Neutron Spin Echo Studies on Correlation between Membrane Undulations and Mesoscopic Structures in Complex Fluids Involving Amphiphiles

我们利用这笔赠款改进了我们的中子自旋回波谱仪(ISSP-NSE)。偏光镜和分析器的偏光镜被替换为与柏林HMI合作获得的FeCo/Si超级镜。新的偏振器和分析仪的总偏振度都在90%以上。在使用这笔赠款检查了瑞士中立子公司提供的FeCo/TiNx剩余偏振超级反射镜之后，ISSP购买了一个6m弯曲器导偏器和一个由瑞士中性子公司提供的剩余偏振超反射镜组成的宽截面多通道弯曲导偏器分析器，并利用这笔赠款开发了大截面螺旋校正线圈，以升级ISSP-NSE。我们在J-PARC的脉冲散裂中子源(JSNS)上研制了用于飞行时间NSE谱仪的新型自旋翻转器，它以稳定的电流工作在白色中子束上。为了研究dipalmitoylphosphatidylcholine(DPPC)/water/CaCl_2体系、非离子表面活性剂C&lt；12&gt；E_5/油/水体系和离子表面活性剂AoT/油/水体系等两亲性复合流体的膜波动、介观结构、温度和压力诱导的结构相变等动力学行为，进行了NSE和小角散射实验。

We have improved our neutron spin echo (NSE) spectrometer (ISSP-NSE) using this grant. The polarizing mirrors for the polarizer and the analyzer were replaced with FeCo/Si supermirrors obtained by collaboration with HMI Berlin. A total polarization of the new set of the polarizer and the analyzer was over 90%. After examination of polarizing supermirrors such as FeCo/TiNx remanent one obtained from SwissNeutronics using this grant, a 6 m bender guide polarizer and a wide cross section multi-channel bender guide analyzer which consisted of remanent polarizing supermirrors provided from SwissNeutronics were purchased by ISSP and wide cross section spiral correction coils were developed using this grant in order to upgrade ISSP-NSE. We have developed the new-type spin flippers, which operate with steady current for a white neutron beam, for a time-of-flight NSE spectrometer at a pulsed spallation neutron source (JSNS) in J-PARC. NSE and small angle scattering experiments have been performed in order to study dynamics such as membrane undulation, mesoscopic structures and the temperature- and the pressure-induced structural phase transition in complex fluids involving amphiphiles such as dipalmitoylphosphatidylcholine(DPPC)/water/CaCl_2 systems, the non-ionic surfactant C_<12>E_5/ oil/water systems and ionic surfactant AOT/oil/water systems.