V2质子静电加速器的改进与现状

Improvements and Status of the Proton Electrostatic Accelerator, V2

V2质子静电加速器（简称V2）在1958年建成，已运行40年．现在最高运行能量为2．4MeV；质子束流强度为微安量级（0．6—2．5μA）．磁分析器磁铁励磁电流电源稳定度为±0.01％，加速器能量分辨率可达1‰．改变了输电带的分压装置，使更换输电带更为方便．添加了三岔管道，增加了外束．从70年代以来，V2主要用于核分析工作．最近开展了用离子感生发光法对外长石中铁的不同化学价态Fe2＋和Fe3＋进行了分析，Fe2＋和Fe3＋光谱峰分离，清晰可辨．

The proton electrostatic accelerator, V2 completed in 1958 has been operated for 40 years. At present, the highest energy is 2.4 MeV. The intensity of the proton beam is 0.6-2.5μA. The stability of the power suPPly for the magnetic analyzer is ±0.01%. The energy resolution of the proton beam is 0.1%. The arrangement of the equipotential rod along the charging belt was changed from the original design, the dismantiling and installing of the belt takes much less bine and labor. A three. forked vacuum pipe was installed, which can be used to extract external proton beams. ms accelerator is mainly used for nuclear analysis since the seventies. Recently the ionoluminescence (IL) method was used to study the chemical states of iron in a plagioclase sample with the external proton beam, both ferrous and ferric iron peaks (Fe2+, Fe3+) from the plagioclase sample were detected in the IL emission spectrum.