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    SYSTEMS, DEVICES, AND METHODS FOR IN SITU LASER SHOCK PEENING DURING ADDITIVE MANUFACTURING
    61.
    发明公开
    SYSTEMS, DEVICES, AND METHODS FOR IN SITU LASER SHOCK PEENING DURING ADDITIVE MANUFACTURING 审中-公开

    公开(公告)号：US20240149350A1

    公开(公告)日：2024-05-09

    申请号：US18548639

    申请日：2022-04-15

    申请人： Massachusetts Institute of Technology

    发明人： Cemal Cem TASAN ,  Jiyun KANG

    IPC分类号： B22F10/64 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/20 ,  C21D10/00

    CPC分类号： B22F10/64 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/20 ,  C21D10/005

    摘要： Systems, devices, and methods for improved manufacturing of parts are disclosed. One or more devices realize in situ laser shock peening for selective laser melting process to allow for microstructural control of a manufactured part, both locally and globally. The device can include a platform, an energy source (e.g., a laser), an applier to provide one or more opaque materials to form an opaque overlay, and one or more transparent materials that is/are disposed above the deposited opaque material to form a transparent overlay. The platform can include at least a first conduit used with generating a shock wave as part of the peening process and a second conduit to receive a vacuum device for residue collection from the peening process. The platform can be configured to translate relative to the sample on which the peening process is performed such that printing, peening and vacuuming can be performed substantially simultaneously.

    Quantum Mixer to Sense Arbitrary-Frequency Fields
    67.
    发明公开
    Quantum Mixer to Sense Arbitrary-Frequency Fields 审中-公开

    公开(公告)号：US20240135224A1

    公开(公告)日：2024-04-25

    申请号：US18193730

    申请日：2023-03-31

    申请人： Massachusetts Institute of Technology

    发明人： Guoqing WANG ,  Yixiang LUI ,  Jennifer SCHLOSS ,  Scott ALSID ,  Danielle A. BRAJE ,  Paola CAPPELLARO

    IPC分类号： G06N10/40 ,  H04B10/70

    CPC分类号： G06N10/40 ,  H04B10/70

    摘要： Quantum sensors provide excellent performance combining high sensitivity with spatial resolution. Unfortunately, they can only detect signal fields at frequencies in a few accessible ranges, typically low frequencies up to the experimentally achievable control field amplitudes and a narrow window around their resonance frequencies. Fortunately, arbitrary-frequency signals can be detected by using the sensor qubit as a quantum frequency mixer, enabling a variety of sensing applications. The technique leverages nonlinear effects in periodically driven (Floquet) quantum systems to achieve quantum frequency mixing of the signal and an applied AC bias field. The frequency-mixed field can be detected using Rabi and CPMG sensing techniques with the bias field. Frequency mixing can distinguish vectorial components of an oscillating signal field, thus enabling arbitrary-frequency vector magnetometry. Using this protocol with nitrogen-vacancy centers in diamond to sense a 150 MHz signal field demonstrates the versatility of the quantum mixer sensing technique.