Negative ion test facility ELISE—Status and first results

Heinemann, B.; Fantz, U.; Franzen, P.; Froeschle, M.; Kraus, Werner; Martens, C.; Nocentini, R.; Riedl, R.; Ruf, B.; Schiesko, L.; Wimmer, Christian; Wuenderlich, Dirk; NNBI-Team,

doi:10.1016/j.fusengdes.2012.11.003

Cited by 31 publications

(20 citation statements)

References 12 publications

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“…The negative beam is neutralized by a gas neutralizer, positive and residual negative ions are then removed from the beam by an electrostatic dump (ERID) and finally a water cooled calorimeter dumps the beam when closed [1]. Negative ions are chosen because of their neutralization efficiency, but they are more difficult to produce and with lower current density: 20 mA/cm ITER injectors will use a radio frequency (RF) source at 1 MHz, developed and optimized at IPP-Garching, first on the BATMAN small source and then through intermediate steps up to ELISE, the half size ITER source, with up to 60 keV, 10 s, beam pulses [2]. To guarantee reliable and efficient operation of HNB on ITER at the nominal parameters and optimize its performance, a neutral beam test facility is being built at Consorzio RFX, comprising SPIDER, a 100 kV negative hydrogen/deuterium RF source, full size prototype of the HNB source, and MITICA, a 1 MeV full performance prototype of the complete HNB [3].…”

Section: Iter Heating Neutral Beam Injectors and Test Facilitymentioning

confidence: 99%

Progress On Diagnostics Of The Iter Neutral Beam Test Facility

Pasqualotto¹,

Agostini²,

Barbisan³

et al. 2016

Proceedings of 1st EPS Conference on Plasma Diagnostics — PoS(ECPD2015)

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ITER operation relies on heating neutral beam injectors (HNB) based on negative ion deuterium beams accelerated at 1 MeV, with up to one hour 17 MW power, uniform intensity and low divergence. A neutral beam test facility is being built at Consorzio RFX to demonstrate the feasibility of a prototype injector with such demanding specifications and to optimize its performances. It comprises SPIDER, a 100 kV negative hydrogen/deuterium RF source, full size prototype of the HNB source, and MITICA, a prototype of the full HNB. The diagnostics for SPIDER and MITICA are essential to qualify and optimize the HNB for ITER and to assess the information on source and beam obtainable with the reduced set of the HNB diagnostics. Main parameters are measured with different complementary techniques to exploit the combination of their specific features. In the source the still open issues of cesium dynamics, negative ion generation and uniformity are investigated with a set of electrostatic probes, with optical emission spectroscopy, laser absorption for neutral cesium density and cavity ring down spectroscopy for negative ion density. The beam profile uniformity and its divergence will be studied with beam emission spectroscopy, visible tomography, neutron imaging and a special calorimeter made of carbon tiles which can achieve a spatial resolution of few millimetres. All components heated by beam power load will be monitored with a large set of thermocouples behind the heated surfaces and on the cooling water circuits. The test facility will also be the natural choice for hosting experiments on innovative concepts for DEMO HNBs, e.g. more efficient neutralization techniques and cesium free source operation.

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Section: Iter Heating Neutral Beam Injectors and Test Facilitymentioning

confidence: 99%

Progress On Diagnostics Of The Iter Neutral Beam Test Facility

Pasqualotto¹,

Agostini²,

Barbisan³

et al. 2016

Proceedings of 1st EPS Conference on Plasma Diagnostics — PoS(ECPD2015)

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“…Using this kind of insulation the sources for the ASDEXUpgrade NBH have been running reliably for 15 years. The Cesium is evaporated by two newly designed dispenser ovens, which are mounted onto side walls with the nozzles directed parallel to the plasma grid 11 .…”

Section: Ion Sourcementioning

confidence: 99%

Commissioning of the negative ion testbed ELISE

Kraus

Fantz

Franzen

et al. 2013

AIP Conference Proceedings

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Abstract.The tests of the large RF driven sources for the ITER neutral beam system will be started on the neutral beam test facility PRIMA in Padua not before 2015. As an important intermediate step a half size ITER source has been designed at Max Planck Institute for Plasma Physics (IPP) and will be operated on the new test facility ELISE (Extraction from a Large Ion Source Experiment) which is presently being commissioned. The target is to generate a negative ion beam of 20 A, accelerated to 60 keV. Up to now all components of the test facility are assembled, the power supply, the cooling and the control system have been commissioned and the first plasma will be initiated in September. In preparatory experiments the mutual inductance of two adjacent drivers has been investigated and the coupling of a total RF power of 280 kW to a similar half size source has been demonstrated.

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“…Thus the European ITER domestic agency F4E has defined an R&D roadmap for the construction of the neutral beam heating systems [3,4]. An important step herein is the test facility ELISE (Extraction from a Large Ion Source Experiment, [5]) for a large-scale extraction from a half-size ITER RF source (1x0.9 m 2 with an extraction area of 0.1 m 2 ) is operational at the Max-Planck-Institut für Plasmaphysik since beginning of 2013 [6,7,8]. The early experience of operating such a large RF driven source gives already an important input for the design of the Neutral Beam Test Facility PRIMA in Padova [9] and the ITER NBI systems (heating beams and diagnostic beam [2,10], the latter being built by the Indian ITER Domestic Agency) and for their commissioning and operating phases.…”

Section: Introductionmentioning

confidence: 99%

Status of the ELISE test facility

2015

AIP Conference Proceedings

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Negative ion test facility ELISE—Status and first results

Cited by 31 publications

References 12 publications

Progress On Diagnostics Of The Iter Neutral Beam Test Facility

Progress On Diagnostics Of The Iter Neutral Beam Test Facility

Commissioning of the negative ion testbed ELISE

Status of the ELISE test facility

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