Preliminary design of the COMPASS upgrade tokamak

First Spectroscopic Measurements on the COMPASS Tokamak

Spectroscopic measurements were performed on the re-installed COMPASS tokamak during the first experiments. The impurity survey spectrometer HR 2000+ was used for registration of the most intense spectral lines in the 457–663nm visible range integrated over the discharge duration. The temporal evolution of integral visible light, Hα and hard X-rays intensities are measured by a photomultipliers...

Electron Cyclotron Emission Radiometer Upgrade on the JET Tokamak . Electron Cyclotron Emission Radiometer Upgrade on the JET Tokamak

Optimization of Magnetic Perturbation Spectra for the COMPASS Tokamak

The COMPASS tokamak, recently transferred from UKAEA Culham to IPP Prague, is equipped with a set of saddle coils for producing controlled resonant magnetic perturbations (RMPs). In the future experimental programme of COMPASS we plan to focus on studies of RMPs, especially in view of their application as an ELM control mechanism and their planned use in ITER. In the present contribution we des...

New High Resolution Thomson Scattering System for the COMPASS Tokamak

The COMPASS tokamak is being re-installed at IPP Prague after its transfer from Culham, U.K. Within the innovation, new diagnostics will be constructed, including a High Resolution Thomson Scattering System measuring electron temperature (Te) and electron density (ne) profiles. Scientific programme of the COMPASS tokamak is focused on the pedestal studies, thus the main stress will be laid on t...

Dust Observation in the COMPASS Tokamak Using Fast Camera

The dust grains were observed over a thousand discharges in the tokamak COMPASS. A novel method for semi-automatic extraction and tracking of dust grains using a relatively low frame-rate camera (370 fps) was proposed. Radiation lifetime, time evolution and the acceleration of the dust grains were studied. The measured dust velocities roughly correspond to a simple model. However, slow dust par...