Plasma Heating and Confinement in GOL-3 Multi Mirror Trap

Burdakov, A. V.; Azhannikov, A.; Astrelin, V. T.; Beklemishev, A. D.; Burmasov, V. S.; Derevyankin, G. E.; Ivanenko, V.G.; Иванов, И. А.; Ivantsivsky, M. V.; Kandaurov, I. V.; Konyukhov, V. V.; Kotelnikov, I. A.; Kovenya, V. M.; Kozlinskaya, T.; Kuklin, K. N.; Кузнецов, А. А.; Kuznetsov, S. A.; Lotov, K. V.; Тимофеев, И. В.; Makarov, A. N.; Mekler, K. I.; Nikolaev, V. S.; Попов, С. С.; Поступаев, В. В.; Polosatkin, S. V.; Rovenskikh, A. F.; Shoshin, A. A.; Shvab, I.; Sinitsky, S. L.; Sulyaev, Yu. S.; Степанов, В. Д.; Trunyov, Yu.; Vyacheslavov, L. N.; Zhukov, V. P.; Zubairov, E. R.

doi:10.13182/fst07-a1327

Cited by 51 publications

(15 citation statements)

References 5 publications

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“…We consider the parameter set typical of fusion-related experiments on plasma heating by a relativistic electron beam in mirror traps. [19][20][21][22] This example is interesting not only in the context of operating facilities, but also due to the discovered conflict between the exact results and earlier approximate models. According to the existing notion 14,15 which is based on the hydrodynamic approximation, the increase in the magnetic field results in monotonic decrease in oblique wave's growth rates: at low fields the oblique modes dominate, while at high fields the instability is almost one dimensional.…”

Section: Direct Computation Of the Growth Rate For The Instability Ofmentioning

confidence: 99%

Direct computation of the growth rate for the instability of a warm relativistic electron beam in a cold magnetized plasma

2009

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The fully kinetic, fully electromagnetic dispersion equation for a warm relativistic electron beam in a cold magnetized plasma is numerically solved with no simplifying assumptions made. For magnetic fields of various strengths, the growth rate maps for the beam-plasma instability are plotted and dominant modes are identified. The exact solution is compared with available approximate solutions. The latter are shown to misinterpret the effect of the magnetic field on the instability of oblique waves.

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Section: Direct Computation Of the Growth Rate For The Instability Ofmentioning

confidence: 99%

Direct computation of the growth rate for the instability of a warm relativistic electron beam in a cold magnetized plasma

2009

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“…2013; Bagryansky, Beklemishev & Postupaev 2019). The efficiency of the multiple-mirror confinement was demonstrated in GOL-3 experiments with sub-fusion plasma (Burdakov 2007; Burdakov & Postupaev 2018). A combination of a central gasdynamic confinement core with two side multiple-mirror sections will be studied in GOL-NB experiments (see Postupaev et al.…”

Section: Introductionmentioning

confidence: 98%

“…Recent visions of a new generation mirror confinement system reckon for a special multiple-mirror magnetic sections for this purpose (Beklemishev et al 2013;Bagryansky, Beklemishev & Postupaev 2019). The efficiency of the multiple-mirror confinement was demonstrated in GOL-3 experiments with sub-fusion plasma (Burdakov 2007;Burdakov & Postupaev 2018). A combination of a central gasdynamic confinement core with two side multiple-mirror sections will be studied in GOL-NB experiments (see Postupaev et al 2016aPostupaev et al , 2020.…”

Section: Introductionmentioning

confidence: 99%

Preliminary experimental scaling of the helical mirror confinement effectiveness

et al. 2020

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The paper presents experimental results from the SMOLA device that is the first facility with a helical mirror section of the magnetic field. This device is built in the Budker Institute of Nuclear Physics for the verification of the helical mirror confinement idea that is the recently introduced technique of the active control of axial losses from a confinement zone. Theory predicts that with rotating plasma, a helical mirror will provide suppression of the axial plasma flow and, simultaneously, density pinching to the axis. Experiments demonstrated that plasma density at the exit from the transport section is suppressed with activation of the helical field, the effect is significant and highly reproducible. The most pronounced effect is observed on the plasma periphery, where the mirror ratio is the highest. The integral suppression ratio reaches 2–2.5 in the discussed experiments. Experimental results are compared with simplified theoretical estimates. The integral suppression ratio matches the simple theoretical estimates even if the transversal diffusion is neglected.

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“…Recent achievements of quasistationary high relative pressure and high performance regimes in open magnetic systems (Burdakov et al 2007;Bagryansky et al 2015;Gota et al 2019) have boosted activities on the development of a next-step linear device with a fusion-grade plasma. This challenge is feasible if the device incorporates the best known and emerging physics and technologies (Bagryansky, Beklemishev & Postupaev 2019).…”

Section: Introductionmentioning

confidence: 99%

Plasma flow suppression by the linear helical mirror system

et al. 2022

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The paper presents experimental results from the SMOLA device that is the first facility with a helical mirror section of the magnetic system. This device was built in the Budker Institute of Nuclear Physics for the verification of the helical mirror confinement idea that is the technique of an active control of axial losses from a confinement zone. Theory predicts that, with rotating plasma, a helical mirror will provide suppression of the axial plasma flow and, simultaneously, density pinching to the axis. Experiments demonstrated the increase in plasma density in the entrance trap by a factor of 1.6 in the helical configuration. The integral axial flux from the transport section drops severalfold. The effective mirror ratio of the helical section was $R_{eff} > 10$ . Particle flux returning by the helical mirror section towards the confinement zone was observed. At high corrugation ratios, the axial flux direction is different at the magnetic axis and in the periphery of the plasma in the helical section. All axial fluxes scale linearly with the plasma density, even if the ion mean free path is comparable to the total length of the helical section. Good agreement of the experimental results with theoretical predictions is found.

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Plasma Heating and Confinement in GOL-3 Multi Mirror Trap

Cited by 51 publications

References 5 publications

Direct computation of the growth rate for the instability of a warm relativistic electron beam in a cold magnetized plasma

Direct computation of the growth rate for the instability of a warm relativistic electron beam in a cold magnetized plasma

Preliminary experimental scaling of the helical mirror confinement effectiveness

Plasma flow suppression by the linear helical mirror system

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