Results of Recent Experiments on GDT Device After Upgrade of Heating Neutral Beams

Modulating the neutron flux from a mirror neutron source

“…For the trapped power of ~ 20 MW the length can be ~ 1 m. Operating in this, relatively energy-inefficient regime is beneficial for several reasons. First, in terms of the dimensionless parameters, it does not deviate significantly from those already produced on the GDT device [2,9]; it is micro-and MHD stable in the framework of an axisymmetric geometry (Cf. a recent review [10]).…”

“…This is a property that allows a concentration of the neutron production in a well-defined region of the source, see, e.g., Refs. [1,2,3,7]. It proves to be beneficial for controlled periodical axial displacement of a right boundary of a high-flux zone, so that the neutron production at the right end of the "shelf" decreases to a small value and then comes back (we are referring here to the right-hand test zone shown in Fig.…”

“…Here n i is the hot ion density and it is assumed (in agreement with more detailed calculations) that cold ions have a temperature not exceeding the electron temperature. For the parameters of the GDT experiment [2] and the related neutron source design, one has n cold~ni , this meaning that ! cold~Te / W i ( ) !…”

“…Its design is well supported by the existing experimental data from the on-going mirror experiment at Novosibirsk [2,3]. The flux of 2 MW/m 2 of 14 MeV neutrons would allow performing the life-time tests of critical components of the first wall and blanket.…”

A 14 MeV fusion neutron source for material and blanket development and fission fuel production

“…To qualify materials and components will require testing in such a neutron environment. The Gas Dynamic Trap (GDT) concept has been shown to have this potential [1][2][3][4][5][6]. The first part of this paper considers how the GDT concept could be employed to evaluate the consequences of expected temporal variations of fusion system output [7][8][9].…”