Pub Date : 2017-06-01DOI: 10.1109/ppc.2017.8291224
C. H. Burke, Paul W. Smith
The lack of availability of small, fast, switches such as krytrons (e.g. EG&G KN 6) and thyratrons (e.g. E2V FX2530) makes the design of high voltage spark gap trigger units problematic. This paper will describe a 100kV trigger generator which is switched using a high voltage, high current IGBT switch module. A capacitor, charged up to 6kV, is discharged with the IGBT into the primary of a high gain autotransformer, the secondary of which is connected to the output of the generator. The transformer is wound with copper and mylar foils on to an amorphous metal glass core which is carefully gapped to avoid core saturation. One of the advantages of this all-solid-state generator is that it can easily be triggered by a TTL input pulse and the throughput delay and jitter of the generator is well characterised. Hence it is then very easy to synchronise a pulsed power system, triggered by this generator, to any diagnostic measurements that may need to be made. Output pulse rise-times from the trigger generator are ≥ 150 ns and a simple pulse sharpening circuit can be added to the output circuit of the pulse transformer which can reduce the rise-time to durations which are short enough to promote multi-channelling in rail-gaps. Basic circuit and transformer calculations are described which explain the trade-off between voltage gain from the primary to the secondary circuits of the transformer and the rise-time of the output pulse.
{"title":"A 100kV, IGBT switched, spark gap trigger generator","authors":"C. H. Burke, Paul W. Smith","doi":"10.1109/ppc.2017.8291224","DOIUrl":"https://doi.org/10.1109/ppc.2017.8291224","url":null,"abstract":"The lack of availability of small, fast, switches such as krytrons (e.g. EG&G KN 6) and thyratrons (e.g. E2V FX2530) makes the design of high voltage spark gap trigger units problematic. This paper will describe a 100kV trigger generator which is switched using a high voltage, high current IGBT switch module. A capacitor, charged up to 6kV, is discharged with the IGBT into the primary of a high gain autotransformer, the secondary of which is connected to the output of the generator. The transformer is wound with copper and mylar foils on to an amorphous metal glass core which is carefully gapped to avoid core saturation. One of the advantages of this all-solid-state generator is that it can easily be triggered by a TTL input pulse and the throughput delay and jitter of the generator is well characterised. Hence it is then very easy to synchronise a pulsed power system, triggered by this generator, to any diagnostic measurements that may need to be made. Output pulse rise-times from the trigger generator are ≥ 150 ns and a simple pulse sharpening circuit can be added to the output circuit of the pulse transformer which can reduce the rise-time to durations which are short enough to promote multi-channelling in rail-gaps. Basic circuit and transformer calculations are described which explain the trade-off between voltage gain from the primary to the secondary circuits of the transformer and the rise-time of the output pulse.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123428285","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 : 2017-06-01DOI: 10.1109/PPC.2017.8291329
A. Rousskikh, A. Artyomov, A. Zhigalin, A. Fedunin, V. Oreshkin, R. Baksht
Currently, along with the wire array and gas-puff Z-pinches, the Metal-Puff Z-pinches (based on vacuum arc discharge systems) are used [1]. The advantages of Metal-Puff Z-pinches are: A — significant initial conductivity (~ 104 Ohm−1-m−1 [2]) and consequently, the absence of a problem with a “cold start”, B — possibility of reusable use and C — stable Z-pinch implosion. One of the most important parameters of the liner shell is the substance distribution (both across and along its length). The most informative method for investigation of the dense plasma stream distribution is X-pinch radiography (the spatial resolution is about of 10 μm, while the temporal resolution is about of 1 ns [3]). The diagnostics in combination with the step-wedge manufactured from the same material as the investigated plasma, allows carrying out not only qualitative but also quantitative analysis of the plasma flow structure. The main aim of the work was to determine the distribution of the plasma jet mass per unit length for different geometry of the plasma jet formation.
{"title":"Radiographic research of the metal-puff plasma jets formed by the vacuum arc discharge","authors":"A. Rousskikh, A. Artyomov, A. Zhigalin, A. Fedunin, V. Oreshkin, R. Baksht","doi":"10.1109/PPC.2017.8291329","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291329","url":null,"abstract":"Currently, along with the wire array and gas-puff Z-pinches, the Metal-Puff Z-pinches (based on vacuum arc discharge systems) are used [1]. The advantages of Metal-Puff Z-pinches are: A — significant initial conductivity (~ 104 Ohm−1-m−1 [2]) and consequently, the absence of a problem with a “cold start”, B — possibility of reusable use and C — stable Z-pinch implosion. One of the most important parameters of the liner shell is the substance distribution (both across and along its length). The most informative method for investigation of the dense plasma stream distribution is X-pinch radiography (the spatial resolution is about of 10 μm, while the temporal resolution is about of 1 ns [3]). The diagnostics in combination with the step-wedge manufactured from the same material as the investigated plasma, allows carrying out not only qualitative but also quantitative analysis of the plasma flow structure. The main aim of the work was to determine the distribution of the plasma jet mass per unit length for different geometry of the plasma jet formation.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"265 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123696559","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 : 2017-06-01DOI: 10.1109/PPC.2017.8291238
X. Fang, H. Ding, J. Zuo, Qingjian Wang, Zhangfei Zhao, Yongheng Huang, Jun Zhou
A novel transcranial magnetic stimulator with innovative geometric coil design is proposed in this paper. The stimulator is mainly composed of a charging circuit, a discharge circuit and a stimulating coil. A feedback loop with a bidirectional thyristor is adopted in the discharge circuit to recover energy. The stimulating coil is designed into a coil pair with an irregular form of cambered surface. Finite-Element Method (FEM) is used to analyze the distributions of intracranial induced electromagnetic field. To unify evaluation standard, a comparison function reflecting multiple physiological properties of intracranial induced field is constructed. Comparing to conventional structure, the optimization of this design can enhance the peak of stimulus intensity for 92.29%, raise the value of RPN for 66.75% while improving the overall performance by 166.12%. The new stimulator makes it possible to obtain superior intracranial focusing field in targeted tissues with lower exciting current and the comparison function has important guiding significance for coil design.
{"title":"A novel design of transcranial magnetic stimulator","authors":"X. Fang, H. Ding, J. Zuo, Qingjian Wang, Zhangfei Zhao, Yongheng Huang, Jun Zhou","doi":"10.1109/PPC.2017.8291238","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291238","url":null,"abstract":"A novel transcranial magnetic stimulator with innovative geometric coil design is proposed in this paper. The stimulator is mainly composed of a charging circuit, a discharge circuit and a stimulating coil. A feedback loop with a bidirectional thyristor is adopted in the discharge circuit to recover energy. The stimulating coil is designed into a coil pair with an irregular form of cambered surface. Finite-Element Method (FEM) is used to analyze the distributions of intracranial induced electromagnetic field. To unify evaluation standard, a comparison function reflecting multiple physiological properties of intracranial induced field is constructed. Comparing to conventional structure, the optimization of this design can enhance the peak of stimulus intensity for 92.29%, raise the value of RPN for 66.75% while improving the overall performance by 166.12%. The new stimulator makes it possible to obtain superior intracranial focusing field in targeted tissues with lower exciting current and the comparison function has important guiding significance for coil design.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123995836","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 : 2017-06-01DOI: 10.1109/PPC.2017.8291327
E. Ruden
Design considerations and initial static charge and transient discharge simulations using COMSOL Multiphysics™ are presented for pulse-forming transmission (T-) line modules designed to be stacked, charged in parallel, and discharged in series. Each module is designed to use a rigid injection-molded dielectric cast in halves to accommodate the center conductor, and with a helical discharge path of constant real impedance Z. High peak energy density U0 for high initial charge voltage V0 is possible with such materials made of ceramic or ceramic powder-polymer composite. The helical path permits a high volume utilization efficiency η (effective system mean energy density/U0) for compact applications. Given the system's cylindrical return conductor housing of outer radius R and height H, TV02 = 4πR2HηU0Z for an impedance-matched load. Here, T is the time interval for which the load current and voltage are within the ranges for which the load is effectively driven (neglecting rise and fall times). The model is fully parameterized so, for example, each module's rectangular cross-section T-line aspect ratio AT (width/height) and helical aspect ratio AH (T-line center to helical axis distance/T-line half-width) are free to be varied. This allows for a wide range of system configurations to be studied with minimal effort. Given an optimized T-line inner conductor shape, the contribution to η from the T-line itself is about 1/3 for the AT = 1 — 4 range studied. The minimum AH considered is 2, giving an T-line volume fraction upper bound of 8/9 relative to the minimum cylindrical volume containing it. Their product implies an upper bound on η of about 0.3 Other system requirements, such as extra length and possibly higher AH needed to accommodate a low-inductance multi-channel spark-gap switch between modules and a spark-gap trigger circuit interior to the helix, respectively, and insulation for the erected voltage breakout and between the stages and return conductor, lower η further.
{"title":"Helical pulse-forming transmission line stack for compact pulsed power applications — Design and simulation","authors":"E. Ruden","doi":"10.1109/PPC.2017.8291327","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291327","url":null,"abstract":"Design considerations and initial static charge and transient discharge simulations using COMSOL Multiphysics™ are presented for pulse-forming transmission (T-) line modules designed to be stacked, charged in parallel, and discharged in series. Each module is designed to use a rigid injection-molded dielectric cast in halves to accommodate the center conductor, and with a helical discharge path of constant real impedance Z. High peak energy density U0 for high initial charge voltage V0 is possible with such materials made of ceramic or ceramic powder-polymer composite. The helical path permits a high volume utilization efficiency η (effective system mean energy density/U0) for compact applications. Given the system's cylindrical return conductor housing of outer radius R and height H, TV02 = 4πR2HηU0Z for an impedance-matched load. Here, T is the time interval for which the load current and voltage are within the ranges for which the load is effectively driven (neglecting rise and fall times). The model is fully parameterized so, for example, each module's rectangular cross-section T-line aspect ratio AT (width/height) and helical aspect ratio AH (T-line center to helical axis distance/T-line half-width) are free to be varied. This allows for a wide range of system configurations to be studied with minimal effort. Given an optimized T-line inner conductor shape, the contribution to η from the T-line itself is about 1/3 for the AT = 1 — 4 range studied. The minimum AH considered is 2, giving an T-line volume fraction upper bound of 8/9 relative to the minimum cylindrical volume containing it. Their product implies an upper bound on η of about 0.3 Other system requirements, such as extra length and possibly higher AH needed to accommodate a low-inductance multi-channel spark-gap switch between modules and a spark-gap trigger circuit interior to the helix, respectively, and insulation for the erected voltage breakout and between the stages and return conductor, lower η further.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129942086","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 : 2017-06-01DOI: 10.1109/PPC.2017.8291207
M. Kim, J. Forbes, A. Bilbao, J. Schrock, S. Bayne
The evaluation of pulsed power systems and their constituent components requires unconventional loads with exceptional voltage, current, impulse energy, and continuous power dissipation capability. This paper presents the design and construction of a reconfigurable resistive load with active temperature monitoring for the evaluation of ultra-high voltage pulsed power modulators and semiconductor devices. The load consists of a network of 15 ceramic resistors (outer diameter of 2.54 cm and length of 30.48 cm) mounted vertically in an oil filled aluminum tank. To enable exceptionally high-power dissipation, the oil is pumped through the tank and through a radiator. A microcontroller based module activates a fan on the radiator if a preset oil temperature is surpassed. Experimental results gathered demonstrate that the load withstood 10 kW at 10 kV for 30 minutes, and that the temperature of the oil reached 80 °C.
{"title":"Reconfigurable High Voltage Load for Pulsed Power Applications","authors":"M. Kim, J. Forbes, A. Bilbao, J. Schrock, S. Bayne","doi":"10.1109/PPC.2017.8291207","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291207","url":null,"abstract":"The evaluation of pulsed power systems and their constituent components requires unconventional loads with exceptional voltage, current, impulse energy, and continuous power dissipation capability. This paper presents the design and construction of a reconfigurable resistive load with active temperature monitoring for the evaluation of ultra-high voltage pulsed power modulators and semiconductor devices. The load consists of a network of 15 ceramic resistors (outer diameter of 2.54 cm and length of 30.48 cm) mounted vertically in an oil filled aluminum tank. To enable exceptionally high-power dissipation, the oil is pumped through the tank and through a radiator. A microcontroller based module activates a fan on the radiator if a preset oil temperature is surpassed. Experimental results gathered demonstrate that the load withstood 10 kW at 10 kV for 30 minutes, and that the temperature of the oil reached 80 °C.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"233 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129565907","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 : 2017-06-01DOI: 10.1109/ppc.2017.8291098
B. Fridman, K. Lobanov, D. G. Scherbakov, A. Firsov
The diffusion of pulse magnetic field into metal of a toroidal magnetic core made by winding of a transformer steel strap is considered. The 1-D numerical model was developed which take into account the viscous-type dynamic losses of magnetization, as well as the eddy currents. The processes of magnetic field propagation in the strap at switch-on the transformer to the voltage source have been analyzed. The results of the experiments confirming the obtained results are presented.
{"title":"Skin effect with pulse magnetization of strap toroidal magnetic core","authors":"B. Fridman, K. Lobanov, D. G. Scherbakov, A. Firsov","doi":"10.1109/ppc.2017.8291098","DOIUrl":"https://doi.org/10.1109/ppc.2017.8291098","url":null,"abstract":"The diffusion of pulse magnetic field into metal of a toroidal magnetic core made by winding of a transformer steel strap is considered. The 1-D numerical model was developed which take into account the viscous-type dynamic losses of magnetization, as well as the eddy currents. The processes of magnetic field propagation in the strap at switch-on the transformer to the voltage source have been analyzed. The results of the experiments confirming the obtained results are presented.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128525081","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 : 2017-06-01DOI: 10.1109/PPC.2017.8291199
Z. Li, X. Yu, R. Ban
The inductors in an Inductive Pulse Power Supply (IPPS) may face with different charging or discharging paths, which may cause the changes of inductors' inductances and resistances. This paper uses experiment method to solve this problem. First, we take inductors to do under-damped oscillations with different pre-charged capacitors, and then measure the changing voltages of the capacitors. Under the conditions that the capacitances are known, the inductances and resistances can be obtained by fitting the voltages values with the under-damped oscillations function curves. Furthermore, the changing rules of the inductances and resistances with frequencies can be obtained, which may make the simulation of IPPS system more accurate. An application using the experiment results confirms the improvements of simulation accuracies.
{"title":"The changes of inductors' inductances and resistances in inductive pulse power supply","authors":"Z. Li, X. Yu, R. Ban","doi":"10.1109/PPC.2017.8291199","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291199","url":null,"abstract":"The inductors in an Inductive Pulse Power Supply (IPPS) may face with different charging or discharging paths, which may cause the changes of inductors' inductances and resistances. This paper uses experiment method to solve this problem. First, we take inductors to do under-damped oscillations with different pre-charged capacitors, and then measure the changing voltages of the capacitors. Under the conditions that the capacitances are known, the inductances and resistances can be obtained by fitting the voltages values with the under-damped oscillations function curves. Furthermore, the changing rules of the inductances and resistances with frequencies can be obtained, which may make the simulation of IPPS system more accurate. An application using the experiment results confirms the improvements of simulation accuracies.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128636762","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 : 2017-06-01DOI: 10.1109/PPC.2017.8291201
V. Peplov, B. Han, R. Saethre, M. Stockli
The Spallation Neutron Source (SNS) beam chopping system uses a segmented electrostatic lens in the Low Energy Beam Transport (LEBT) line to deflect the beam out of the Radio Frequency Quadrupole (RFQ) input aperture to create gaps in the 1 ms beam macro-pulse for extraction from the Ring, or fully displace the beam. The lens is split azimuthally into four quadrants which are pulsed independently by four bipolar high voltage pulse generators. The chopper timing control system creates trigger pulses to the pulse generators which deflect the beam sequentially to four positions on the chopper target. In the present chopper configuration, all four segments are powered simultaneously with a 1 MHz burst repetition rate within the macro-pulse. To improve chopping performance, faster switches and higher voltages are required. An alternative chopping system configuration which can meet this request has been proposed, where only two opposite segments are used at a time. This will facilitate pulse generator performance by reducing switching frequency and power dissipation in the high voltage switches while operating at increased voltages, and make beam deflection more effective, stable and reliable. The new chopping configuration requires changes in the LEBT timing control patterns, upgrading the pulse generator, and changing the azimuthal position of the lens segments in the LEBT structure. This paper will review the timing control patterns for present and suggested configurations, compare the pulse generator performance for both cases, and show the advantages of the new chopping modes. The results of the simulated beam distribution at the RFQ input for different deflecting voltages will also be presented.
{"title":"Alternative configuration and timing control for beam chopping system at the SNS linac","authors":"V. Peplov, B. Han, R. Saethre, M. Stockli","doi":"10.1109/PPC.2017.8291201","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291201","url":null,"abstract":"The Spallation Neutron Source (SNS) beam chopping system uses a segmented electrostatic lens in the Low Energy Beam Transport (LEBT) line to deflect the beam out of the Radio Frequency Quadrupole (RFQ) input aperture to create gaps in the 1 ms beam macro-pulse for extraction from the Ring, or fully displace the beam. The lens is split azimuthally into four quadrants which are pulsed independently by four bipolar high voltage pulse generators. The chopper timing control system creates trigger pulses to the pulse generators which deflect the beam sequentially to four positions on the chopper target. In the present chopper configuration, all four segments are powered simultaneously with a 1 MHz burst repetition rate within the macro-pulse. To improve chopping performance, faster switches and higher voltages are required. An alternative chopping system configuration which can meet this request has been proposed, where only two opposite segments are used at a time. This will facilitate pulse generator performance by reducing switching frequency and power dissipation in the high voltage switches while operating at increased voltages, and make beam deflection more effective, stable and reliable. The new chopping configuration requires changes in the LEBT timing control patterns, upgrading the pulse generator, and changing the azimuthal position of the lens segments in the LEBT structure. This paper will review the timing control patterns for present and suggested configurations, compare the pulse generator performance for both cases, and show the advantages of the new chopping modes. The results of the simulated beam distribution at the RFQ input for different deflecting voltages will also be presented.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125086684","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 : 2017-06-01DOI: 10.1109/PPC.2017.8291335
A. Akimov, A. Akhmetov, P. Bak, A. Baydak, A. Chernitza, M. Egorychev, L. Fedorova, A. Eliseev, S. Khrenkov, Ya. V. Kulenko, A. Ottmar, A. Pachkov, A. Panov, O. Pavlov, D. Petrov, K. Zhivankov
A pulsed system for a 2 kA, 20 MeV linear induction accelerator power supply was developed. On a first stage of operation it is capable of producing a 336 kV, 2 kA, 60 ns single pulse at the accelerating inductive cells. Each cell is supplied by 8 pulse modulators based on an inductive voltage adder principle. Each modulator is designed to produce pulses up to 21 kV, 10 kA with a different flattop duration of 60 or 380 ns, also it can be used in a triple pulse mode operation with a time shift between pulses which can be set from 2 to 10 μs. The modulator's single and triple pulse mode as well as the auxiliary charging and biasing systems test results are presented. Also the pseudospark switches batch testing is described.
{"title":"Single — Triple pulse power supply for 2 KA, 20 MeV linear induction accelerator","authors":"A. Akimov, A. Akhmetov, P. Bak, A. Baydak, A. Chernitza, M. Egorychev, L. Fedorova, A. Eliseev, S. Khrenkov, Ya. V. Kulenko, A. Ottmar, A. Pachkov, A. Panov, O. Pavlov, D. Petrov, K. Zhivankov","doi":"10.1109/PPC.2017.8291335","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291335","url":null,"abstract":"A pulsed system for a 2 kA, 20 MeV linear induction accelerator power supply was developed. On a first stage of operation it is capable of producing a 336 kV, 2 kA, 60 ns single pulse at the accelerating inductive cells. Each cell is supplied by 8 pulse modulators based on an inductive voltage adder principle. Each modulator is designed to produce pulses up to 21 kV, 10 kA with a different flattop duration of 60 or 380 ns, also it can be used in a triple pulse mode operation with a time shift between pulses which can be set from 2 to 10 μs. The modulator's single and triple pulse mode as well as the auxiliary charging and biasing systems test results are presented. Also the pseudospark switches batch testing is described.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115999169","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 : 2017-06-01DOI: 10.1109/PPC.2017.8291164
F. Song, X. Jin, F. Li, B. Z. Zhang, G. P. Wang, C. Li, Y. Gan, H. Gong
We report on the design of a compact and repetitive pulsed e-beam source. This pulsed e-beam source, which can work stably for long time, was built based on Marx technology. The designed output voltage, current, pulse width and repetition frequency of this e-beam source is 1 MV, 20 kA, 180 ns and 1∼50 Hz, respectively. In contrast, the volume and weight of this source is limited to 2.5 m3 and 2.2 ton. The energy density of a pulse forming network model in this source attains 23 kJm−3. When working at single shots, this e-beam source gives an output voltage of 0.98 MV, current of 19.6 kA and power of approximate 19.2 GW. On the other hand, this e-beam source realizes an output voltage of 0.9 MV, current 18 kA and power 16.2 GW at a repetition frequency of 30 Hz. The source works very stable, with a jitter of 6 ns.
{"title":"Design of compact and repetitive pulsed e-beam source","authors":"F. Song, X. Jin, F. Li, B. Z. Zhang, G. P. Wang, C. Li, Y. Gan, H. Gong","doi":"10.1109/PPC.2017.8291164","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291164","url":null,"abstract":"We report on the design of a compact and repetitive pulsed e-beam source. This pulsed e-beam source, which can work stably for long time, was built based on Marx technology. The designed output voltage, current, pulse width and repetition frequency of this e-beam source is 1 MV, 20 kA, 180 ns and 1∼50 Hz, respectively. In contrast, the volume and weight of this source is limited to 2.5 m3 and 2.2 ton. The energy density of a pulse forming network model in this source attains 23 kJm−3. When working at single shots, this e-beam source gives an output voltage of 0.98 MV, current of 19.6 kA and power of approximate 19.2 GW. On the other hand, this e-beam source realizes an output voltage of 0.9 MV, current 18 kA and power 16.2 GW at a repetition frequency of 30 Hz. The source works very stable, with a jitter of 6 ns.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126408859","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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