Specific Angular Momentum Distribution of Disc Galaxies Formed in Preheated Intergalactic Media

Assuming that baryons within a galactic halo have the same specific angular momentum as the dark matter where they locate initially and a disc forms due to the gas cooling and condensation with the conservation of angular momentum, we investigate the angular momentum distribution in a resulting galactic disc under the new preheated galaxy formation model suggested by Mo and Mao (Mon. Not. R. Astron. Soc. 333 (2002) 768).Compared with the observational results, it can be concluded that the preheated galaxy formation model can match current observations. This model can be a good approach to solve the problems of both the angular momentum catastrophe and the mismatch of angularomomentum profiles in current disc galaxy formation models.     

中国环流器新一号（HL—1M）装置研制

ＨＬ－１Ｍ装置是由ＨＬ－１托卡马克改建成的，从１９９４年１０月起，已成功地投入运行。它们是一个中型圆截面托马克装置，但去掉了铜导体壳，以 便以地等 体进行高功率辅助加热，低杂波电流驱动和弹丸注入等研究。     

93型精密控温煮解电炉介绍

93型精密控温煮解电炉,采用了大型集成化电路设计方法,对化学分析加热控温煮解过程进行数字直观显示。它集于国内外化学分析不同加热煮解类设备功能于一体,填补了化学分析由室温～600℃加热连续自动精密控温煮解技术一项空白。和分析方法密切配合,为实现化学分析质量登上准、稳、快、省全新台阶和分析技术工作效率长足发展提供了一个理想的工具。     

Measurements of Boundary Plasma in Synergy Discharges of IBW and LHCD on the HT-7 Tokamak

By applying ion Bernstein wave (IBW) heating into the lower hybrid current drive (LHCD) plasma, improved confinements have been obtained in the HT-7 tokamak. The central electron temperature was doubled and the storage energy was increased significantly. The core electron density and temperature were broadened and ther profiles near the edge were steepened. A transport barrier has been formed in the vicinity of the limlter radial location. An enhanced shear in poloidal phase velocity was found in the same region with reduction of the fluctuation levels and the coherences between fluctuations. The results suggest that the improved confinement in the IBW and LHCD plasma is at least partially due to the modification of shear in poloidal velocity and then the suppression of fluctuations and fluctuation induced fluxes via de-correlation effect.     

HL—1装置辅助加热等对能量约束的影响

在ＨＬ－１托卡马克上进行了辅助加热，加料，电流驱动的物理实验研究。在改善等离子约束方面，某些实验取得了较好的结果。在适当的稳定放电条件下，低杂波电流驱动和弹丸注入辅助加料，均能使等离子体能量约束得到一定程度的改善，与相同密度条件下的欧姆加热放电相比，能量约束时间提高了约３０％。在电子回旋共振加热等离子体实验中，等离子体总能量明显增加，但与相同密度条件下的欧姆加热放电相比，能量约束时间减少了约２０％     

线圈在磁场中转动的若干计算

2003年全国春季高考和2003年全国理科综合考试都考到了有关线圈在匀强磁场中转动的计算，有必要在今后物理教学和学习中引起重视，现就线圈在磁场中转动的有关计算谈些看法．     

高强度高电导率聚乙炔的合成——醚类溶剂的结构对性能的影响

通过选用不同醚类结构做溶剂加热回流Ti(OBu)_4-AIEt_3催化剂,并采用非溶剂聚合方法进行乙炔聚合发现,所得HPPA膜的强度和电导率都有了较大提高。其中直链醚制得的PA膜强度(抗张强度大于100MPa)和空气稳定性比用环醚得到的PA膜高得多,但用前者时的乙炔聚合速率远低于后者。两体系得到的HPPA膜的碘掺杂电导率值相近(～10~3S/cm),拉伸后可达10~4S/cm量级。SEM、TEM及IR光谱的结果表明,不同醚制得的PA膜的纤维束直径及顺式含量有较大差别。