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内容:在完成大气
探测
这一基本功能的基础上,项目还将开展卫星编队飞行、太阳帆推进、太空垃圾清除、航天器再入返回等多项创新型研究。,我校参与QB50项目的“紫丁香一号”小卫星重约两公斤,将携带中性粒子质谱仪、业余无线电转发器与CMOS相机发射升空,实现低热层大气
探测
、无线电中继通信及空间摄影功能,在轨寿命约三个月。
基于NaI(Tl)与滨松R9420pmt的伽马能谱仪试制
GiroPetrenko
4年3个月前
回复于
核技术与核仪器
内容:触发中断,adc采样+复位,这样子对于时效要求低,也不需要峰值甄别的程序了.在此感谢lzd1996大佬做的仿真+电路修改绿色为输入脉冲,顶端1uS,上升沿100nS,下降沿200nS,基本符合NaI闪烁体
探测
器特征
射线对CMOS成像元件的影响/简易辐射探测
北落师门
8年8个月前
回复于
核技术与核仪器
内容:引用 老鼠先生:诶,这是一个好办法,感觉和光电倍增管
探测
辐射的原理类似。
能力考验之改错题测试:使用液态氢是美国人登月造假的证据
QQQQQQQ
10年2个月前
回复于
喷气推进
内容:怀疑是每个人的权利,不喜勿喷,我也怀疑美国发射的是返回式
探测
器,预先录好的节目播放,液氢尽管质量比冲大,产物气体摩尔质量小,但因为密度小和摩尔燃烧热不具明显优势,质疑是有道理,但是 We need more
手机外接玩具手柄
玄明
12年11个月前
发表于
极客DIY
内容:实际上,通过安装使用该配件及相关的应用软件,该手柄的内置相机将可以
探测
到其他用户的手机,并将它们的位置及行动等显示在手机屏幕上。
夏普205sh手机核辐射探头的拆解及整机拆解图展示【部分图源网络】
氦
3年0个月前
回复于
拆机鉴赏
核技术与核仪器
内容:半导体辐射
探测
元件输出信号太微弱了,容易被干扰太正常了。
『原创』汽车行车雷达设想(非倒车雷达)
大傻
16年4个月前
回复于
极客DIY
内容:这个好办,我在船厂做过,船上用的是返回式声纳,装在船底,用过
探测
要经过的河床的航道情况。
美科学家发现月球北极含有6亿吨水冰(图)
拔刀斋
14年11个月前
回复于
极客DIY
内容:航天器有很厚的保温层,环境冷了无所谓,热了才麻烦(无处散热)如果建永久基地,还可以在环形山口上架镜子往底下照赶快多射几个嫦娥
探测
器挖样品吧引用第2楼玄明于2010-03-02 15:34发表的 :那样水都会气化挥发掉的
单晶硅片的镀膜工艺(丐版)
AtomictekOWO
2年7个月前
发表于
晶体养成所
核技术与核仪器
动手实践: 实验报导
内容: 本实验是DIY半导体辐射
探测
器项目的一部分,与其说是一篇教程,不如说是一篇整活记录文。,(左侧为未镀膜的单抛高阻硅,右侧为镀膜成品)将镀膜后的硅片置于改装的丐版古董X射线荧光仪(正比计数管
探测
,低能光子源激发)上进行膜厚测量,取Cu的Kα谱线进行峰面积积分,测得膜层厚度约300nm 为进一步检测镀膜硅片的性质,由于本实验目的为制备半导体
探测
器的欧姆接触层,所以结果显而易见,寄了。
科学家声称数字革命导致地球很难被外星人发现
立棍
14年9个月前
回复于
极客DIY
内容:新浪科技讯 北京时间1月27日消息,据英国《每日电讯报》报道,美国“搜寻外星文明”组织创始人弗兰克-德拉克近日声称,由于数字革命的出现,现在地球已经很难被外星生命所发现,外星人将可能无法看到或
探测
到地球
安装kail linux
smith
9年6个月前
发表于
软件综合
内容:[s::lol],kail linux可以用来搞一些网络安全(黑阔)方面的事情,可以这么理解,kail linux集成了一系列工具,这些工具 可以用来网络
探测
、抓包、扫描、嗅探、渗透、远程控制、溢出,全部是好东西
第一套,自主设计保健操
铅球脑袋
3年0个月前
发表于
体育与技能
动手实践: 实验报导
内容:不过大概都可以使用我前面说的手指
探测
的方法,研究设计个人化锻炼方法。
DRSSTC基本原理
猎鹰
13年0个月前
回复于
高电压技术
内容:关于整张电路的分类比如哪部分是逻辑电路(追频,过流
探测
)和功率电路的驱动电路(放大电路)。
试制激光拉曼光谱仪(持续更新中)
GiroPetrenko
2年10个月前
发表于
仪器仪表
动手实践: 实验报导
内容:光谱仪使用之前分光光度计拆出的C-T式单色器,用一个工业相机作为
探测
器。
碘化钠闪烁体γ能谱仪的仿制
GiroPetrenko
4年9个月前
回复于
核技术与核仪器
内容:2020/03/12 更新~修复了闪烁体
探测
器的光学耦合,使用了显微镜香柏油。
试制极简电离辐射探测器
巨大橘子
2年6个月前
回复于
核技术与核仪器
内容:可能,没能
探测
到辐射,而是漏电之类的。。
大家来提点建议啊!投入实际科学测量的探空火箭...............
bh,王者归来
12年6个月前
发表于
喷气推进
内容:必要时联系加工者 型号的性能指标:除了在通用性能指标要求之外,对各个衍生型号做更详细的要求型号B:探空型 (详细见概要结构图) 仪器仓B需防火防爆炸 在开伞时必须不影响
探测
芯片,、记录器和电池工作,基于PM2.5
探测
模块工作原理,尽量减少开伞药烟尘对
探测
精度的影响。
又一个NaI(Tl)伽马能谱仪的制作
qiuzheru1
7个月1天前
回复于
核技术与核仪器
内容:其实这个
探测
器还有另一个没有解释的奇怪现象,它会以一个1 cps左右的频率,检测到一些异常强的信号脉冲。
核电池
mass_lynnxy
17年5个月前
回复于
极客DIY
内容:以下是引用jijiwaiwai在2007-2-22 23:07:58的发言:旅行者1号和2号用的都是热核电池啊.两艘旅行者号
探测
器都是以三块放射性同位素温差电池发电机作为动力来源的,这些发电机目前已经大大超出了起先的设计寿命
海量清仓处理,有盖格管、正比计数器、音频分析仪、电源等--活动已结束,请勿再汇款
虎哥
11年4个月前
回复于
跳蚤市场
内容:这个是进口设备拆下来的,原机主要用于
探测
γ射线,说明这种盖格管是针对γ射线优化过的。
超声合成孔径成像
zx-16533
6年4个月前
回复于
电子技术
内容:方案三(还没试过,不过应该是最可行的,但
探测
距离有点抓鸡):使用现成的Analog Dechirp方式的雷达模块,例如某宝上最便宜不到200大洋的这个: 看起来两路IF只需要经过高通(消除反馈)----,但是功率不大,
探测
距离较为有限。。,卖家提供的数据是FMCW模式距离速度
探测
汽车>30米,人>15米 ,垂直对水泥地面>30米Analog Dechirp方式由于将两路chirp信号混频,产生的回波相位除了与距离成线性的多普勒项,还有与距离成二次的
论自制红外传感器的可能
smith
5年8个月前
发表于
电子技术
内容:硫化铅对于红外辐射很敏感,非常适合应用于红外
探测
;同时,硫化铅也在二极管激光器、太阳能电池等领域有广泛的应用。,这让我想起十年前的光敏电阻,那时的光敏电阻长似乎也是这种材料的,看上去不想是单晶纯的,而是用某种胶结合的,工艺比较简单 如果找到合适的方法,能够自己制作光敏电阻,再制作四像限的
探测
器,最后扩展到CCD也不是没有可能呢
RJ33-1015辐射仪中子探头
巨大橘子
1年1个月前
发表于
核技术与核仪器
内容:很久以前在XXXXXXXXXXXXXXXXXXXXXXXX/t/87687中提到这台机器,几个月前看他们公告说停产了,本打算用于中子
探测
用,没多久就被³He正比管取代了,最近偶然又找到一台,这台的中子探头螺纹没卡死,实际使用上来说,硫化锌基闪烁体应该是中子
探测
门槛最低、效果也最不好的一种方式了,不提动辄耐受500R/h137Cs干扰的BF3和其他正比管,有热中子峰可看的锂玻璃和碘化锂晶体都是好得多的选择。
Gamma能谱仪之Ortec HPGe谱仪翻修
justinpiggy
4年10个月前
发表于
核技术与核仪器
动手实践: 实验报导
内容:无论是真的科研实验室还是爱好者,Gamma能谱仪的分辨率巅峰就是高纯锗(HPGe)
探测
器。,左侧圆柱状为
探测
器晶体所在位置,右侧为Cold Finger,用处是塞进液氮杜瓦里,把晶体冷却到液氮温区。,这台HPGe购自某二手仪器回收商,由Ortec生产,型号是GEM-40210,说明是1.33MeV时3inch直径3inch高NaI:Tl的40%的
探测
效率,分辨率应该是2.10keV@1.33MeV,,为了不让800刀就这样打水漂,接下来计划就是打开
探测
器外壳,更换JFET并重新抽真空。,积分了很久,高能端的基本都是环境本底,本底的钍链可以看到很多峰,这是闪烁体
探测
器比较难做到的,低能端通过和本底相减可以看到几个200keV左右的铀的峰,这个图上不是很明显。
KC761袖珍能谱分析仪(放射多用表)
kcma
26天23时前
专栏文章
科创仪表
内容:电视剧《切尔诺贝利》中的能谱分析仪仪器的特点和功能仪器的各部分如下图所示:(1)功能丰富 标配2.54cm3碘化铯(铊)闪烁
探测
器和9mm2PIN
探测
器,可以对甲、乙、丙三种射线进行测定。 ,PIN
探测
器极易受到电磁场干扰而产生误计数。,(计数率<10kcps时,按等脉冲周期考虑): 能量的附加不确定度: ,其中E是峰中心道址 计数率的附加不确定度:±(5%+2cps)(7)测量时间 能谱累积时间:1s~86400s可设定(闪烁
探测
器最高通过率,80kcps,PIN
探测
器最高通过率10kcps) 剂量累积时间:任意时间,自用户上次清除累积剂量起始,至查看累积剂量为止,非易失存储周期≤1h,关机保存。
[提问]星球扫描
hchc0834
10年7个月前
回复于
喷气推进
内容:我说要有光 发表于 2014-6-9 00:21 针对系外行星的
探测
手段是检测恒星亮度变化的周期,还有恒星本身被行星引力牵拉摇摆的情况。
玉兔二号试验小火箭联合设计规范参数
虎哥
13年8个月前
回复于
喷气推进
内容:要
探测
微气泡,B超分辨力不够,这种圆形的东西也相当难耦合。
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