provide guidelines to choose proper fire time.