STJ X-ray谱仪（超导隧道结X射线谱仪�?参数-价格-中国粉体罐�/title>

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$(this).css({"color":"#1479d7","border-bottom-color":"#1479d7"}); }); }); </script>  <div class="cpjj"> <p><span>STJ X-ray</span><span>是专用于�?/span><span>X</span><span>射线束探测的无液氦超导隧道结</span><span>X</span><span>射线谱仪，具有高能量分辨和高计数率等优点、�/span></p><p></p><p><span><p><span>STJ X-ray<span>射线谱仪</span></p></span><p><strong><span>概述９�/span></strong><strong></strong></p><p><span>超导隧道结（</span><span>STJ</span><span>（�/span><span>X-</span><span>射线谱仪由美囼�/span><span>STAR Cryoelectronics </span><span>公司专门为同步辐射研究领域开发的一款高性能低温探测系统。优化设计的</span><span>STJ</span><span>探测器既适合作为紫外</span><span>-</span><span>�?/span><span>X</span><span>射线波段范围＇�/span><span>50eV-3keV</span><span>）荧光产率吸收谱＇�/span><span>PFY-XAS</span><span>）用探测器，也适合作为同步辐射装置的高光子通量探测器。在</span><span>525eV</span><span>处的能量分辨率（峰半高宽）优亍�/span><span>10eV</span><span>，每像素每秒计数超过</span><span>1</span><span>万次、�/span><span>STJ</span><span>探测器比传统固态探测器（例妁�/span><span>HPGe</span><span>）和硅漂移探测器的分辨率髗�/span><span>10</span><span>倍，并保持高量子效率和高计数率的特点，与其它低温探测器相比，</span><span>STJ</span><span>探测器使用更简单也更稳定，非常适合作为高光子通量同步加速器装置皃�/span><span>X</span><span>射线探测器来使用、�/span></p><p><strong><span>性能参数</span></strong><strong></strong></p><p><span>不�/span><span>传统固态探测器相比＋�/span><span>STJ</span><span>探测器能量分辨率优于</span><span>10eV</span><span><span>＋�/span>能够分辨出大多数传统固体探测器无法辨识的近邻峰。利�?/span><span>STJ</span><span>探测器可清晰地分辨出</span><span>Mn</span><span>咋�/span><span>Fe </span><span>皃�/span><span>L</span><span>峰位亍�/span><span>F</span><span>皃�/span><span>k</span><span>峰（</span><span>677eV</span><span>）的两侧，能够将不同元素的荧光产率吸收谱从弱背景中提取出来、�/span><span>STJ</span><span>探测器也可将</span><span>V</span><span>�?/span><span>Cr</span><span>�?/span><span>Ti</span><span>皃�/span><span> L</span><span>峰从</span><span>O</span><span>皃�/span><span>K</span><span>峰位分辨出来＋�/span><span>W</span><span>咋�/span><span>Ta</span><span>皃�/span><span>M</span><span>峰从</span><span>Si</span><span>皃�/span><span>K</span><span>峰位中分辨出来、�/span></p><p><span>在每像素每秒计数率在</span><span>2�?00</span><span>次以内时＋�/span><span>STJ</span><span>保持高能量分辨率地特点，即使计数率超迆�/span><span>10�?00</span><span>次，</span><span>STJ</span><span>的能量分辨率仍保持在</span><span>20eV</span><span>左右、�/span></p><p></p><p><span>通过</span><span>32-Pixel STJ</span><span>探测器采集的多元素样品的单像素谱</span></p><p><span> 集成</span><span>STJ</span><span>探测器的</span><span>DRC-100 ADR</span><span>恒温器全部操作由计算机程控。与其它类型低温探测器不同，</span><span>STJ</span><span>探测器的工作温度只需要低亍�/span><span>250mK</span><span>阀值温度即可。带微型</span><span>snout</span><span>皃�/span><span>ADR</span><span>恒温器在</span><span>200mK</span><span>的工作温度下可保�?/span><span>60</span><span>小时，再生循环过程仅需</span><span>1.5</span><span>小时。三层红外滤光片能够消除室温辐射芯片，且</span><span>1keV</span><span>以上</span><span>X</span><span>射线透射率超迆�/span><span>90%</span><span>。也可根据需求提供允许低能射线通过滤光片，不过</span><span>ADR</span><span>恒温器的低温保持时间将会缩短、�/span></p><p></p><p><span><span>通过标准三层</span><span>IR</span><span>红外滤光片的</span><span>X</span><span>射线透过率与能量关系</span></span></p><p><strong><span>配置</span></strong><strong></strong></p><p><span> 根据实验的不同，提供标准型和微型两种</span><span>STJ X-ray</span><span>探测器系统。标准型</span><span>STJ X-ray</span><span>探测器系统带一�?/span><span>42cm</span><span>镾�/span><span>72mm</span><span>粗的冷指，冷指末端端面上安装一�?/span><span>112</span><span>像素芯片，冷指可伸入分析室使得探测器距离样品仄�/span><span>1cm</span><span>，每个像素的有效探测面积丹�/span><span>0.2mm*0.2mm</span><span>，总有效探测元面积丹�/span><span>4.48mm</span><sup>2</sup></span><span>、�/span></p><p></p><p><span><span><p><span>标准垊�/span><span>STJ X-ray</span><span>探测器恒温器</span></p><p><span>（带</span><span>112</span><span>个探测器阵列，总有效探测元面积丹�/span><span>4.48</span><span>mm<sup>2</sup></span><span>（�/span></p><span><p><span>微型</span><span>STJ X-ray</span><span>系统是针对空间受限的实验设计，提侚�/span><span>32mm</span><span>粗的</span><span>snout</span><span>�?/span><span>32</span><span>个探测器阵列和一个标凅�/span><span>2.75“�/span><span>刀口法兰、�/span></p><p><span>这两秌�/span><span>STJ X-ray</span><span>恒温器系统带标准</span><span>6“�/span><span>或耄�/span><span>2.75“�/span><span>刀口法兰，与用户实验腔公用同一真空，故无需提供</span><span>X</span><span>射线真空密封窗口。探测器安装在行程为</span><span>32cm</span><span>的线性滑轨上，允许探测器从样品腔撤出并通过插板阀隔离、�/span><span>法兰中心到下面线性滑轨底部距离有</span><span>33cm</span><span>的标准高度和</span><span>22.6cm</span><span>较矮型两种、�/span></p></span></span></span><p><span><span><span><p></p><p><span><p><span><span> 微型</span><span>STJ X-ray</span><span>探测器恒温器</span></span></p></span></p></span></span></span></p></p></p> </div>  <div class="cxd"> <div class="cxd_tit"><span></span>创新炸�/div> <p style=" color: #333; 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