玩高压的朋友们注意了，当心电离辐射


今天做了一个实验验证了我以前的怀疑，高压加速的高速电子打到阴极会激发电离辐


射，即使在空气中。
所以TC等瞬间放电的场合会激发电离辐射，猜测应该是X射线。
实验内容：
利用手持打火器，以1次/秒的速度产生放电脉冲，附近的盖氏计数器有了明显的反应


。测试环境的背景噪音为0.08uS/h, 使用打火器以后，测得的辐射高达0.56+0.08uS/h


，是原来的8倍。
这里提醒高压发烧友们关注此现象，注意健康。想想小时候玩打火器的时候没有任何


防护真有点后怕。


视频见：
v-youku-com/v_show/id_XXXXXXXXXXXXXXXXml
(把‘-‘ 换成’.‘)





最新更新：
又做了几个实验，
第一个实验：用铝箔将打火器放电头裹住，
1.铝箔不解地，电磁干扰依然存在，计数器仍然有反应
2.铝箔接地，电磁干扰几乎消除，计数器没有明显反应
这说明及有可能是电磁干扰导致的计数器反应，但不排除高能粒子被铝箔挡住。
第二个实验：
将手机从UMTS模式切换到GSM模式放在计数器附近，
当手机发射信号的时候，计数器受到强烈干扰接近而饱和。
当手机处于UMTS模式时，计数器不受干扰。


结论：
计数器会受到电磁干扰而产生错误的数据。
计数器对于脉冲式的电磁干扰尤为敏感（例如GSM信号），而对连续电磁波敏感度小（例如CDMA信号）。
高压脉冲放电产生电磁干扰，可能是导致计数器误读的原因；即使放电产生了高能粒子，也无法穿透接地的铝箔。
关于放电器附近荧光粉的闪烁，可能是电弧中的紫外线所致。


查阅了一些资料，有两点值得注意：
如果高电压接到了真空器件里的电极上（如老式的灯泡），会产生X射线。
高压放电产生的电弧富含紫外线（如同氩弧焊的电弧），肉眼对紫外线无痛感，但事后会损伤视网膜，观测的时候要注意防护。
另外要注意疏通高压放电产生的臭氧，防止损害人体。


附：
Ultraviolet Light and X-ray Production


Ultraviolet light may be produced by the spark gap during operation of a tesla coil. The human eye has no pain sensors within it, so the bioeffects are felt later, when it is too late. (Ever look at the sun for a while, or watch a welder at work?) The light produced in a spark gap is essentially identical to that produced by an arc welder, containing substantial amounts of hard ultraviolet light. As any professional arc welder will tell you "Don't Look At The Arc!" Spark gaps produce a large amount of UV and visible light. The visible light is extremely bright, and the ultraviolet light will damage your eyes, and can cause skin cancer. The arc is so bright that you couldn't make out any detail anyway, so why bother? If you must study your spark gap, use welder's glasses. Generally, it is not too difficult to rig up a piece of plastic, cardboard, etc. that will shield yourself and others.


X-rays


X-rays can be produced whenever there is a high voltage present. Although a number of coilers have tested their coils for x-ray radiation and found none present that is not to say that x-rays cannot be produced, especially if vacuum tubes, light bulbs, and other evacuated vessels are placed near a coil. Here is a little information about X-rays.