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The 17th International Conference on High-Power Particle Beams

作者： Kenneth W.Struve Lawrence F.Bennett Jean-Paul Davis Mark E.Savage David L.Smith william a.stygar Timothy F.Chavez David D.Hinshelwood Tim C.Wagoner Sandia National Laboratories P.O.Box 5800AlbuquerqueNM 87185-1194USA EG&G 2420 Comanche Rd.NEAlbuquerqueNM87107 USA Naval Research Laboratory WashingtonDCUSA Ktech Corporation 10800 Gibson Blvd.SEAlbuquerqueNM87123USA

＜正＞Now that the refurbishment of the Z machine at Sandia is complete we are routinely operating with currents over 26 MA into various *** routine operation we are able to measure current and voltage throughout the machine and compare with circuit code predictions. These measurements have motivated improvements to the original model to include two-dimensional （2D） and three-dimensional （3D） *** this paper we describe a full-machine （36 module）,one-dimensional （1D） circuit model of Z using the Bertha code developed at the Naval Research *** also describe a model that uses 2D *** addition,we discuss plans for implementing a 3D circuit model to allow investigating azimuthal effects that can be important for tailoring the rise time,shape,and length of the Z output *** tailoring on Z is achieved by staggering the timing of the various pulsed-forming modules,and by operating individual modules in either long or short-pulse *** the individual lines combine at a large diameter and are separated azimuthally, transit-time effects can be important for determining transient field enhancements at the vacuum insulator and in the vacuum transmission lines,as well as pulse "shape. Finally,we compare the 1D and 2D models with data, and provide predictions for both short and long pulse modes for various load configurations.

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A Low Cost LTCC Material System for Packaging Applications

A Low Cost LTCC Material System for Packaging Applications

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第四届电子封装国际研讨会

作者： Liang Chai Aziz Shaikh Jim Henry Vern stygar Ferro Electronic Materials 1395 Aspen Way Vista California 92083

＜正＞Low Temperature Co-fired Ceramic（LTCC） is increasingly being adopted as the technology of choice for packaging and interconnects in wireless *** wireless applications require packaging materials with high performance,high volume manufacturing capability,and low *** generation LTCC tape and silver-based conductors were developed to address the needs of consumer wireless packaging *** new LTCC tape（A6S） is suitable for large volume manufacturing and maintains the low loss characteristics of traditional *** dielectric properties of the fired A6 ceramic were measured over a wide range of *** loss tangent is below 0.002 up to 95 GHz. The new generation silver conductor system is developed to minimize conductor *** metallurgy is used for the solderable surface conductors,which is in contrast to the traditional Ag/Pd and Ag/Pt *** pure silver metallurgy reduces cost and improves microwave performance,while offering improved solder leach *** attenuation of the silver conductors was tested using the ring resonator configuration from 1 to 25 *** new generation surface silver conductor shows dramatic improvement over the Ag/Pd surface conductor in microwave *** silver surface conductor also shows excellent initial and aged adhesion,excellent conductivity,and excellent solderability and leach resistance. The shrinkage of inner layer conductor is matched with that of *** via-fill conductor has excellent electrical and thermal *** current available technologies for fine line printing are also discussed.

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Conceptual design of a 15-TW pulsed-power accelerator for high-energy-densityephysics experiments

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Matter and Radiation at Extremes 2017年第4期2卷 204-223页

作者： R.B.Spielman D.H.Froula G.Brent E.M.Campbell D.B.Reisman M.E.Savage M.J.Shoup III W.a.stygar M.L.Wisher Laboratory for Laser Energetics University of RochesterRochesterNY14623USA Sandia National Laboratories AlbuquerqueNM 87185USA

We have developed a conceptual design of a 15-TW pulsed-power accelerator based on the linear-transformer-driver(LTD)architecture described by stygar[*** et al.,*** *** 18,110401(2015)].The driver will allow multiple,high-energy-density experiments per day in a university environment and,at the same time,will enable both fundamental and integrated experiments that are scalable to larger *** this design,many individual energy storage units(bricks),each composed of two capacitors and one switch,directly drive the target load without additional pulse *** LTD modules in parallel drive the *** module consists of 16 LTD cavities connected in series,where each cavity is powered by 22 bricks connected in *** design stores up to 2.75 MJ and delivers up to 15 TW in 100 ns to the constant-impedance,water-insulated radial transmission *** transmission lines in turn deliver a peak current as high as 12.5 MA to the physics *** maximize its experimental value and flexibility,the accelerator is coupled to a modern,multibeam laser facility(four beams with up to 5 kJ in 10 ns and one beam with up to 2.6 kJ in 100 ps or less)that can provide auxiliary heating of the physics *** lasers also enable advanced diagnostic techniques such as X-ray Thomson scattering and multiframe and three-dimensional *** coupled accelerator-laser facility will be the first of its kind and be capable of conducting unprecedented high-energy-densityephysics experiments.

关键词： Pulsed power accelerator High energy density physics Conceptual design

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