GEMS ENGINEERING LTD.

GEMS ENGINEERING LTD.

is an engineering SME specialized for the R&D market and offering innovative engineering and managerial solutions for projects involving substantial amounts of human expertise. We are supplying solutions covering the whole development process: from conceptual through final designs up-to prototype manufacturing, testing and installation of the final product.

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Our projects

The ITER device, currently under construction in the south of France, will study the potential of controlled nuclear fusion to provide energy for mankind. In order to study the behaviour of this device, a set of monitoring systems (referred to as Diagnostics) is required. These Diagnostics will provide the information required to understand the performance of the device.

GEMS Engineering is deeply involved in and fully devoted to the success of the ITER project. As a result, our main projects are in connection with ITER, and - more closely - to its diagnostic systems.

Infrastructure development for ITER’s in-vessel diagnostic signal transmission

Divertor/In-vessel loom clamp
Divertor/In-vessel loom clamp
GEMS Engineering have concluded a number of contracts with ITER IO with the aim to contribute to the development of the in-vessel electrical infrastructure that is responsible for signal transmission of numerous plasma diagnostic systems. Items to develop include cable trays, cable looms, clamps, clips, connectors, etc. Activities delivered to ITER include design, finite element analysis, prototype and mock-up manufacturing and testing development of special tooling, etc.

Examples of some manufactured prototypes and mockups are below. GEMS engineers and manufacturing experts have gained, among others, plenty of valuable expertise during the manufacturing of these items in terms of manufacturing optimization (speed, optimum raw material usage, cost, and alike).

We have also tested these components for functionality, installability, assemblability, etc.

Latest news

Consortium members
4+2 years tender won for the supply of goods and services for ITER
[13 September 2021] A consortium formed by GEMS Engineering (Hungary), C3D Engineering (Hungary, leader) and Arkadia Technology (France) won a 4+2 years tender for the supply of goods and services for ITER via a Framework Contract titled Diagnostic Electrical Services Implementation.
[learn more about project]

Erosion Deposition Monitor (EDM)

Front end optics enclosure with Vertical Targets (IVT left, OVT right)
Front end optics enclosure with Vertical Targets (IVT left, OVT right)
GEMS, as the leader of the consortium composed of itself, C3D, Optimal Optik and AEMI has recently signed a Framework Contract with ITER IO. This 4+2 years Framework Contract targets the delivery of the mechanical design, analysis and prototyping of all components of the Erosion Deposition Monitor: the work affects the full system, from the in-vessel optics enclosure, which will be installed under the ITER Divertor dome, to the back end data collection system installed in the diagnostic hall. The goal of the Framework Contract is to progress the Erosion Deposition Monitor (EDM) design from its current state (post Conceptual Design Review, CDR);

  1. to the Preliminary Design Review, PDR, of the full system
  2. to the Final Design Review FDR, of the in-vessel and Port Cell (ISS and PCSS) components,
  3. deliver a set of prototype in-vessel components
  4. and deliver final manufactured in-vessel components ready for installation on ITER.

Latest news

Top section of the optical box under the divertor dome – a key component of the whole system. It will be fully exposed to harsh envirionment of the divertor casettes.
Top section of the optical box under the divertor dome – a key component of the whole system. It will be fully exposed to harsh envirionment of the divertor casettes.
The first Task Order implementing the tasks of the Framework Contract was launched.
[12 September 2021] It will last until November 2022 and will target the progress of the EDM design from its current state (post Conceptual Design Review, CDR) to the Preliminary Design Review, PDR state, the completion of the PDR and resolution of the Category 1 chits (most severe issues raised during the design review) if any.
[learn more about project]

ITER Hard X-Ray Monitor (HXRM) Development

Front end optics enclosure with Vertical Targets (IVT left, OVT right)
Our colleagues in the last 5 years have been working on the final design of the mechanical parts of the Hard X Ray Monitor which is a first plasma diagnostic system of the ITER machine, that will have a primary role in the detection and measurement of runaway electron events during the Hydrogen/Helium phase of the machine. The measurements will be analysed and used to improve the quality of subsequent plasma discharges to avoid/suppress the runaway electrons. The measurements will also be sent to the Plasma Control System and will be used to trigger the Disruption Mitigation Systems to prevent and/or stop runaway electron events.

Latest news

Top section of the optical box under the divertor dome – a key component of the whole system. It will be fully exposed to harsh envirionment of the divertor casettes.
Top section of the optical box under the divertor dome – a key component of the whole system. It will be fully exposed to harsh envirionment of the divertor casettes.
Project launched!
[29 August 2022] Further details are coming soon.
[learn more about project]

High-vacuum chamber for laser research applications

High-vacuum chamber for laser research applications
High-vacuum chamber for laser research applications

Upon the request and order of the University of Pecs, High-field Terahertz Research Laboratory, GEMS had designed and supplied a high-vacuum chamber to accomodate a target and various optical components to guide the beam of a terahertz laser.

Latest news

High-vacuum chamber for laser research applications
Components delivered!
[30 July 2022]
Delivery successfully accomplished.
[learn more about project]

Manufacturing and delivery of in-sleeve supports for 55.C4 + 55.G8 diagnostic subsytems

In-sleeve support for 55.C4 + 55.G8 diagnostic subsytems.
In-sleeve support for 55.C4 + 55.G8 diagnostic subsytems.

We have manufactured - according to strictest ITER requirements - two in-sleeve supports for 55.C4 + 55.G8 diagnostic subsytems. This included the construction of two stainless steel in-sleeve support structures for 55.C4 +55.G8 transmission lines. The transmission lines cross the Tokamak building external walls at B1 level. The support and the transmission lines are installed by inserting the support through the rectangular sleeve pre-installed in the open and back filled.

The transmission lines comprise four rectangular stainless steel pipes with 200x100mm section, running from tokamak to diagnostic building.

Latest news

Installed supports
Components installed!
[28 June 2022] After the delivery of the two stainless steel structures, manufactured by GEMS Engineering, the first ever Hungarian ITER components have finally been installed into the machine. These structures are part of two key diagnostic systems of the machine - the divertor Thompon scattering and the erosion deposition monitor. From these two the EDM is the first diagnostic system of ITER which is being designed and will be manufactured completely by Hungarian companies.
[learn more about project]

Alignment jigs for mounting the outer vessel steady state sensors of the ITER fusion reactor

Induction heating of the bolt samples. A total of 15000 thermal cycles were performed between 100 and 200 °C
GEMS Engineering Ltd. has become the first ever Hungarian private company, that has supplied components to be used for the assembly of the ITER fusion reactor.
The ITER machine will be used for scientific-technological purposes, to help the engineers and scientists know how the fusion plasma behaves at large scales. For this reason, one of the most important components of this huge machine are the small magnetic diagnostic sensors which will need to be perfectly mounted to have accurate signals from them before, during, and after the plasma pulses. GEMS Engineering Ltd. won the contract for the design and manufacturing of jigs for the alignment of the tangential and normal outer vessel steady state magnetic sensors in three sectors (2, 5 and 8). GEMS produced 10 pieces of jigs which would be used to accurately set-up all the 60 sensors. These jigs will “only” be used for aligning the sensors and they will be removed thereafter, in order not to contaminate the components that remain attached to the vacuum vessel. During the manufacturing, exclusively certified stainless steel and bronze raw materials were allowed to be used.

Latest news

Jigs for the alignment of the tangential and normal outer vessel steady state magnetic sensors
Alignment jigs supplied by GEMS are in use during the assembly of the ITER fusion reactor
[30 July 2022] GEMS Engineering Ltd. became part of the assembly phase of the ITER machine via their alignment jigs manufactured and delivered some months ago to the ITER site. At the beginning of the summer, the assembly team started to use the jigs for mounting the normal and tangential steady state magnetic sensors to the outer surface of the vacuum vessel of the ITER fusion reactor. [continue reading...]
Jigs for the alignment of the tangential and normal outer vessel steady state magnetic sensors
Project completed!
[11 January 2022] The jigs were shipped to the ITER Organization to Cadarache, France in mid-January 2022 and they will be used for mounting of the sensors from April onwards.
[learn more about project]

Tests of locking mechanisms for ITER

Induction heating of the bolt samples. A total of 15000 thermal cycles were performed between 100 and 200 °C
Induction heating of the bolt samples. A total of 15000 thermal cycles were performed between 100 and 200 °C
Different kinds of fasteners are used in ITER for the fixation of functional and structural in-vessel diagnostic components. The fasteners should retain initial tightening preload in vacuum under neutronic irradiation, thermal cycling and vibrations. These conditions can lead to incidental unscrewing of some bolts and nuts if they are not locked properly. They shall be equipped with some locking features which in most cases shall be remote handling compatible. One of the candidates on a role of a locking mechanism is Spiralock type thread. Custom designed so called First Wall Samples (CuCrZr) with M16 fine thread and standard M8 bolts (316L) were the subject of our studies. ITER-like thermal cycling alternating with vibration tests were applied to the components. Fasteners' loosening was monitored via periodic torque audits. For comparison with the Spiralock thread, tests with normal metric threads were also performed under the same experimental conditions.

Latest news

Jigs for the alignment of the tangential and normal outer vessel steady state magnetic sensors
Project completed!
[24 August 2018] The task has been accomplished for ITER. We have closed this project.
[learn more about project]

Major references

GEMS Engineering is deeply involved in and fully devoted to the success of the ITER project. As a result, our main reference works are in connection with ITER, and - more closely - to its diagnostic systems.

The ITER device, currently under construction in the south of France, will study the potential of controlled nuclear fusion to provide energy for mankind. In order to study the behaviour of this device, a set of monitoring systems (referred to as Diagnostics) is required. These Diagnostics will provide the information required to understand the performance of the device.

Infrastructure development for in-vessel diagnostic signal transmission
Infrastructure development for in-vessel diagnostic signal transmission
The Erosion Deposition Monitor under the divertor dome in ITER
The Erosion Deposition Monitor under the divertor dome in ITER
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