EFFECTS OF MAJOR RADIUS COMPRESSION IN JET
According to the adiabatic laws the temperature should scale with the compression ratio to the 4/3. Thus one would have expected a 10% increase in Te and Ti while the experimental values are respectively an increase by 20% and 30%. This is probably due to the appreciable ohmic contribution as it is shown by the analysis of the magnetic data. It is obviously difficult to quantify in detail the balance of the power fluxes in a transient, however the increase of both the ion and electron central temperature is much faster than the resistive skin time and this may suggest the presence of an anomalous penetration of the plasma current which may contribute to the increase of the plasma temperature. The electron density scales in agreement with the adiabatic scalings. It should be stressed that, despite the relative changes in plasma parameters being small, there seems to be an enhancement in the thermal content of the discharge which seems to originate both from the flux variation and from the radial compression.
Bibliographic Reference: 13TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA HEATING, SCHLIERSEE (GERMANY), APRIL 14-18, 1986 PP. 69-72 WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK) MENTIONING REPORT JET-P(86)15, 1986
Record Number: 1989125008900 / Last updated on: 1987-01-01
Available languages: en