TRANSIENT GRATING TIME RESOLVED LUMINESCENCE MEASUREMENTS
    5.
    发明申请
    TRANSIENT GRATING TIME RESOLVED LUMINESCENCE MEASUREMENTS 有权
    瞬态光刻时间分辨光度测量

    公开(公告)号:US20160356644A1

    公开(公告)日:2016-12-08

    申请号:US15117598

    申请日:2015-02-05

    Abstract: A transient grating (TG) is used as an optical gating element with sub-picosecond time resolution for luminescence measurements from a photo-detector array. The transient grating is formed in a gate medium by one or more pulsed gate beams. For photoluminescence measurements such as photoluminescence spectroscopy or imaging, a source is excited by a pulsed excitation beam, and the pulsed gate beams are synchronized to the pulsed excitation beam with an adjustable delay between the excitation of the source and the formation of the TG. Moreover, a source or its spectra can be imaged at two different regions of the photo-detector array at two different times spaced in time by a selected duration of time with sub-picosecond resolution over a range of a nanosecond or more. A beam from the source is deflected to the different regions by changing the frequency or geometry of the pulsed gate beams.

    Abstract translation: 瞬态光栅(TG)被用作具有亚皮秒时间分辨率的来自光电检测器阵列的发光测量的光学门控元件。 瞬态光栅通过一个或多个脉冲栅极波束在栅极介质中形成。 对于诸如光致发光光谱或成像的光致发光测量,源通过脉冲激发光束激发,并且脉冲栅极光束与脉冲激发光束同步,在源的激发和TG的形成之间具有可调节的延迟。 此外,源或其光谱可以在光检测器阵列的两个不同的区域以两分之一的时间在一个纳秒或更多的范围内以一定的时间间隔以亚皮秒分辨率成像。 来自源极的光束通过改变脉冲栅极的频率或几何形状而偏转到不同的区域。

    Method and apparatus for cryogenic cooling of HTS devices immersed in liquid cryogen

    公开(公告)号:US11035598B2

    公开(公告)日:2021-06-15

    申请号:US15324617

    申请日:2015-07-06

    Inventor: Michael Staines

    Abstract: A thermally insulated vessel contains a thermal insulation barrier defining an upper compartment above the barrier and a lower compartment below the barrier. The compartments are interconnected by a passage to allow pressure equalization. High temperature superconductor is mounted within the lower compartment for immersion in the liquid cryogen. A cryogenic refrigerator has a cold head thermally coupled to the high temperature superconductor for maintaining the high temperature superconductor below a superconductive transition temperature. A temperature controller maintains a temperature of the liquid cryogen in the upper compartment at a temperature of at least a boiling point of the liquid cryogen at atmospheric pressure when the lower compartment and at least a portion of the upper compartment are filled with the liquid cryogen.

Patent Agency Ranking