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为了对放射治疗剂量进行每日监测,这种监测应简便易行,我们设计了一种新型直读式双量程真空室笔形剂量仪,它主要由四部分组成:真空室,验电器型石英丝静电计,磁性充放电开关和读数显微放大镜。当正或负向充电时其量程分别为:0.8Gy或8Gy。即使辐射脉冲剂量率高达10~8Gy/秒,也没有剂量率饱和效应。大剂量持久照射后也不发生“电容器极化效应”和“漏电增强效应”。这种原理的真空室剂量笔特别适用于高强度(如脉冲式)大剂量辐射的监测。
To monitor daily doses of radiation therapy, this monitoring should be easy and simple, and we designed a new direct-reading, dual-range vacuum pen pencil dosimeter that consists of four main components: a vacuum chamber, electroscope-type quartz wire Electrometer, magnetic charge-discharge switch and reading microscope. When the positive or negative charge when the range were: 0.8Gy or 8Gy. Even if the radiation pulse dose rate as high as 10 ~ 8Gy / s, there is no dose rate saturation effect. The “capacitor polarization effect” and the “leakage enhancement effect” do not occur even after a long-term exposure to large doses. This principle of the vacuum chamber pen is particularly suitable for high-intensity (such as pulsed) high-dose radiation monitoring.