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    • 4. 发明申请
    • METHOD AND APPARATUS FOR EXTERNAL CAVITY LASER ABSORPTION SPECTROSCOPY
    • 外部激光吸收光谱法的方法与装置
    • WO2014029971A1
    • 2014-02-27
    • PCT/GB2013/052138
    • 2013-08-09
    • THE SCIENCE AND TECHNOLOGY FACILITIES COUNCIL
    • WEIDMANN, DamienBROWNSWORD, Richard
    • G01N21/39
    • G01N21/39G01J3/42G01J2003/423G01N21/3504G01N2021/396G01N2201/022G01N2201/06113
    • Method and apparatus for external cavity laser absorption spectroscopy There is disclosed an apparatus, and corresponding methods, for determining one or more characteristics of a sample in an absorption cell using laser absorption spectroscopy. For example, the characteristic may be concentration of a species in the sample. The apparatus comprises an external cavity semiconductor laser comprising a semiconductor gain medium within an optical resonator. The absorption cell is located within the optical resonator of the external cavity semiconductor laser so as to be optically coupled with the gain medium. A controller is arranged to provide a varied injection current to the semiconductor gain medium. A photodetector is arranged to detect laser light output by the external cavity semiconductor laser. An analyser is arranged to determine one or more characteristics of the sample from behaviour of the detected laser light output as a function of the varied injection current.
    • 用于外腔激光吸收光谱的方法和装置公开了一种用于使用激光吸收光谱确定吸收单元中的样品的一个或多个特性的装置和相应的方法。 例如,特征可以是样品中物种的浓度。 该装置包括在光谐振器内包括半导体增益介质的外腔半导体激光器。 吸收单元位于外腔半导体激光器的光学谐振器内,以便与增益介质光耦合。 控制器被布置成向半导体增益介质提供变化的注入电流。 光检测器被布置成检测由外腔半导体激光器输出的激光。 分析器被布置成根据检测到的激光输出的行为来确定样品的一个或多个特性作为改变的注射电流的函数。
    • 5. 发明申请
    • CRYOSTAT
    • 低温恒温器
    • WO2013179011A1
    • 2013-12-05
    • PCT/GB2013/051397
    • 2013-05-28
    • THE SCIENCE AND TECHNOLOGY FACILITIES COUNCIL
    • KIRICHEK, Oleg
    • F25B9/14
    • F17C13/00F25B9/10F25B9/14F25B9/145F25B2309/1424
    • A cryostat (10) is disclosed having a multistage cryocooler (20) with at least first and final cooling stages (22,32), and first and final stage heat exchangers (24,34) thermally coupled to the corresponding cooling stages for cooling a cryogen passing along a cooling path (15). The cooling path (15) further comprises a terminal cooling chamber (40) arranged to receive the cryogen from the final stage heat exchanger (34). The terminal cooling chamber (40) is also thermally coupled to the final cooling stage (32) so as to further cool the cryogen. The terminal cooling chamber (40) may include baffles (210) for directing the cryogen along an extended path through the terminal cooling chamber (40).
    • 公开了一种低温恒温器(10),具有具有至少第一和最终冷却级(22,32)的多级制冷器(20),以及热耦合到相应的冷却级的第一级和最终级热交换器(24,34) 冷冻剂沿着冷却路径(15)通过。 冷却通道(15)还包括端子冷却室(40),其被布置成从最终级热交换器(34)接收冷冻剂。 端子冷却室(40)也热耦合到最终冷却级(32),以进一步冷却冷冻剂。 端子冷却室(40)可以包括用于沿着延伸路径引导冷冻剂通过端子冷却室(40)的挡板(210)。
    • 7. 发明申请
    • IMPROVED MULTIPOLE MAGNET
    • 改进的多磁铁
    • WO2012046036A1
    • 2012-04-12
    • PCT/GB2011/051879
    • 2011-10-04
    • THE SCIENCE AND TECHNOLOGY FACILITIES COUNCILCLARKE, James AnthonySHEPHERD, Benjamin John ArthurMARKS, NeilCOLLOMB, Norbert
    • CLARKE, James AnthonySHEPHERD, Benjamin John ArthurMARKS, NeilCOLLOMB, Norbert
    • H05H7/04H01F7/20
    • H01F7/02H01F7/0278H05H7/04
    • A multipole magnet for deflecting a beam of charged particles, comprising: a plurality of ferromagnetic poles arranged in a pole plane; a plurality of permanent magnets each having a magnetisation direction, and each being arranged to supply magnetomotive force to the plurality of ferromagnetic poles to produce a magnetic field along the pole plane in a beamline space between the poles; and a plurality of ferromagnetic flux conducting members arranged to channel magnetic flux from at least one of the plurality of permanent magnets; wherein the multipole magnet comprises an even number of ferromagnetic poles, each pole being arranged to diametrically oppose another of the poles in the pole plane along a pole axis, wherein each of the plurality of permanent magnets is associated with at least one of the plurality of poles and the magnetisation direction of each permanent magnet isorientated in the pole plane at an angle of at least 45° relative to the pole axis of the associated pole.
    • 一种用于偏转带电粒子束的多极磁体,包括:设置在极平面中的多个铁磁极; 多个永磁体,每个具有磁化方向,并且每个永磁体被布置成向所述多个铁磁极提供磁动势,以在所述极之间的束线空间中沿着所述极平面产生磁场; 以及多个铁磁通量传导构件,其布置成用于引导来自所述多个永磁体中的至少一个的磁通量; 其中所述多极磁体包括偶数个铁磁极,每个极被布置为沿极轴与所述极平面中的另一极直径相对,其中所述多个永磁体中的每一个与所述多个磁极中的至少一个相关联, 每个永久磁铁的磁化方向在磁极平面中相对于相关电极的极轴以至少45°的角度取向。