为兰州第二条放射性束流线（RIBLL2）研制了一台用于ΔE测量的纵向场多次取样型电离室。利用3组分α源（239Pu为3.435MeV,241 Am为3.913MeV,244Cm为4.356MeV）对取样单元进行了测试,确定了电离室的最佳工作电压为-500V,沉积能量为3.435MeV时,取样单元的能量分辨为271.4keV（FWHM）。利用Geant4对此电离室的整体性能进行了模拟,表明可以对Z≥4的离子实现较好的粒子鉴别。
A longitudinal field MUltiple Sampling Ionization Chamber（MUSIC）,which makes multiple measurements of energy loss for very high energy heavy ions at RIBLL2,has been constructed and tested with 3 constituent α source（239Pu： 3.435 MeV,241Am： 3.913 MeV,244Cm： 4.356 MeV）.The voltage plateau curve has been plotted and-500 V is determined as a proper work voltage.The energy resolution is 271.4 keV FWHM for the sampling unit when 3.435 MeV energy deposited.A Geant4 Monte Carlo simulation is made and it indicates the detector can provide unique particle identification for ions Z≥4.
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