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２７０°偏转磁铁系统是 １４ ＭｅＶ医用电子驻波直线加速器上的关键部件。通过用 ＴＲＡＮＳＰＯＲＴ—ＥＭ／ＰＣ程序和ＰＯＩＳＳＯＮ程序计算，完成了偏转磁铁样机设计方案。２７０°偏转 磁铁样机与加速管联合进行了出束试验，测试结果表明，具有 ６～１４ ＭｅＶ能量范围、不同的初 始发射度的电子束流，通过２７０°偏转磁铁系统受到消色散和聚焦作用，传输到靶点在能量１５．１ ＭｅＶ时，束流强度为３．５ｍＡ，束流斑点直径约为２ｍｍ。上述结果证明２７０°偏转磁铁系统性能完 全满足 １４ ＭｅＶ医用直线加速器放射治疗条件要求。
The 270 ° deflection magnet system is a key component of the 14 MeV medical electron standing wave linear accelerator. By using the TRANSPORT-EM / PC program and the POISSON program, the design of the deflection magnet prototype was completed. The beam deflection test was carried out with a 270 ° deflection magnet prototype and an accelerating tube. The test results show that electron beams with different initial emittance in the energy range of 6-14 MeV are subjected to the decoloring and focusing effect by the 270 ° deflection magnet system, The beam delivered to the target at a energy of 15.1 MeV had a beam intensity of 3.5 mA and a beam spot diameter of about 2 mm. The above results demonstrate that the performance of the 270 ° deflection magnet system fully meets the radiotherapy conditions for 14 MeV medical linear accelerators.