Development of a stable short-pulse-width flash lamp.

开发稳定的短脉冲宽度闪光灯。

• 批准号: 02640226
• 负责人: SASAO Noboru
• 金额: $ 1.73万
• 依托单位: Kyoto UniVersity
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02640226/
• 关键词: Short-pulse-width Flash Lamp; Xe Flash Lamp; Photomultiplier Gain Monitor; 短パルス幅光源; キセノンフラッシュランプ; フラッシュランプ; 安定光源; 短パルス光

The purpose of this research work is to develop a stable shortpulse flash lamp which can be used to monitor photomultiplier gain variations. We have studied(1)properties of lamp gas, (2)gas pressure, (3)spark high-voltage, (4)spark circuit, (5)electrode structure, etc. In particular, we tested Ar, Xe, H2, N2 gases : Of these, Xe was found to be efficient in producing light although the pulse width of light output was wide. On the other hand, N2 was found to give the narrowest pulse among the studied gases. It was also found that the light yield was larger as the gas pressure and/or the spark voltage was higher. The light pulse width, however, had little dependence on these two parameters. As for the spark circuit, it was important to tune in such a way that it fulfilled the critical damping condition. The anode-cathode gap length was varied ; we chose 0.5, 1.5 and 3.0 mm gap. The minimum spark voltage necessary to fire lamps was found to increase as the gap widened and the light pulse became longer as the gap widened. The light yield efficiency, on the other hand, was little smaller for 0.5mm gap compared with the other two configurations. As a final test, we checked the stability of light output for a lamp of 2 atm. N2 gas with 1.5mm anothercathode gap : the relative stability was found to be 4%(rms).

本研究工作的目的是研制一种稳定的短脉冲闪光灯，用于监测光电倍增管的增益变化。我们研究了(1)灯气的性质，(2)气体压力，(3)火花高压，(4)火花电路，(5)电极结构等。特别地，我们测试了Ar， Xe, H2， N2气体：在这些气体中，虽然光输出的脉冲宽度很宽，但发现Xe能有效地产生光。另一方面，在所研究的气体中，发现N2的脉冲最窄。同时发现，气体压力和/或火花电压越高，光产率越大。而光脉冲宽度与这两个参数的关系不大。至于火花电路，重要的是要以这样一种方式进行调谐，使其满足临界阻尼条件。阳极-阴极间隙长度变化；我们选择了0.5,1.5和3.0毫米的间隙。点燃灯所需的最小火花电压随着间隙的扩大而增加，光脉冲随着间隙的扩大而变长。另一方面，与其他两种配置相比，0.5mm间隙的产光效率略低。作为最后的测试，我们检查了2atm灯的光输出稳定性。另一阴极间隙为1.5mm的氮气：相对稳定性为4%（rms）。