Preliminary design of the control and data acquisition systems for the Neutral Beam Test Facility

Luchetta, A.; Barana, O.; Manduchi, G.; Taliercio, C.

doi:10.1016/j.fusengdes.2009.01.087

Cited by 3 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It may be noted that the final choice of a suitable filter for the RF driven negative ion source depends on experimental verifications of the concepts which may be carried out at ELISE test bed in IPP, 29 Garching or the SPIDER facility in Padova, Italy. 30 The electrostatic optimization has been carried out with SLACCAD and resulted in a beamlet RMS divergence of 2.2 mrad for an extraction voltage of 9.8 kV, while OPERA-3D calculated 2.08 mrad. When all the magnetic fields are included in the simulation, a beamlet divergence of 4.0 mrad is found.…”

Section: Discussionmentioning

confidence: 99%

Physics design of a 100 keV acceleration grid system for the diagnostic neutral beam for international tokamak experimental reactor

Singh

Esch

2010

Review of Scientific Instruments

View full text Add to dashboard Cite

This paper describes the physics design of a 100 keV, 60 A H(-) accelerator for the diagnostic neutral beam (DNB) for international tokamak experimental reactor (ITER). The accelerator is a three grid system comprising of 1280 apertures, grouped in 16 groups with 80 apertures per beam group. Several computer codes have been used to optimize the design which follows the same philosophy as the ITER Design Description Document (DDD) 5.3 and the 1 MeV heating and current drive beam line [R. Hemsworth, H. Decamps, J. Graceffa, B. Schunke, M. Tanaka, M. Dremel, A. Tanga, H. P. L. De Esch, F. Geli, J. Milnes, T. Inoue, D. Marcuzzi, P. Sonato, and P. Zaccaria, Nucl. Fusion 49, 045006 (2009)]. The aperture shapes, intergrid distances, and the extractor voltage have been optimized to minimize the beamlet divergence. To suppress the acceleration of coextracted electrons, permanent magnets have been incorporated in the extraction grid, downstream of the cooling water channels. The electron power loads on the extractor and the grounded grids have been calculated assuming 1 coextracted electron per ion. The beamlet divergence is calculated to be 4 mrad. At present the design for the filter field of the RF based ion sources for ITER is not fixed, therefore a few configurations of the same have been considered. Their effect on the transmission of the electrons and beams through the accelerator has been studied. The OPERA-3D code has been used to estimate the aperture offset steering constant of the grounded grid and the extraction grid, the space charge interaction between the beamlets and the kerb design required to compensate for this interaction. All beamlets in the DNB must be focused to a single point in the duct, 20.665 m from the grounded grid, and the required geometrical aimings and aperture offsets have been calculated.

show abstract

Section: Discussionmentioning

confidence: 99%

Physics design of a 100 keV acceleration grid system for the diagnostic neutral beam for international tokamak experimental reactor

Singh

Esch

2010

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

“…Another important point of consideration is that the beam source, except for the extractor and accelerator system, needs to be identical for the DNB and H&CD beam lines. The optimal usable configuration of the ion source for ITER is expected to evolve after detailed experiments at RADI and ELISE in IPP [5], Garching, with sources half the size of ITER followed by experiments at the SPI-DER facility [6] in RFX Padova, Italy where the full sized ITER source shall be tested. Keeping in view the commonalities and the evolving design, the procurement of the ion source for the INTF has been phased so as to optimally utilize the configurational inputs which come out as a result of the experimental efforts at the above mentioned facilities.…”

Section: Introductionmentioning

confidence: 99%