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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">上海光机所利用高性能200TW/1Hz激光驱动产生高质量高稳定性电子 </h1> <p class="xg1"> 时间：2020-7-24 14:48<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(641)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=8582&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a>来自: 上海光机所</p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>中国科学院上海光学精密机械研究所强场激光物理国家重点实验室，对“新一代超强超短激光综合实验装置”中的200TW/1Hz激光进行性能升级，并利用此激光驱动产生了高质量高稳定性电子。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div> 中国科学院上海光学精密<a href="http://machine.oecr.com" target="_blank" class="relatedlink">机械</a>研究所强场<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a><a href="http://theory.oecr.com" target="_blank" class="relatedlink">物理</a>国家重点实验室，对“新一代超强超短激光综合实验装置”中的200TW/1Hz激光进行性能升级，并利用此激光驱动产生了高质量高稳定性<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>。</div><div><br></div><div> 该研究为高峰值功率飞秒激光系统的建设提供了技术指导，为台式化X射线自由电子激光器的实现提供了原理验证。相关成果发表于《光学与激光技术》（OpticsandLaserTechnology）。</div><div><br></div><div> “新一代超强超短激光综合实验装置”激光系统于2015年正式运行，旨在通过激光尾波场加速产生高亮度X射线源。其中，所产生电子的稳定性是装置性能的重要指标。电子的高稳定性将会促进在单能伽马射线源，电子<a href="http://medicine.oecr.com" target="_blank" class="relatedlink">医疗</a>等方面的实际应用。</div><div><br></div><div> 激光尾波场加速是一个高度的非线性过程，所产生电子的性能与驱动激光的参数密切相关。为了获得高质量高稳定的电子，该研究团队对200TW/1Hz驱动激光做了全面升级。</div><div><br></div><div> 在稳定性方面：通过优化放大器的泵浦源和放大模式，放大激光的能量稳定性达到了0.55%(std)；通过优化实验室振动、温度、气流，引入光束自准直技术，激光在靶点的指向稳定性达到了1.5μrad(std)。</div><div><br></div><div> 该指向稳定性(90分钟)是目前所知高峰值功率激光系统最好的<a href="http://opticaltest.oecr.com" target="_blank" class="relatedlink">测量</a>结果。在时空质量方面：通过优化光谱的全局位相，实现了近傅里叶变换极限的脉宽；通过控制系统中光学元件的静态波前畸变，实现了近衍射极限的焦斑。最终，利用f/30离轴抛面镜获得了6.2×1018W/cm2的峰值聚焦强度，是升级前的2.6倍。</div><div><br></div><div> 得益于200TW/1Hz驱动激光的性能提升，该研究团队于2019年获得了高质量高稳定性的电子。在连续300发实验中，电子的重复率达到了100%，电子的平均峰值能量为667MeV，峰值能量抖动为3.4%(std)。该结果是X射线自由电子激光器研究方面的重要突破。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/202007/24/144728c19e32s2rgs7girg.png" target="_blank"><img src="data/attachment/portal/202007/24/144728c19e32s2rgs7girg.png"></a></p></div><div style="text-align: center;"><br></div><div style="text-align: center;"><span style="color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 16px; letter-spacing: 0.544px; background-color: rgb(255, 255, 255);">图1 200TW/1Hz驱动激光升级工程图</span></div><div style="text-align: center;"><span style="color: rgb(51, 51, 51); font-family: -apple-system-font, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif; font-size: 16px; letter-spacing: 0.544px; background-color: rgb(255, 255, 255);"><br></span></div><div style="text-align: center;"><div style="overflow-wrap: normal; color: rgb(143, 143, 143); font-family: Tahoma, "Microsoft Yahei", Simsun; text-align: start; background-color: rgb(255, 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<dd>很好的话题，大家继续呀。</dd> </dl><a name="comment_anchor_27237"></a> <dl id="comment_27237_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(27237, '8582');">引用</a> </span> <a href="http://club.oecr.com/space-uid-17713.html" class="xi2 xw1" c="1">大便</a> <span class="xg1 xw0">2020-7-24 17:48</span> </dt> <dd>求沙发</dd> </dl><a name="comment_anchor_27236"></a> <dl id="comment_27236_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(27236, '8582');">引用</a> </span> <a href="http://club.oecr.com/space-uid-77326.html" class="xi2 xw1" c="1">fangyun</a> <span class="xg1 xw0">2020-7-24 17:18</span> </dt> <dd>大家要多交流哦</dd> </dl><a name="comment_anchor_27233"></a> <dl id="comment_27233_li" class="ptm pbm bbda cl"> <dt class="mbm"> <span class="y xw0 xi2"> <a href="javascript:;" onclick="portal_comment_requote(27233, '8582');">引用</a> </span> <a 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