From the IAEA archives: a retrospective of nuclear fusion research

Since the early days of its inception, in 1957, the IAEA has supported nuclear fusion research. At the second United Nations Conference on the “Peaceful Uses of Atomic Energy” in Geneva in 1958, discussion on nuclear fusion led to the newly created IAEA being entrusted with the responsibility to lead the global collaboration. Six decades later the IAEA remains the natural home for fostering international collaboration in fusion research and development through facilitating exchange of scientific and technical information. Supported by the dedicated community of fusion researchers in the Member States, the Nuclear Fusion journal was set up in 1960 by the IAEA to disseminate knowledge in this niche area of science. Today the journal is considered the main source of information about advances in nuclear fusion. Since 1961 the IAEA has also been organizing ‘Fusion Energy Conferences’ (initially named Conference on Plasma Physics and Controlled Nuclear Fusion Research) to enable the dedicated fusion research professionals to periodically discuss developments and achievements. The impetus for the establishment of the international organization for fusion energy, ITER (International Thermonuclear Experimental Reactor) in 2007, came from discussions in IAEA fora that covered several initiatives for collaboration on an international fusion facility. The IAEA Director General is the depository of the ITER Agreement.

All images are from the IAEA Archives.

Read this Nature Physics article to find out more about the history of fusion research.

Scylla experiment was the first to show that deuterium gas can be heated to 10,000,000 degrees in the laboratory and confined by magnetic fields. 
Experiment initiated in 1957.
(IAEA Archives/Credit: Courtesy of the Los Alamos National Laboratory’s National Security Research Center, USA)Scylla condenser bank during construction at the Los Alamos Scientific Laboratory.
(IAEA Archives/Credit: Courtesy of the Los Alamos National Laboratory’s National Security Research Center, USA)An engineer from Princeton University assembling the figure 8-shaped stellarator model at the US fusion exhibit in Geneva as part of the Second United Nations International Conference on the Peaceful Uses of Atomic Energy, Geneva, Switzerland, September 1958.
(IAEA Archives/Credit: UN Photo/Mark Garten)A view of the "ZETA" (Zero Energy Thermonuclear Assembly) fusion device which was operational between 1957 and 1968 at Harwell, United Kingdom. 
The transformer windings and the torus (or doughnut ring) can be seen. 
(IAEA Archives/Credit: UKAEA, United Kingdom)Preparation for the Conference on Plasma Physics and Controlled Nuclear Fusion Research, the first edition of the Fusion Energy Conferences at the Europahaus in Salzburg, Austria, September 1961. 
(IAEA Archives/Credit: Photo Ellinger) Conference staff is being given instructions, while the big letters for the stage decorations are visible on the table. 
(IAEA Archives/Credit: Photo Ellinger)Men preparing the stage for the conference. 
One of them is holding a giant mock-up of an atom. 
(IAEA Archives/Credit: Photo Ellinger)Professor Dr. T. Yasaki (Yamanashi University, Japan) in front of the entrance of the Europahaus. 
(IAEA Archives/Credit: Photo Ellinger)View of the podium during the opening session of the first Fusion Energy Conference at the Europahaus in Salzburg, Austria, 4 September 1961. 
L.t.r.: Bronislaw Buras, Bechir Torki, Evgueni Piskarev, Claude Etievant, Arkady Rylov, Hans Lechner, Sterling Cole (IAEA Director General, 1957-1961), Alfred Baeck, Bernhard Gross, Philip Davenport, Wilhelm Gauster and Witold Lisowski. 
(IAEA Archives/Credit: Photo Ellinger)L.t.r.: Witold Lisowski (IAEA Executive Secretary of the conference), Evgueni Piskarev (Scientific Secretary, Institute of Atomic Energy, Russia), Bronislaw Buras (IAEA Coordinating Scientific Secretary) and Claude Etievant (Scientific Secretary, CEA, France) during an informal conversation, seen in front of a window with view to Festung Hohensalzburg at the Europahaus in Salzburg, Austria, September 1961. 
(IAEA Archives/Credit: Photo Ellinger)Participants during informal conversation somewhere outside the conference room. Lyman Spitzer, inventor of the stellarator device, can be seen crossing the room holding a book.
(IAEA Archives/Credit: Photo Ellinger)Boy holding a sign, saying: "Mr. PALUMBO to the Registration please! URGENT!". 
Mr. Palumbo was the EURATOM representative to the conference. 
(IAEA Archives/Credit: Photo Ellinger)Woman on the phone somewhere outside the conference room. 
(IAEA Archives/Credit: Photo Ellinger)Four participants (maybe also staff members) during the panel inside the conference room. 
(IAEA Archives/Credit: Photo Ellinger)Two men between the pigeon holes and a large pile of papers for the conference. 
(IAEA Archives/Credit: Photo Ellinger)(IAEA Archives/Credit: Rosatom State Nuclear Energy Corporation, Russia)Some of the 280 delegates at the opening of the 2nd Fusion Energy Conference in the Culham Lecture Theatre at Culham Laboratory, United Kingdom, 6 September 1965. 
(IAEA Archives/Credit: UKAEA, United Kingdom)The opening of the 2nd Fusion Energy Conference in Culham, United Kingdom, 6-10 September 1965, with Sir John Cockcroft, Master of Churchill College, welcoming the delegates. 
Delegates from 26 countries fill the Culham Lecture Theatre. 
(IAEA Archives/Credit: UKAEA, United Kingdom)Some of the 280 delegates at the opening of the conference in the Culham Lecture Theatre at Culham Laboratory, United Kingdom, 6 September 1965. 
(IAEA Archives/Credit: UKAEA, United Kingdom)Henry Seligman, IAEA Deputy Director General, opening the 2nd Fusion Energy Conference in the Culham Lecture Theatre at Culham Laboratory, United Kingdom, 6 September 1965. 
Beyond him, John Cockcroft, 1951 Nobel Prize winner in Physics; John B. Adams, Director of Culham Laboratory; and Hannes O.G. Alfven, 1970 Nobel Prize winner in Physics. 
(IAEA Archives/Credit: UKAEA, United Kingdom)John B. Adams, Director of Culham Laboratory, speaking at the opening of the conference; (right) Sir John Cockcroft, Master of Churchill College, and Henry Seligman, IAEA Deputy Director General. 
(IAEA Archives/Credit: UKAEA, United Kingdom)(IAEA Archives/Credit: IAEA)Technicians at work on the 2X device.
(IAEA Archives/Credit: Photo: USAEC/San Francisco, Operations Office, USA)Technicians at work on the ASTRON device.
(IAEA Archives/Credit: Photo: USAEC/San Francisco, Operations Office, USA)Technician at the beam entry end of ASTRON.
(IAEA Archives/Credit: Photo: USAEC/San Francisco, Operations Office, USA)The toroidal shape of the Levitron, one of a series of devices used in the study of the properties of plasma for fusion research. 
(IAEA Archives/Credit: Photo: USAEC/San Francisco, Operations Office, USA)After extensive studies of toroidal magnetic configurations for obtaining controlled thermonuclear reactions, a toroidal machine was built at the Lawrence Laboratory, which combined some the features of a stellarator with those of Levitron, such as high-shear stellarator-type coils and a single loop-coil in the plane of the torus located outside of the plasma confinement space. 
(IAEA Archives/Credit: Photo: USAEC/San Francisco, Operations Office, USA)In this experiment, the magnetic trap was formed by currents flowing in two coaxial coplanar rings. 
Plasma was injected into the trap iron from a plasma gun and its stability was studied.
A technician adjusting a diagnostic probe.

(IAEA Archives/Credit: UKAEA, United Kingdom)Technician at work on the ALICE device.
(IAEA Archives/Credit: Photo: USAEC/San Francisco, Operations Office, USA)Technician at work at the fusion chamber port of ALICE.
(IAEA Archives/Credit: Photo: USAEC/San Francisco, Operations Office, USA)The interior of the Gulf General Atomic's (today General Atomics) direct current octupole plasma confinement device during final construction. 
The magnetic field was produced by current flowing in four rings — a technician is shown installing the innermost ring; the other three are indicated by arrows.
The device, housed in a tank 8 feet high, by 16 feet in diameter, provide large volume of magnetically confined plasma. 
(IAEA Archives/Credit: Photo: USAEC/San Francisco, Operations Office, USA)T-3 tokamak operated at Kurchatov Institute, Russia, between 1959 and 1970, and established the tokamak as a promising option for magnetic confinement. 
(IAEA Archives/Credit: Rosatom State Nuclear Energy Corporation, Russia)The T-4 tokamak was a development of the T-3 tokamak. 
(IAEA Archives/Credit: Rosatom State Nuclear Energy Corporation, Russia)The T-4 tokamak was a development of the T-3 tokamak. 
(IAEA Archives/Credit: Rosatom State Nuclear Energy Corporation, Russia)(IAEA Archives/Credit: Rosatom State Nuclear Energy Corporation, Russia)T-6 tokamak at Kurchatov Institute, Russia. 
(IAEA Archives/Credit: Rosatom State Nuclear Energy Corporation, Russia)The quartz discharge chamber is contained in the circular aluminium ring, with the many cables carrying the current required to energize the heating and confining magnetic fields.
(IAEA Archives/Credit: Courtesy of the Los Alamos National Laboratory’s National Security Research Center, USA)(IAEA Archives)
Optical observation of the annular discharge in the laboratory for fusion at Fontenay-aux-Roses, France.
(IAEA Archives)(IAEA Archives)Research on nuclear fusion carried out in the Jülich Research Centre. 
The picture shows a magnetic fusion device for plasma heating experiments.
(IAEA Archives/Credit: Forschungszentrum Jülich, Germany)Research on nuclear fusion carried out in the Jülich Research Centre. 
Aerial view of a magnetic fusion device for plasma heating experiments.
(IAEA Archives/Credit: Forschungszentrum Jülich, Germany)Research on nuclear fusion carried out in the Jülich Research Centre. 
The picture shows a dense plasma focus device used for studies on plasma physics and fusion reactor physics. 
(IAEA Archives/Credit: Forschungszentrum Jülich, Germany)MT-1 is a small-scale tokamak experimental device for the investigation of plasma behaviour. 
(IAEA Archives)HBTXI reversed field pinch device as installation nears completion, showing a copper ring which will the plasma during electrical testing.
HBTXI was started up in 1970.
(IAEA Archives/Credit: UKAEA, United Kingdom)(IAEA Archives/Credit: UKAEA, United Kingdom)(IAEA Archives/Credit: Rosatom State Nuclear Energy Corporation, Russia)The discharge tube had an inside diameter of 78 cm, a toroidal magnetic field of 5 Tesla and a discharge current of 0.8 million amperes. 
(IAEA Archives/Credit: Rosatom State Nuclear Energy Corporation, Russia)(IAEA Archives/Credit: Rosatom State Nuclear Energy Corporation, Russia)The DITE tokamak during final stages of construction at Culham Laboratory. 
The device was used for studies of the heating and confinement of high temperature plasma for fusion research. 
Two methods were used for heating the plasma confined in the toroidal vacuum chamber; first by passing a large current (200,000 Amps) through the plasma and secondly by the injection of energetic neutral atoms. 
The current, induced in the plasma by transformer action, also provided one of the confining magnetic fields; the second field was provided by a set of liquid nitrogen-cooled coils encircling the torus. 
The device was also be used to study the extraction of impurity atoms from the plasma using a magnetic divertor.
(IAEA Archives/Credit: UKAEA, United Kingdom)
Inspection of the large magnetic coils for the DITE tokamak at the Culham Laboratory. 
This device was used to study the confinement of high temperature plasma for fusion research.
(IAEA Archives/Credit: UKAEA, United Kingdom)General view of the CLEO device at Culham Laboratory in tokamak configuration.
Part of the control room and diagnostic area are shown in the foreground with the toroidal plasma confinement device in the background.
The CLEO team tested different magnetic fields configurations (i.e. tokamak, stellarator, reversed field pinch) on the same device to study and compare the plasma confinement properties of the various systems.
(IAEA Archives/Credit: UKAEA, United Kingdom)One of 24 magnetic coils being moved into position on the CLEO device at Culham Laboratory to produce a stellarator configuration.
The field from these coils with the field produced by currents flowing through the helical conductors around the torus (in the foreground) provides the confining magnetic field for high temperature plasma.
(IAEA Archives/Credit: UKAEA, United Kingdom)Side view of the CLEO machine.
(IAEA Archives/Credit: UKAEA, United Kingdom)A small high-beta tokamak experiment for studying plasmas with non-circular cross-sections.
(IAEA Archives/Credit: UKAEA, United Kingdom)View of the podium during the opening of the 7th Fusion Energy Conference in Innsbruck, Austria, 23 August 1978.
L.t.r.: C. De Mol (IAEA), J. Phillips (IAEA), R.S. Pease (United Kingdom), F. Prior (Austria), H. Kakihana (IAEA), R. Niescher (Austria), F. Cap (Austria), V.S. Vlasenkov (IAEA).
(IAEA Archives)Opening speech at conference in Innsbruck, Austria, 23 August 1978.
(IAEA Archives)Some of the over 500 delegates at the opening of the conference in Innsbruck, Austria, 23 August 1978.
(IAEA Archives)L.t.r.: H. Kakihana (IAEA Deputy Director General),  F. Prior (Austria representative), R. Niescher (Austria representative), F. Cap (Austria representative). 
(IAEA Archives)The FTU is a medium-size, high field tokamak built in the 1980s. 
(IAEA Archives/ Credit: ENEA, Italy)Ambassador Oleg Khlestov, Resident Representative of the former Soviet Union to the IAEA (right) shaking hands with Hans Blix, IAEA Director General (1981-1997), during the donation of the T-10 tokamak model.
T-10 tokamak was developed in the D.V. Efremov Research Institute for Electro-physical Apparatus under the scientific direction of the I.V. Kurchatov Institute for Nuclear Energy.
(IAEA Archives/Credit: IAEA)The START device was built in 1990. 
(IAEA Archives/ Credit: UKAEA, United Kingdom)JT-60 (Japan Torus-60) was a large tokamak operated by the Japan Atomic Energy Research Institute and by the Japan Atomic Energy Agency's Naka Fusion Institute in Japan between 1985 and 2010.
(IAEA Archives/Credit: JAERI, Japan)Inside view of the coils of Wendelstein 7-AS stellarator.
(IAEA Archives/Credit: Max-Planck-lnstitut fur Plasmaphysik, Germany)Internal view of the TORE SUPRA (today WEST), the first large tokamak to operate with a superconducting toroidal magnet vacuum chamber.  
On the inner side (in the centre picture) carbon tiles brazed on cooled stainless steel tubes act as a toroidal bumper limiter.  
On the outer side (L and R) one can see 2 ergodic divertor coils.
(IAEA Archives/Credit: CEA, France)L.t.r.: Ambassador Corrado Pirzio-Biroli (European Union), Nicolai S. Cheverev, Administrative Director of Fusion Programmes, Ministry of the Russian Federation of Atomic Energy, Hans Blix , IAEA Director General (1981-1997), Ambassador Kunisada Kume, Resident Representative of Japan to the IAEA and Ambassador John B. Ritch III, Resident Representative of the USA to the IAEA.
(IAEA Archives/Credit: IAEA)L.t.r.: Werner Burkart (IAEA Deputy Director General), Evgeny Velikhov (Chairperson of the ITER Council, Russia), Mohamed ElBaradei (IAEA Director General, 1997-2009), Masaji Yoshikawa (Chairperson of the ITER Management Advisory Committee, Japan), Din Dayal Sood (IAEA Director of the Division of Physical and Chemical Sciences).
(IAEA Archives/Credit: IAEA)
Last update: 29 July 2020

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