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  • The making of a ring coil—a photo story

    From one end to the other of the on-site manufacturing facility for poloidal field coils, the different production stations are now clearly delimited, with tool [...]

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  • An unexpected fusion spinoff: aircraft carrier catapult

    The US company General Atomics is fabricating the 'beating heart of ITER,' an electromagnet called the central solenoid that is so large and powerful, that its [...]

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  • First steps towards "energizing"

    It takes more than the flipping of a switch to connect the ITER site to the French national grid. The operation, called a 'first energizing,' is a complex, step [...]

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  • The bioshield rises

    The bioshield structure is rising at the heart of the Tokamak Building. The last plot of the B1 level was poured last week; about half of the first ground level [...]

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  • Barcelona Supercomputer Center and ITER strengthen ties

    In a Memorandum of Understanding signed on 12 January 2017, the ITER Organization and the Barcelona Supercomputing Center (BSC) in Spain have agreed 'to promote [...]

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Of Interest

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PA for Spider's Power Supply and Calorimeter signed

Shishir P. Deshpande, Head of the Indian Domestic Agency, after the signature with his team: Ujjwal K. Baruah, Chandramoulli Rotti, Narinder P. Singh, Dilshad A. Sulaiman, Aruna M. Thakar and KGV Nair. (Click to view larger version...)
Shishir P. Deshpande, Head of the Indian Domestic Agency, after the signature with his team: Ujjwal K. Baruah, Chandramoulli Rotti, Narinder P. Singh, Dilshad A. Sulaiman, Aruna M. Thakar and KGV Nair.
This week, the Procurement Arrangement for the 100 kV Power Supply of the SPIDER test facility and calorimeter was signed by Shishir Deshpande, the Head of the Indian Domestic Agency. ITER Director-General Osamu Motojima signed the contract on 10 December. SPIDER is the source for Production of Ion of Deuterium Extracted Radio Frequency plasma. SPIDER - together with MITICA (Megavolt ITER injector & Concept Advance) - comprise PRIMA (Padua Research on ITER Megavolt Accelerator) that is also known as the Neutral Beam Test Facility (NBTF). The NBTF will be located in Padua, Italy.

The two main functions of SPIDER's calorimeter are to intercept the negative ion beam inside the vacuum vessel, and to measure the thermal loads for beam diagnostic. (Click to view larger version...)
The two main functions of SPIDER's calorimeter are to intercept the negative ion beam inside the vacuum vessel, and to measure the thermal loads for beam diagnostic.
On the full size NBTF, ITER components and subsystems for ITER's powerful neutral beams will be tested and developed. For example, it will test the ITER injector at full power and pulse length, thus establishing all the methods and procedures needed to fully commission the injectors on ITER, independently of ITER, using the built-in calorimeter.

The main objective of the SPIDER test bed is to optimize, as far as possible, the performance of the full ITER size ion source at full extracted current, at full pulse length with a source uniformity within ±10 % and in hydrogen and deuterium operation.

The calorimeter consists of two actively cooled panels composed of axial arrays of hypervapotron elements; the coolant manifolds and flexible hydraulic connections; two panel support frames to support the hypervapotron elements allowing free thermal deformations of the hypervapotron elements; and a beam dump support structure for connection to the front lid of the SPIDER Vacuum Vessel. (Click to view larger version...)
The calorimeter consists of two actively cooled panels composed of axial arrays of hypervapotron elements; the coolant manifolds and flexible hydraulic connections; two panel support frames to support the hypervapotron elements allowing free thermal deformations of the hypervapotron elements; and a beam dump support structure for connection to the front lid of the SPIDER Vacuum Vessel.
The SPIDER Power Supply (PS) System shall provide the electric power to the SPIDER accelerator grids and shall supply the SPIDER ion source and the auxiliary components. A section of the SPIDER PS system, called -100 kV PS, shall be capable of voltage regulation and of switch off in case of grid breakdown.


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