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Abstract

Results from the HBTX1A Reversed Field Pinch experiment are presented and discussed. The apparatus has a thin bellows liner (R/a = 0.8 m/0.26 m) and has operated at plasma currents up to 0.5 MA. Reversed field distributions are set up by self-reversal and B-phi control, and the volts-seconds input is analyzed. In the sustainment phase, pulses up to 7 ms duration are produced by power crowbar and gas puffing and the toroidal field at the wall remains reversed by plasma action. Electron temperatures (Thomson scattering and Si(Li) detector) on axis are proportional to the current (max. 170 eV) and Z-eff#0L3, due principally to oxygen. Fluctuations in soft X-ray emission at 10 - 100 kHz are measured with surface barrier diodes and show radial correlation lengths of 2-10 cm. After the ionization stage the electron density falls by pump-out to typically 2 X 10**19 m-3 (1/N +- 5 x 10**-14 A.m.). The plasma terminates with 1/N generally rising to values 2 or 3 times higher with the streaming parameter xi greater or about 10 %. Values of beta-theta +- 2-3 % are obtained (assuming T-e = T-i)

Additional information

Authors: BODIN H A B CENTRO DI STUDIO SUI GAS IONIZZATI, PADOVA (ITALY), CENTRO DI STUDIO SUI GAS IONIZZATI, PADOVA (ITALY)
Bibliographic Reference: 9TH INTERNATIONAL CONFERENCE PLASMA PHYSICS AND CONTROLLED NUCLEAR FUSION, BALTIMORE (USA), SEPT. 1-8, 1982 PP. 641-656 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31397 ORA
Availability: Can be ordered online
Record Number: 1989122062500 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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