Novel electron beam based test facility for observation of dynamics of tungsten erosion under intense ELM-like heat loads

Observation of dust particles ejected from tungsten surface under impact of intense transient heat load

“…In the experiments carried out on the GOL-3 device, several techniques for in situ diagnostic of ablated material are employed [5,6]. Targets from rolled tungsten with mm 2 and thickness of 3 -4 mm were used in these experiments.…”

Comparison of tungsten modification after irradiation at different facilities for PSI studies

“…Parameters of the energy loads of plasma stream for the GOL-3 long pulse accelerator [9], [20], [21] are very close to the QSPA parameters: a pulse duration of up to 0.3 ms and energy loads of up to 2.5 MJ/m 2 . Irradiated surface area in both cases is big enough to use 1D codes and exclude edge effects.…”

“…For example, let us compare irradiation conditions in GOL-3 [20] and QSPA Kh-50 [6], [14]. Parameters of the energy loads of plasma stream for the GOL-3 long pulse accelerator [9], [20], [21] are very close to the QSPA parameters: a pulse duration of up to 0.3 ms and energy loads of up to 2.5 MJ/m 2 .…”

“…The QSPA data about the droplet formation are insufficient, and the GOL-3 data are important for prediction of droplet parameters for ITER transient events. Using an electron beam for heat load simulation is more diagnostics-friendly because the plasma radiation is much lower than in experiments with QSPA, so we were able to observe the dynamics of the target heating and its surface modification, as well as the microparticle ejection starting from the beginning of the heating process [20], [24].…”

Heating of tungsten target by intense pulse electron beam

“…This technology is capable to produce a pulse duration up to a ms, and beam power up to 10 MW which remains nearly constant during the pulse [8]. An electron beam test facility is created based on this technology for in-situ study of tungsten behavior under the thermal shock [9].This report describes the parameters of the thermal shock loads of pulsed electron beam on a tungsten target for typical conditions of our test facility. Measurements of integral density profile of the beam on the target as well as the energy of the beam deposited in the tungsten sample were carried out.…”