IGNITOR

Ignitor is the Italian name for a planned tokamak device, developed by ENEA. As of 2022, the device has not been constructed.

IGNITOR
Ignitor
Device typeTokamak
LocationTroitsk, Russia
AffiliationENEA
Technical specifications
Major radius1.32 m
Minor radius0.47 m × 0.86 m
Plasma volume10 m3
Magnetic field13 T
Heating power12.8 MW
Fusion power100 MW
Discharge duration4 s
Plasma current11 MA
Plasma temperature122×106 K

Started in 1977 by Prof. Bruno Coppi at MIT, Ignitor based on the 1970s Alcator machine at MIT which pioneered the high magnetic field approach to plasma magnetic confinement, continued with the Alcator C/C-Mod at MIT and the FT/FTU series of experiments.[1] It was initially proposed to be built "in the area of the former Caorso nuclear power station". The currently intended location is at Troitsk near Moscow.[2]

Ignitor is designed to produce approximately 100 MW of fusion power despite its relatively small size. For comparison, the intended weight is 500 metric tons, while the ITER international reactor, expected to be the first tokamak to reach scientific breakeven, is some 19,000 tons.

2010

At a meeting with the scientific attachés of the European embassies in Moscow in early February 2010, Mikhail Kovalchuk, Director of the Kurchatov Institute, announced that an initiative aimed at developing a fast paced joint research programme in nuclear fusion research was strongly supported by the Governments of Russia and Italy.[3]

The original proposal had been initiated earlier by Evgeny Velikhov (President of the Kurchatov Institute) and Bruno Coppi (Head of the High Energy Plasmas Undertaking, MIT) during the early developments of the Alcator C-Mod programme at MIT, where well known scientists of the Kurchatov Institute made key contributions to experiments that identified the unique confinement and purity properties of the high density plasmas produced by the high field Alcator machine. In effects this investigated, for the first time, physical processes leading to attain self-sustained fusion burning plasmas.

The collaboration with the Kurchatov Institute is directed at the construction of the Ignitor machine, the first experiment proposed to achieve ignition conditions by nuclear fusion reactions on the basis of existing knowledge of plasma physics and available technologies. Ignitor is part of the line of research on high magnetic field, experiments producing high density plasmas that began with the Alcator and the Frascati Torus programmes at MIT and in Italy, respectively. Coppi claimed that IGNITOR would be a bigger step towards fusion power than the international ITER project, but several fusion scientists contested this in 2010.[4]

According to existing plans, Ignitor will be installed at the Triniti site at Troitsk near Moscow, that has facilities which can be upgraded to house and operate the machine. This site will become open and made to be easily accessible to scientists of all nations. The management of the relevant research programme will involve Italy and Russia only to facilitate the success of the enterprise. The proponents have suggested that the US become an Associate Member of this effort with a similar arrangement to that made with CERN for its participation in the LHC (Large Hadron Collider) Programme.

The goal to produce meaningful fusion reactors in a reasonable time leads to pursuing the achievement of ignition conditions in the near term in order to understand the plasma physical regimes needed for a net power producing reactor. In addition, an objective other than ignition that can be envisioned for the relatively near term is that of high flux neutron sources for material testing involving compact, high density fusion machines. This has been one of the incentives that have led the Ignitor Project to adopt magnesium diboride (MgB2) superconducting cables in the machine design, a first in fusion research. Accordingly, the largest coils (about 5m diameter) of the machine will be made entirely of MgB2 cables.

In the context of the Italy-Russia summit meeting held in Milan on 26 April 2010[5] the agreement to proceed with the proposed joint Ignitor programme has been signed. The participants, from the Russian side, have included the Prime Minister Vladimir Putin, the Deputy Prime Minister Igor Sechin, the Energy Minister Sergei Shmatko, and the Vice Minister of Education and Research Sergey Mazurenko. Participants from the Italian side have included Prime Minister Silvio Berlusconi, the Foreign Affairs Advisor to the Prime Minister Valentino Valentini (who had a key role in forging the agreement on the Ignitor programme), and the Minister of Education and Research Mariastella Gelmini who, together with Sergey Mazurenko, signed the agreement in the presence of the two Prime Ministers.[1][6]

After 2010

In 2013, new developments and issues for the Ignitor experiment were published.[7] The Ignitor project Conceptual Design Report was prepared by a joint Russian-Italian working group in 2015.[8] A 2015 study reports the advances made in different areas of the physics and technology that are relevant to the Ignitor project.[9] A safety analysis study for Ignitor at the TRINITI site was published in 2017.[2] A risks analysis of the project realization phase was published in 2017.[10] An informal exchange meeting took place in 2017.[11] The fuel cycle concept was presented in 2020.[12][13] In 2022 the field-coil design was revised.[14]

Progress on construction

Some full-size prototype components have been built in Italy.[15] As of 2018, construction of Ignitor in Russia has not commenced.[16]

See also

References
  1. Dati Camera dei Deputati. Jan 2009 Italian ministerial reply
  2. Bombarda, F.; Candido, L.; Coppi, B.; Gostev, A.; Khripunov, V.; Subbotin, M.; Testoni, R.; Zucchetti, M. (November 2017). "Ignitor siting at the TRINITI site in Russian Federation". Fusion Engineering and Design. 123: 192–195. doi:10.1016/j.fusengdes.2017.02.011. ISSN 0920-3796.
  3. Robert Arnoux (2010-05-14). "Italy and Russia revive Ignitor". ITER newsline. p. 169.
  4. Feresin, Emiliano (2010). "Fusion reactor aims to rival ITER". Nature. doi:10.1038/news.2010.214.
  5. "Il Legno storto, quotidiano online - Politica, Attualità, Cultura - Accordo Italia Russia per la realizzazione del progetto Ignitor del Prof. Bruno Coppi". Archived from the original on 2011-07-13. Retrieved 2010-07-01.
  6. Nuclear power in Italy, Berlusconi:"Start work within three years"
  7. Coppi, B.; et al. (26 September 2013). "New developments, plasma physics regimes and issues for the Ignitor experiment". Nuclear Fusion. 53 (10): 104013. Bibcode:2013NucFu..53j4013C. doi:10.1088/0029-5515/53/10/104013. eISSN 1741-4326. ISSN 0029-5515. S2CID 120764120.
  8. Perevezentsev, A. N.; Rozenkevich, M. B.; Subbotin, M. L. (2019-11-15). "Concept of the Fuel Cycle of the IGNITOR Tokamak". Physics of Atomic Nuclei. 82 (7): 1055–1059. doi:10.1134/S1063778819070093. S2CID 213278019.
  9. Coppi, B.; et al. (16 April 2015). "Perspectives for the high field approach in fusion research and advances within the Ignitor Program". Nuclear Fusion. 55 (5): 053011. Bibcode:2015NucFu..55e3011C. doi:10.1088/0029-5515/55/5/053011. eISSN 1741-4326. ISSN 0029-5515. S2CID 119512970.
  10. Subbotin, Mikhail; Bianchi, Aldo; Bombarda, Francesca; Kravchuk, Vladimir; Nappi, Eugenio; Spigo, Giancarlo (November 2017). "Preliminary risks analysis of the IGNITOR Project realization phase". Fusion Engineering and Design. 124: 1246–1250. doi:10.1016/j.fusengdes.2017.02.099. ISSN 0920-3796.
  11. The Russian-Italian Ignitor Tokamak Project: Design and status of implementation (2017)
  12. Perevezentsev, A. N.; Rozenkevich, M. B.; Subbotin, M. L. (December 2019). "Concept of the Fuel Cycle of the IGNITOR Tokamak". Physics of Atomic Nuclei. 82 (7): 1055–1059. doi:10.1134/S1063778819070093. eISSN 1562-692X. ISSN 1063-7788. S2CID 213278019.
  13. Rozenkevich, M.; Perevezentsev, A.; Subbotin, M.; Candido, L.; Testoni, R.; Zucchetti, M. (November 2020). "Optimisation of fuel cycle for IGNITOR tokamak at TRINITI in Russia: A critical review". International Journal of Hydrogen Energy. 45 (56): 32311–32319. doi:10.1016/j.ijhydene.2020.08.268. ISSN 0360-3199. S2CID 224954668.
  14. Mitrishkin, Y.V.; Korenev, P.S.; Konkov, A.E.; Kartsev, N.M.; Smirnov, I.S. (January 2022). "New horizontal and vertical field coils with optimised location for robust decentralized plasma position control in the IGNITOR tokamak". Fusion Engineering and Design. 174: 112993. doi:10.1016/j.fusengdes.2021.112993. ISSN 0920-3796. S2CID 245591369.
  15. Fact sheet (by MIT, pre-2014)
  16. Mikhail, Subbotin Leonidovich; Gostev, Alexander; Anashkin, Igor; Belov, Alexander; Levin, Igor (2019). "Status and tasks of TRINITI site infrastructure modernization for the Ignitor project". Fusion Engineering and Design. 146: 866–869. doi:10.1016/j.fusengdes.2019.01.101. ISSN 0920-3796. S2CID 126603670.
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