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1.发明授权公开(公告)号：US09839114B2
公开(公告)日：2017-12-05
申请号：US15260101
申请日：2016-09-08
摘要： A method for the suppression of upstream-directed field emission in RF accelerators. The method is not restricted to a certain number of cavity cells, but requires similar operating field levels in all cavities to efficiently annihilate the once accumulated energy. Such a field balance is desirable to minimize dynamic RF losses, but not necessarily achievable in reality depending on individual cavity performance, such as early Q0-drop or quench field. The method enables a significant energy reduction for upstream-directed electrons within a relatively short distance. As a result of the suppression of upstream-directed field emission, electrons will impact surfaces at rather low energies leading to reduction of dark current and less issues with heating and damage of accelerator components as well as radiation levels including neutron generation and thus radio-activation.
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公开(公告)号：US09872375B2
公开(公告)日：2018-01-16
申请号：US15415298
申请日：2017-01-25
发明人： Frank Marhauser , Fay Hannon , Robert Rimmer , R. Roy Whitney
IPC分类号： H05H7/22
摘要： A method for recovering energy from spent energy recovered linac (ERL) beams. The method includes adding a plurality of passive decelerating cavities at the beam dump of the ERL, adding one or more coupling waveguides between the passive decelerating cavities, setting an adequate external Q (Qext) to adjust to the beam loading situation, and extracting the RF energy through the coupling waveguides.
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3.发明申请LINEAR ACCELERATOR ACCELERATING MODULE TO SUPPRESS BACK-ACCELERATION OF FIELD-EMITTED PARTICLES 有权线性加速器加速模块，用于抑制场发射颗粒的反向加速公开(公告)号：US20170071054A1
公开(公告)日：2017-03-09
申请号：US15260101
申请日：2016-09-08
摘要： A method for the suppression of upstream-directed field emission in RF accelerators. The method is not restricted to a certain number of cavity cells, but requires similar operating field levels in all cavities to efficiently annihilate the once accumulated energy. Such a field balance is desirable to minimize dynamic RF losses, but not necessarily achievable in reality depending on individual cavity performance, such as early Q0-drop or quench field. The method enables a significant energy reduction for upstream-directed electrons within a relatively short distance. As a result of the suppression of upstream-directed field emission, electrons will impact surfaces at rather low energies leading to reduction of dark current and less issues with heating and damage of accelerator components as well as radiation levels including neutron generation and thus radio-activation.
摘要翻译： 一种用于抑制RF加速器中的上游定向场发射的方法。 该方法不限于一定数量的腔室，而是在所有空腔中需要相似的工作场地水平以有效地消除一次累积的能量。 这样的场平衡是期望的，以最小化动态RF损耗，但是实际上根据各个空腔性能，例如早期的Q0降或场淬灭场，不一定可实现。 该方法能够在相对短的距离内对上游导向电子进行显着的能量减少。 由于抑制上游导电场发射，电子将以相当低的能量冲击表面，导致暗电流的减少，加速和损坏加速器部件以及辐射水平的问题以及包括中子产生和放射性激活 。
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公开(公告)号：US10932355B2
公开(公告)日：2021-02-23
申请号：US15882211
申请日：2018-01-29
发明人： Gianluigi Ciovati , Thomas J. Schultheiss , John Rathke , Robert Rimmer , Frank Marhauser , Fay Hannon , Jiquan Guo
摘要： A high-current, compact, conduction cooled superconducting radio-frequency cryomodule for particle accelerators. The cryomodule will accelerate an electron beam of average current up to 1 ampere in continuous wave (CW) mode or at high duty factor. The cryomodule consists of a single-cell superconducting radio-frequency cavity made of high-purity niobium, with an inner coating of Nb3Sn and an outer coating of pure copper. Conduction cooling is achieved by using multiple closed-cycle refrigerators. Power is fed into the cavity by two coaxial couplers. Damping of the high-order modes is achieved by a warm beam-pipe ferrite damper.
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公开(公告)号：US20170215269A1
公开(公告)日：2017-07-27
申请号：US15415298
申请日：2017-01-25
发明人： Frank Marhauser , Fay Hannon , Robert Rimmer , R. Roy Whitney
IPC分类号： H05H7/22
摘要： A method for recovering energy from spent energy recovered linac (ERL) beams. The method includes adding a plurality of passive decelerating cavities at the beam dump of the ERL, adding one or more coupling waveguides between the passive decelerating cavities, setting an adequate external Q (Qext) to adjust to the beam loading situation, and extracting the RF energy through the coupling waveguides.
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