Pub Date : 2004-07-18DOI: 10.1080/10519990512331324066
K. Masugata, R. Tejima, J. Kawai, I. Kitamura, H. Tanoue, K. Arai
Intense pulsed heavy ion beam (PHIB) of ion current density more than several tens of A/cm2 can be applied to materials processes. To apply PHIB to materials processes purity of the beam is very important. For the purpose a new type of ion beam diode was developed. In the diode a new acceleration gap configuration is used with active ion source of pulsed plasma guns. Two types of plasma guns were developed to generate variety of ion beams, i. e. a gas puff plasma gun and a vacuum arc ion source. With the gas puff plasma gun, source plasma of nitrogen ions was produced. The current density of the plasma was evaluated to be ≈28 A/cm2 at 90 mm downstream from the top of the plasma gun. The plasma was injected into the acceleration gap of the diode and the ion diode was successfully operated at diode voltage ≈200 kV, diode current ≈2.0 kA, pulse duration ~150 ns. Ion beam of ion current density ~13 A/cm2 was obtained at 55 mm downstream from the anode. The energy and species of the beam was evaluated by a Thomson parabola spectrometer and found that N+ and N2+ beam of energy 60-300 keV were accelerated with impurity of protons of energy 60-150 keV. The purity of the beam was estimated to be 87 %. To generate metallic ions vacuum arc plasma gun was developed. The characteristics of the plasma gun were evaluated and source plasma of current density 8 A/cm2, plasma drift velocity 4.7 × 104 m/s was found to be obtained.
{"title":"Generation of intense pulsed heavy ion beam by By type magnetically insulated ion diode with active ion source","authors":"K. Masugata, R. Tejima, J. Kawai, I. Kitamura, H. Tanoue, K. Arai","doi":"10.1080/10519990512331324066","DOIUrl":"https://doi.org/10.1080/10519990512331324066","url":null,"abstract":"Intense pulsed heavy ion beam (PHIB) of ion current density more than several tens of A/cm2 can be applied to materials processes. To apply PHIB to materials processes purity of the beam is very important. For the purpose a new type of ion beam diode was developed. In the diode a new acceleration gap configuration is used with active ion source of pulsed plasma guns. Two types of plasma guns were developed to generate variety of ion beams, i. e. a gas puff plasma gun and a vacuum arc ion source. With the gas puff plasma gun, source plasma of nitrogen ions was produced. The current density of the plasma was evaluated to be ≈28 A/cm2 at 90 mm downstream from the top of the plasma gun. The plasma was injected into the acceleration gap of the diode and the ion diode was successfully operated at diode voltage ≈200 kV, diode current ≈2.0 kA, pulse duration ~150 ns. Ion beam of ion current density ~13 A/cm2 was obtained at 55 mm downstream from the anode. The energy and species of the beam was evaluated by a Thomson parabola spectrometer and found that N+ and N2+ beam of energy 60-300 keV were accelerated with impurity of protons of energy 60-150 keV. The purity of the beam was estimated to be 87 %. To generate metallic ions vacuum arc plasma gun was developed. The characteristics of the plasma gun were evaluated and source plasma of current density 8 A/cm2, plasma drift velocity 4.7 × 104 m/s was found to be obtained.","PeriodicalId":256101,"journal":{"name":"2004 International Conference on High-Power Particle Beams (BEAMS 2004)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129719604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Buyko, Y. N. Oorbachev, A. I. Kuzyayev, V. Mokhov, V. A. Pavliy, A. Petrukhin, V. B. Yakubov, W. Atchison, I. Lindemuth, R. Reinovsky
This paper presents the construction-technology schematic of the device comprising the helical and disk EMGs with a three-layered cylindrical liner (Al-dielectric-Cu) designed for experiments RHSR-0, 1, 2 at the current of 33-35 MA. Polyethylene or water was used as a dielectric layer. The experiments tested successfully the idea to study the dynamic strength of materials by X-raying the growth of amplitude of axisymmetric sinusoidal perturbations machined initially on the outer surface of the examined inner layer of the liner.
{"title":"Explosive magnetic device with a three-layered liner for radiographic study of dynamic strength of materials","authors":"A. Buyko, Y. N. Oorbachev, A. I. Kuzyayev, V. Mokhov, V. A. Pavliy, A. Petrukhin, V. B. Yakubov, W. Atchison, I. Lindemuth, R. Reinovsky","doi":"10.1109/PPC.2005.300666","DOIUrl":"https://doi.org/10.1109/PPC.2005.300666","url":null,"abstract":"This paper presents the construction-technology schematic of the device comprising the helical and disk EMGs with a three-layered cylindrical liner (Al-dielectric-Cu) designed for experiments RHSR-0, 1, 2 at the current of 33-35 MA. Polyethylene or water was used as a dielectric layer. The experiments tested successfully the idea to study the dynamic strength of materials by X-raying the growth of amplitude of axisymmetric sinusoidal perturbations machined initially on the outer surface of the examined inner layer of the liner.","PeriodicalId":256101,"journal":{"name":"2004 International Conference on High-Power Particle Beams (BEAMS 2004)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115208313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The highly oriented pyrolytic graphite (HOPG) targets were irradiated with 70-120 J/cm2 of pulsed ion beams. The deposited energy by the ablation plasma onto the target was 0.8 J with 100 J/cm2 of the ion beam irradiation. The fast heating and fast quenching effects occurred on the target surfaces, and these effects can be enhanced at the higher energy density of beam irradiation. In the SEM analysis, sphere particles and whiskers which approximately 1 μm in diameter were observed on the irradiated surface. These whiskers may have been grown under the hydraulic pressure by the ablation plasma radiation.
{"title":"Modification of graphite surface by intense pulsed ion-beam irradiation","authors":"K. Kashine, H. Suematsu, W. Jiang, K. Yatsui","doi":"10.1541/IEEJFMS.124.47","DOIUrl":"https://doi.org/10.1541/IEEJFMS.124.47","url":null,"abstract":"The highly oriented pyrolytic graphite (HOPG) targets were irradiated with 70-120 J/cm2 of pulsed ion beams. The deposited energy by the ablation plasma onto the target was 0.8 J with 100 J/cm2 of the ion beam irradiation. The fast heating and fast quenching effects occurred on the target surfaces, and these effects can be enhanced at the higher energy density of beam irradiation. In the SEM analysis, sphere particles and whiskers which approximately 1 μm in diameter were observed on the irradiated surface. These whiskers may have been grown under the hydraulic pressure by the ablation plasma radiation.","PeriodicalId":256101,"journal":{"name":"2004 International Conference on High-Power Particle Beams (BEAMS 2004)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129872629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. A. Arinin, A. Buyko, O. Burenkov, B. T. Yegorychev, V. A. Vasyukov, Y. Gorbachev, V. Zmushko, G. O. Ivanova, A. V. Ivanovsky, A. I. Kuzyayev, A. Kulagin, I. V. Morozov, V. Mokhov, S. S. Nadezhin, P. N. Nizovtsev, V. Pavliy, S. V. Pak, G. Polienko, A. Petrukhin, A. I. Startsev, A. N. Skobelev, N. V. Sokolova, S. Sokolov, V. Soloviev, V. N. Sofronov, E. Khoroshailo, T. I. Chaika, V. B. Yakubov, B. Anderson, W. Atchison, R. Faehl, I. Lindemuth, Q. McCulloch, R. Olson, D. Oró, R. Reinovsky, G. Rodriguez, J. Stokes, L. Tabaka, D. Westley
In the three joint VNIIEFILANL experiments RHSR-0, 1,2 with a disk EMG and a three-layer liner system (Al-dielectric-eu) a method of radial radiography was used to study growth of perturbations amplitude at the boundary between copper layer and polyethylene (in experiments RHSR-0, 1) and water (in experiment RHSR-2); the growth occurs during the evolution of the Raleigh-Taylor instability of this boundary.
{"title":"A series of joint VNIIEF/LANL explosive magnetic experiments RHSR-0, 1, 2 on radiographic study of perturbations growth at a copper liner boundary with polyethylene or water","authors":"V. A. Arinin, A. Buyko, O. Burenkov, B. T. Yegorychev, V. A. Vasyukov, Y. Gorbachev, V. Zmushko, G. O. Ivanova, A. V. Ivanovsky, A. I. Kuzyayev, A. Kulagin, I. V. Morozov, V. Mokhov, S. S. Nadezhin, P. N. Nizovtsev, V. Pavliy, S. V. Pak, G. Polienko, A. Petrukhin, A. I. Startsev, A. N. Skobelev, N. V. Sokolova, S. Sokolov, V. Soloviev, V. N. Sofronov, E. Khoroshailo, T. I. Chaika, V. B. Yakubov, B. Anderson, W. Atchison, R. Faehl, I. Lindemuth, Q. McCulloch, R. Olson, D. Oró, R. Reinovsky, G. Rodriguez, J. Stokes, L. Tabaka, D. Westley","doi":"10.1109/PPC.2005.300664","DOIUrl":"https://doi.org/10.1109/PPC.2005.300664","url":null,"abstract":"In the three joint VNIIEFILANL experiments RHSR-0, 1,2 with a disk EMG and a three-layer liner system (Al-dielectric-eu) a method of radial radiography was used to study growth of perturbations amplitude at the boundary between copper layer and polyethylene (in experiments RHSR-0, 1) and water (in experiment RHSR-2); the growth occurs during the evolution of the Raleigh-Taylor instability of this boundary.","PeriodicalId":256101,"journal":{"name":"2004 International Conference on High-Power Particle Beams (BEAMS 2004)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114818662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dynamics of plasma jets ablated from separate wires in multiwire array is investigated theoretically under assumption that width of the jets in azimuth direction is much less than the interwire gap. Using these results, an updated estimation of plasma production rate, which takes into account the strong azimuth structure of the plasma flow, is obtained.
{"title":"Dynamics of plasma jets in multiwire arrays","authors":"P. Sasorov","doi":"10.1063/1.2159325","DOIUrl":"https://doi.org/10.1063/1.2159325","url":null,"abstract":"Dynamics of plasma jets ablated from separate wires in multiwire array is investigated theoretically under assumption that width of the jets in azimuth direction is much less than the interwire gap. Using these results, an updated estimation of plasma production rate, which takes into account the strong azimuth structure of the plasma flow, is obtained.","PeriodicalId":256101,"journal":{"name":"2004 International Conference on High-Power Particle Beams (BEAMS 2004)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115375820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Chuvatin, L. Rudakov, B. Weber, F. Bayol, R. Cadiergues
Modem pulse-power generators allow obtaining multi - Mega-Ampere currents with sub-microsecond rise-times in useful loads. However, at least during a portion of the rise-time, the load inductance, Ld, can be several times smaller than that of the generator, L0, limiting the energy transfer efficiency. We define a relatively simple circuit modification, which improves the generator-to-load coupling, multiplying the load current in the case of interest, where L0>;>;Ld. The suggested intermediate connection operates similarly to an N:1 transformer. In its simplest configuration, for N=2, the proposed current multiplier requires an additional volume having high self-inductance, L, connected through a single convolute to both generator and load. The modified hardware allows, having possibly one additional unknown, the convolute, and without changing the current rise-time very much an increase of the load current by the factor of Id/I0=2L/(L+Ld), where Io represents the generator current and L can be easily made much greater than Ld. The benefit of the scheme usage is illustrated in simple circuit simulations for two types of potential applications with static, Ld = const, and dynamic, Ld(t), loads.
{"title":"Current multiplier to improved generator-to-load coupling for pulse-power generators","authors":"A. Chuvatin, L. Rudakov, B. Weber, F. Bayol, R. Cadiergues","doi":"10.1063/1.1928450","DOIUrl":"https://doi.org/10.1063/1.1928450","url":null,"abstract":"Modem pulse-power generators allow obtaining multi - Mega-Ampere currents with sub-microsecond rise-times in useful loads. However, at least during a portion of the rise-time, the load inductance, Ld, can be several times smaller than that of the generator, L0, limiting the energy transfer efficiency. We define a relatively simple circuit modification, which improves the generator-to-load coupling, multiplying the load current in the case of interest, where L0>;>;Ld. The suggested intermediate connection operates similarly to an N:1 transformer. In its simplest configuration, for N=2, the proposed current multiplier requires an additional volume having high self-inductance, L, connected through a single convolute to both generator and load. The modified hardware allows, having possibly one additional unknown, the convolute, and without changing the current rise-time very much an increase of the load current by the factor of Id/I0=2L/(L+Ld), where Io represents the generator current and L can be easily made much greater than Ld. The benefit of the scheme usage is illustrated in simple circuit simulations for two types of potential applications with static, Ld = const, and dynamic, Ld(t), loads.","PeriodicalId":256101,"journal":{"name":"2004 International Conference on High-Power Particle Beams (BEAMS 2004)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124725095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Volkov, V. I. Zaĭtsev, A. Kartashov, N. I. Lahtushko, A. Rupasov, A. S. Shikanov
Spectral characteristics of plasma radiation of a gas Z-pinch with a rise time of 1 μs and current amplitude of 250 kA have been measured. The measurements were performed in the range of X-ray energy quanta from 30 eV to 600 eV. A spectrograph with a transmission grating and a polychromator on the basis of multilayer X-ray mirrors served as the diagnostic devices. Absolutely calibrated semiconducting detectors AXUV-5 were taken as the radiation detector in the polychromator. Full pinch radiation loss was measured with a thermocouple calorimeter. The radiation of He-, Li- and Be- like ions has been shown to dominate at the stage of maximum compression of the nitrogen Z-pinch. The results of the spectral measurements were employed for absolute calibration of various X-ray detectors. Some of these calibration results are presented in the work. Using Ne and Ar as the working gases permits us to proceed to measurements in a ≪harder≫ spectral band and to conduct a detailed study of the line radiation polarization degree for He- like ions of the given elements.
{"title":"Microsecond Z-pinch as ultrasoft X-ray radiation source","authors":"G. Volkov, V. I. Zaĭtsev, A. Kartashov, N. I. Lahtushko, A. Rupasov, A. S. Shikanov","doi":"10.1051/JP4:2006133158","DOIUrl":"https://doi.org/10.1051/JP4:2006133158","url":null,"abstract":"Spectral characteristics of plasma radiation of a gas Z-pinch with a rise time of 1 μs and current amplitude of 250 kA have been measured. The measurements were performed in the range of X-ray energy quanta from 30 eV to 600 eV. A spectrograph with a transmission grating and a polychromator on the basis of multilayer X-ray mirrors served as the diagnostic devices. Absolutely calibrated semiconducting detectors AXUV-5 were taken as the radiation detector in the polychromator. Full pinch radiation loss was measured with a thermocouple calorimeter. The radiation of He-, Li- and Be- like ions has been shown to dominate at the stage of maximum compression of the nitrogen Z-pinch. The results of the spectral measurements were employed for absolute calibration of various X-ray detectors. Some of these calibration results are presented in the work. Using Ne and Ar as the working gases permits us to proceed to measurements in a ≪harder≫ spectral band and to conduct a detailed study of the line radiation polarization degree for He- like ions of the given elements.","PeriodicalId":256101,"journal":{"name":"2004 International Conference on High-Power Particle Beams (BEAMS 2004)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116551272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-07-18DOI: 10.1109/PLASMA.2004.1340000
M. Anderson, M. Binderbauer, V. Bystritskii, E. Garate, N. Rostoker, Yuanxu Song, A. Van Drie
The paper summarizes the recent experiments on the injection and transport across applied B-field of an intense, wide cross-section (~10 cm) H+ plasma (PB) and ion (IB) beam of 60 to 120 eV and 60 to 120 keV energy, respectively, in vacuum and ambient magnetized H+ plasma of temperature Ti~5 eV and density of 1012-1013 cm-3. With current densities of 10-30 A/cm2, the PB and IB propagated were undeflected in vacuum with a measurable loss of peripheral layers. At B-fields >;0.8 kG, only the narrow central core of the PB survived accompanied by a sharp increase in core density due to braking and respective bunching. Cross B-field propagation of the PB in ambient plasma (AP) was also undeflected, however, with less peripheral losses and a lack of bunching which can be interpreted as an inadequate shorting of the induced polarization E-field and therefore is described as E×B transport. The IB in magnetized ambient plasma, as a whole, followed a one-particle Larmor trajectory corresponding to an adequate shorting of the polarization E-field along with a significant loss of intensity.
{"title":"Propagation across B-field of intense plasma and ion beams in vacuum and magnetized plasma","authors":"M. Anderson, M. Binderbauer, V. Bystritskii, E. Garate, N. Rostoker, Yuanxu Song, A. Van Drie","doi":"10.1109/PLASMA.2004.1340000","DOIUrl":"https://doi.org/10.1109/PLASMA.2004.1340000","url":null,"abstract":"The paper summarizes the recent experiments on the injection and transport across applied B-field of an intense, wide cross-section (~10 cm) H+ plasma (PB) and ion (IB) beam of 60 to 120 eV and 60 to 120 keV energy, respectively, in vacuum and ambient magnetized H+ plasma of temperature Ti~5 eV and density of 1012-1013 cm-3. With current densities of 10-30 A/cm2, the PB and IB propagated were undeflected in vacuum with a measurable loss of peripheral layers. At B-fields >;0.8 kG, only the narrow central core of the PB survived accompanied by a sharp increase in core density due to braking and respective bunching. Cross B-field propagation of the PB in ambient plasma (AP) was also undeflected, however, with less peripheral losses and a lack of bunching which can be interpreted as an inadequate shorting of the induced polarization E-field and therefore is described as E×B transport. The IB in magnetized ambient plasma, as a whole, followed a one-particle Larmor trajectory corresponding to an adequate shorting of the polarization E-field along with a significant loss of intensity.","PeriodicalId":256101,"journal":{"name":"2004 International Conference on High-Power Particle Beams (BEAMS 2004)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128979597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-07-18DOI: 10.1080/10519990500048496
V. Engelko
To obtain spatially and temporally stable electron beams with the help of explosive emission cathodes the following measures are recommended: the cathode is made as a multi-point structure; points are made from bunches of carbon fibers; in a circuit of each point a resistor of certain value is inserted; all auxiliaries cathode elements are maintained under cathode plasma floating potential; speed of voltage increase at the pulse front must be higher than 108 V/s. On the base of this technology the cathodes of different geometry and size for production of flat, cylindrical, tubular, radial converting electron beams can be created. Such electron beams are used for generation of microwave- and x-ray radiation, pumping gas lasers, modification of material properties, etc. Examples of facilities design and electron beam applications are presented.
{"title":"Formation of stable longpulse electron beams with the help of explosive emission cathodes","authors":"V. Engelko","doi":"10.1080/10519990500048496","DOIUrl":"https://doi.org/10.1080/10519990500048496","url":null,"abstract":"To obtain spatially and temporally stable electron beams with the help of explosive emission cathodes the following measures are recommended: the cathode is made as a multi-point structure; points are made from bunches of carbon fibers; in a circuit of each point a resistor of certain value is inserted; all auxiliaries cathode elements are maintained under cathode plasma floating potential; speed of voltage increase at the pulse front must be higher than 108 V/s. On the base of this technology the cathodes of different geometry and size for production of flat, cylindrical, tubular, radial converting electron beams can be created. Such electron beams are used for generation of microwave- and x-ray radiation, pumping gas lasers, modification of material properties, etc. Examples of facilities design and electron beam applications are presented.","PeriodicalId":256101,"journal":{"name":"2004 International Conference on High-Power Particle Beams (BEAMS 2004)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125037950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Mazarakis, C. Deeney, M. Douglas, W. Stygar, D. Sinars, M. Cuneo, J. Chittenden, G. Chandler, T. Nash, K. Struve, D. Mcdaniel
We report results of the experimental campaign which studied the initiation, implosion dynamics and radiation yield of tungsten wire arrays as a function of the wire number. The wire array dimensions and mass were those of interest for the Z-pinch driven ICF program. An optimization study of the X-ray emitted peak power, rise time and FWHM was effectuated by varying the wire number while keeping the total array mass constant and equal to ~5.8 mg. The driver utilized is the ~20 MA Z accelerator in its usual short pulse mode of 100 ns. We studied single arrays of 20 mm diameter and 1 cm height. The smaller wire number studied was 30 and the largest 600. It appears that 600 is the highest achievable wire number with present day's technology. Radial and axial diagnostics were utilized including crystal monochromatic X-ray backlighter. An optimum wire number of ~370 was observed which is very close to the routinely utilized 300 for the ICF program in Sandia.
本文报道了钨丝阵列的起爆、内爆动力学和辐射产率随线数变化的实验结果。线阵的尺寸和质量是z捏驱动的ICF程序感兴趣的。在保持阵列总质量为~5.8 mg的情况下，通过改变线数对x射线发射峰值功率、上升时间和频宽进行优化研究。利用的驱动器是~20 MA Z加速器在其通常的短脉冲模式100毫纳。我们研究了直径20毫米，高度1厘米的单阵列。最小的电线数是30根，最大的是600根。看来600是目前技术所能达到的最高线材数。利用晶体单色x射线背光器进行径向和轴向诊断。观察到的最佳导线数为~370，非常接近桑迪亚ICF项目常规使用的300。
{"title":"Wire number dependence of the implosion dynamics, stagnation and radiation output of tungsten wire arrays at Z","authors":"M. Mazarakis, C. Deeney, M. Douglas, W. Stygar, D. Sinars, M. Cuneo, J. Chittenden, G. Chandler, T. Nash, K. Struve, D. Mcdaniel","doi":"10.1063/1.3657421","DOIUrl":"https://doi.org/10.1063/1.3657421","url":null,"abstract":"We report results of the experimental campaign which studied the initiation, implosion dynamics and radiation yield of tungsten wire arrays as a function of the wire number. The wire array dimensions and mass were those of interest for the Z-pinch driven ICF program. An optimization study of the X-ray emitted peak power, rise time and FWHM was effectuated by varying the wire number while keeping the total array mass constant and equal to ~5.8 mg. The driver utilized is the ~20 MA Z accelerator in its usual short pulse mode of 100 ns. We studied single arrays of 20 mm diameter and 1 cm height. The smaller wire number studied was 30 and the largest 600. It appears that 600 is the highest achievable wire number with present day's technology. Radial and axial diagnostics were utilized including crystal monochromatic X-ray backlighter. An optimum wire number of ~370 was observed which is very close to the routinely utilized 300 for the ICF program in Sandia.","PeriodicalId":256101,"journal":{"name":"2004 International Conference on High-Power Particle Beams (BEAMS 2004)","volume":"522 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123442175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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