Advanced ion beam calorimetry for the test facility ELISE

The negative ion source test facility ELISE (Extraction from a Large Ion Source Experiment) is in operation since beginning of 2013 at the Max-Planck-Institut fur Plasmaphysik (IPP) in Garching bei Munchen. The large radio frequency driven ion source of ELISE is about 1×1 m2 in size (1/2 the ITER source) and can produce a plasma for up to 1 h. Negative ions can be extracted and accelerated by an ITER-like extraction system made of 3 grids with an area of 0.1 m2, for 10 s every 3 minutes. A total accelerating voltage of up to 60 kV is available, i.e. a maximum ion beam power of about 1.2 MW can be produced. ELISE is equipped with several beam diagnostic tools for the evaluation of the beam characteristics. In order to evaluate the beam properties with a high level of detail, a sophisticated diagnostic calorimeter has been installed in the test facility at the end of 2013, starting operation in January 2014. The diagnostic calorimeter is split into 4 copper plates with separate water calorimetry for each of...

[1]  R. S. Hemsworth,et al.  Status of the ITER heating neutral beam system , 2009 .

[2]  B Heinemann,et al.  The development of the radio frequency driven negative ion source for neutral beam injectors (invited). , 2012, The Review of scientific instruments.

[3]  A. Tanga,et al.  The Negative Ion based Diagnostic Neutral Beam for ITER , 2009 .

[4]  C. Martens,et al.  Progress of the development of the IPP RF negative ion source for the ITER neutral beam system , 2007 .

[5]  R. Pasqualotto,et al.  BATMAN beam properties characterization by the beam emission spectroscopy diagnostic , 2015 .

[6]  C. Martens,et al.  Overview of the RF source development programme at IPP Garching , 2006 .

[7]  C. Martens,et al.  Development of a RF-driven ion source for the ITER NBI system , 2009 .

[8]  B. Heinemann,et al.  Beam diagnostic tools for the negative hydrogen ion source test facility ELISE , 2013 .

[9]  Irving Langmuir,et al.  The Effect of Space Charge and Residual Gases on Thermionic Currents in High Vacuum , 1913 .

[10]  B. Heinemann,et al.  Status of the ELISE test facility , 2015 .

[11]  B. Heinemann,et al.  Design of the half-size ITER neutral beam source for the test facility ELISE , 2009 .

[12]  C. Martens,et al.  The negative ion source test facility ELISE , 2011 .

[13]  C. Martens,et al.  Physical performance analysis and progress of the development of the negative ion RF source for the ITER NBI system , 2009 .

[14]  U. Fantz,et al.  Magnetic filter field for ELISE - Concepts and design , 2013 .

[15]  C. Wimmer,et al.  Size Scaling of Negative Hydrogen Ion Sources for Fusion , 2015 .

[16]  F. Bonomo,et al.  Optical emission spectroscopy at the large RF driven negative ion test facility ELISE: instrumental setup and first results. , 2013, The Review of scientific instruments.