By the integration of electro-conductive properties in the fabric structure a flexible textile can be obtained that does not reduce the quality of comfort, maintenance and wearability of clothing. Each type of yarn has its advantages and disadvantages, for example, metal coated polymer multifilament yarn has a lower resistance to heat than metal multifilament yarn, but it is more flexible. During this research conductive knitted patterns were made and tested. For the experiments more suitable yarns for knitting were selected, which had a lower resistance and were visually less changing of the knitted pattern in appearance: silver coated multifilament polyamide, products of two different companies; stainless steel multifilament yarn and polyester/stainless steel spun yarn. The single-faced patterns of non-conductive yarn and straight and figural conductive traces of conductive yarns were knitted. A test was made with the purpose of finding out the electrical resistance of knitted textile affected by force. Knit warm-up potency was researched during temperature measurement tests. Knitting test pieces were also evaluated by aspect of technical structure and visual appearance. Generally, it was concluded that steel yarns could not be used for knitting while silver coated polyamide yarns are suitable for the manufacture of knitted heating elements. As a result of this research, knitwear with a textile heating element was made.

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A general theory is presented for the dynamics of nth-degree-of-freedom articulated (lumped flexibility) models of cantilevers conveying fluid, of which the two-degree-of-freedom model of a column subjected to follower forces (first investigated by Ziegler) is a particular case. The ability of the articulated system to predict the dynamical behaviour of the continuous system modelled is investigated, and in particular the paradox that, whereas the continuous system is subject to only oscillatory instability (at sufficiently high flow), the model is generally subject to both oscillatory and buckling instabilities, and sometimes only to the latter. Complex frequency calculations show that buckling is associated with the higher modes of the articulated system, which, irrespective of the number of degrees of freedom, do not model well the corresponding modes of the continuous system. The critical flow velocities for buckling and oscillatory instabilities are calculated extensively, the latter showing good convergence to the corresponding values of the continuous system. The theory is supported by a set of experiments. Agreement between theory and experiment is satisfactorily good.

This paperpresents an overview of results of the 1994/95 experimental campaign on JET with the new pumped divertor and draws implications for ITERin the areas of detached and radiative divertorplasmas, theuseofberyllium as a divertor target tile malerial, the confmement properties of discharges with the same dimensionless parameters (exceptforthedimensionless Larmorradius) as lT!3R and the effect of varying the toroidal magnetic field ripple in the FTER relevant range.Discbarges withhigh fusionpe~ormance athighcurrentjn steadystate with ELMS and in the ELM-free hot -ion H-mode, are also reported. Limits to operations are discussed and projections to D-T performance are made.

The JET machine is equipped with 32 toroidal field coils. In order to study the effect of TF ripple on the confinement of fast particles and, mnre generally, on the plasma behaviour, a series of experiments was performed using only 16 TF coils. At the position of the outer limiter, this led to an increase of the ripple, b=(Bm,-Bmin)i(Bm,,+Bmin), from 1% to 12.5%. The toroidal field was limited to 1.4 T, with plasma currents in the range between 2 and 3 MA. Additional heating power-levels and energy-input were kept low in order lo avoid possible damage to some first wall components made out of Inconel. Experiments were carried out using 140 keV NBI injected deuterons, ICRF accelerated protons and deuterons (-0.5 lo -2 MeV) and 1 MeV tritons from DD reactions. KEYWORDSTokamak; Toroidal field ripple; Fast particle confinement; a-particle simulations; ICRF heating (2nd harmonic H minurity & 4th harmonic NBI injected D"); Triton bum-up.