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光阴极注入器型能量回收射频加速器(PERL)是新一代加速器,在高平均功率自由电子激光和下一代高亮度光源等研究中有很好的应用前景。分析了PERL的强流与高平均功率特性,对注入器输出束流品质的要求及光阴极注入器、超导加速腔等关键技术进行了研究,设计分析了一种特殊结构的高压DC Gun光阴极注入器,能有效地提高DC加速腔中的加速场强,当高压为1MV和加速场达到10MV/m时,产生的电子束流能够基本满足PERL应用要求。同一超导加速段中的束流加速和能量回收的数值模拟计算结果表明,能获得高效率电子束流能量回收效果。 相似文献
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光阴极注入器型能量回收射频加速器(PERL)是新一代加速器,在高平均功率自由电子激光和下一代高亮度光源等研究中有很好的应用前景。分析了PERL的强流与高平均功率特性,对注入器输出束流品质的要求及光阴极注入器、超导加速腔等关键技术进行了研究,设计分析了一种特殊结构的高压DC Gun光阴极注入器,能有效地提高DC加速腔中的加速场强,当高压为1MV和加速场达到10MV/m时,产生的电子束流能够基本满足PERL应用要求。同一超导加速段中的束流加速和能量回收的数值模拟计算结果表明,能获得高效率电子束流能量回收效果。 相似文献
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设计了750 keV,201.25 MHz的RFQ注入器的射频结构,对四杆型RFQ结构进行了简要的理论分析,在束流动力学设计的基础上,对射频结构进行了优化。研究了四杆型RFQ结构中支撑板高度、宽度、厚度、间距、形状、外腔体半径等因素对射频特性的影响,进行了优化设计并给出了主要的结构参数及射频特性的设计结果。优化设计得到的四杆型RFQ腔体长度126 cm,在极间电压80 kV时,峰值功率损耗为115.95 kW,二极场因子为1.004,电场沿轴向分布比较均匀,偏差小于3.5%,满足了物理需求。 相似文献
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由于实验高能物理对于高能加速器的需要,希望建造能量为Tev数量级的电子、正电子直线对撞机,为此需要建造能量为Tev数量级、加速梯度为100MV/m的电子直线加速器。本文对于这种高梯度电子直线加速器的工作频率和加速结构的选取、新的微波功率源、脉冲功率压缩系统和双束加速器等有关问题作了综合性的介绍。 相似文献
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二极管激光侧泵浦单横模100Hz电光调Q激光器 总被引:3,自引:0,他引:3
介绍了二极管激光侧泵浦单横模100Hz电光调Q激光器的实验结果。泵浦源为一个线阵准连续100W二极管激光器,激光工作介质为NdYAG薄梯形板条,板条与泵浦源间用柱透镜耦合,KD*P电光晶体调Q。在100Hz重复频率下,获得单脉冲能量2.37mJ,脉宽小于7ns,光束质量因子M2=1.1的1.06μm激光,光-光效率为8.5%,斜效率为18.7%。 相似文献
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H. Y. Shen R. F. Wu Z. D. Zeng W. X. Lin R. R. Zeng Y. P. Zhou G. F. Yu C. H. Huang 《中国光学快报(英文版)》2000,9(2)
A laser diode (LD) pumping high-stability 1047 nm TEM00 mode Nd: YLiF4 (Nd: YLF) continuous wave (CW) laser is reported in this letter. The laser output power of 5.83 W with optical to optical effidency of 27% and slope efficiency of 30% has been achieved The instability of output power is 0.36% and spike caused by relaxation oscillation has not been observed in the laser beam. The transverse cross section of laser beam is an ellipse, the diameters of laser beam at output mirror in both directions are 0.97 mm and 1.07 mm, respectively. The divergent angles are 0. 936 mrad and 0. 774 mrad, and the values of M2 are 1.37 and 1.24, respectively. The polarization degree of laser beam is better than 237:1. 相似文献
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33 W quasi-continuous-wave narrow-band sodium D_(2a) laser by sum-frequency generation in LBO 下载免费PDF全文
We demonstrate an all-solid quasi-continuous-wave (QCW) narrow-band source tunable to sodium D2a line at 589.159 nm. The source is based on sum-frequency mixing between lasers at 1064 nm and 1319 nm in a LBO crystal. The 1064 nm and 1319 nm lasers are produced from two diode side-pumped Nd:YAG master oscillator power amplifier (MOPA) laser systems, respectively. A 33 W output of 589 nm laser is obtained with beam quality factor M^2 = 1.25, frequency stability better than ±0.2 GHz and linewidth less than 0.44 GHz. A prototype 589 nm laser system is assembled, and a sodium laser guided star has been successfully observed in the field test. 相似文献
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The efficient cw mode locking (cw-ML) regime was demonstrated in Nd:YVO4 laser by means of saturable absorber mirror (SAM). The 0.3-at.% Nd3+ doped 10-mm-long YVO4 crystal end pumped by 20-W diode module with a beam shaper was applied as a gain medium located in the close vicinity to
the rear flat mirror of the first arm of Z-type resonator of 316 cm total length with two curved mirrors of 100-cm curvature
radii. The SAM of 2%-saturable absorptance and saturation fluence of 50 μJ/cm2 was mounted at the opposite end of a resonator. The developed “dynamically stable” cavity design mitigates detrimental role
of thermal aberration in gain medium, enforcing clean perfect mode locking even for the highest pump densities. The cw-ML
pulses with 47.5 MHz repetition rate and pulse durations in the range of 15–20 ps were observed for a wide range of pump powers
and output coupler losses. In the best case, for 32% of output coupler transmission, up to 6.2 W of average power with near
35% slope efficiency was achieved. The thresholds for Q-switched ML, cw-ML regimes were 2.67 W and 6.13 W of pump power, respectively.
For the maximum pump power of 20 W we obtained 133 nJ of pulse energy with 16-ps pulse duration, resulting in a peak power
higher than 8 kW. The threshold energy density at SAM giving the QML regime was estimated to be about 30 μJ/cm2, threshold of cw-ML regime was 220 μJ/cm2. 相似文献
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报道了单模、单频连续1.3188μmNd:YAG激光器的研制,测量了激光输出的方向性,稳定性,激光光谱及输出功率,对实验结果进行了理论分析。 相似文献
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本文讨论了连续波环形染料激光器的单向运转特性。采用改进的Ganiel速率方程模型,分析了在单向运转条件下泵浦光通量、染料分子密度等参量对激光光通量、激发单重态粒子集居数密度以及增益的影响;揭示了在连续波环形染料激光器中单向运转条件下存在粒子集居数密度的非对称性、激光光通量与激活介质内空间位置的相关性和增益峰值波长的扫描现象。本文给出了数值计算结果。 相似文献