Shaping the output pulse of a linear-transformer-driver module

Stygar, W. A.; Fowler, William; LeChien, K. R.; Long, F. W.; Mazarakis, M.G.; McKee, G. R.; McKenney, J. L.; Porter, J. L.; Savage, M. E.; Stoltzfus, Brian; Valde, D. M. Van De; Woodworth, J. R.

doi:10.1103/physrevstab.12.030402

Cited by 51 publications

(31 citation statements)

References 35 publications

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“…5(b) is applicable, the peak value of the electrical power delivered by the IMG to a load with impedance Z load is maximized when Z and Z load satisfy the following relations [6,7]: (17)- (22) are satisfied, the IMG is impedance matched to its load; i.e., the peak electrical power delivered by the IMG to the load is maximized. (We do not address here the pulse-shaping technique of Ref.…”

Section: Circuit Model Of the 105-tw Imgmentioning

confidence: 99%

“…The quantity R c is the effective series resistance of a single LTD cavity, L c is the effective series cavity inductance, C c is the series cavity capacitance, R cores is the effective parallel resistance within a single cavity due to its ferromagnetic cores, Z is the impedance of the first transmission-line segment, Z load is the load impedance, τ is the one-way electromagnetic transit time of a single segment, R b is the effective series resistance of a single brick, n b is the number of bricks per cavity, L b is the effective series brick inductance, and C b is the series brick capacitance. The quantity Z c is the effective impedance of a single cavity; the expression given by the figure for Z c is valid when R cores ≫ ½1.1ðL c =C c Þ 1=2 þ 0.8R c [7]. (b) When each cavity is triggered at time τ after the cavity immediately upstream is triggered, the circuit of (a) can be simplified as that given by (b).…”

Section: Introductionmentioning

confidence: 99%

“…The quantity R LTD is the effective series resistance of the LTD module, L LTD is the effective series module inductance, C LTD is the series module capacitance, and R shunt is the effective shunt resistance of the module due to its cores. The quantity Z LTD is the effective impedance of the ten-cavity LTD module; the expression given by the figure for Z LTD is valid when R shunt ≫ ½1.1ðL LTD =C LTD Þ 1=2 þ 0.8R LTD [7]. When circuit (b) is applicable and the values of Z and Z load are as given by the figure, the LTD module is impedance matched to the load; i.e., the peak electrical power delivered by the module to the load is maximized.…”

Section: Introductionmentioning

confidence: 99%

“…A linear-transformer-driver (LTD) module is an induction voltage adder that is powered by circuits located within the cavities of the adder [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Since an LTD module can be designed to provide single-stage electrical-pulse compression and impedance matching, such modules are attractive candidates as prime-power sources for nextgeneration pulsed-power accelerators .…”

Section: Introductionmentioning

confidence: 99%

“…For each cavity, Fig. 3 models the cores as a resistive circuit element with resistance R cores located at the cavity output [7,13,[15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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Impedance-matched Marx generators

Stygar

LeChien

Mazarakis

et al. 2017

Phys. Rev. Accel. Beams

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We have conceived a new class of prime-power sources for pulsed-power accelerators: impedancematched Marx generators (IMGs). The fundamental building block of an IMG is a brick, which consists of two capacitors connected electrically in series with a single switch. An IMG comprises a single stage or several stages distributed axially and connected in series. Each stage is powered by a single brick or several bricks distributed azimuthally within the stage and connected in parallel. The stages of a multistage IMG drive an impedance-matched coaxial transmission line with a conical center conductor. When the stages are triggered sequentially to launch a coherent traveling wave along the coaxial line, the IMG achieves electromagnetic-power amplification by triggered emission of radiation. Hence a multistage IMG is a pulsed-power analogue of a laser. To illustrate the IMG approach to prime power, we have developed conceptual designs of two ten-stage IMGs with LC time constants on the order of 100 ns. One design includes 20 bricks per stage, and delivers a peak electrical power of 1.05 TW to a matched-impedance 1.22-Ω load. The design generates 113 kV per stage and has a maximum energy efficiency of 89%. The other design includes a single brick per stage, delivers 68 GW to a matched-impedance 19-Ω load, generates 113 kV per stage, and has a maximum energy efficiency of 90%. For a given electrical-poweroutput time history, an IMG is less expensive and slightly more efficient than a linear transformer driver, since an IMG does not use ferromagnetic cores.

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Section: Circuit Model Of the 105-tw Imgmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…For each cavity, Fig. 3 models the cores as a resistive circuit element with resistance R cores located at the cavity output [7,13,[15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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