17 citations · 45 across the 10 of their papers we have counts for
10 papers
The effect of toroidicity on relaxed states at low aspect ratio
R. Paccagnella, S. Masamune, I. Predebon +1
The experimentally measured single helical states in the low aspect ratio (R/a=2) RELAX device have been compared with the predictions of a cylindrical relaxation theory and a subs…
Relaxation models for Single Helical reversed field pinch plasmas at low aspect ratio
R. Paccagnella, S. Masamune, A. Sanpei
A recent study [1] about the scaling with the aspect ratio (i.e. the ratio between the major and minor radius of the torus) of the dominant mode in Single Helical (SH) Reverse Fiel…
From Single Helical relaxed states to helical equilibria
Roberto Paccagnella
This paper analyzes the relationship between the Single Helical relaxed states studied in R. Paccagnella, Phys. of Plasmas 23 (2016) 092512 and the so called 'helical ohmic equilib…
Aspect ratio scaling of the Single Helical states in the Reversed Field Pinch plasmas
Roberto Paccagnella
In this paper a new idea is presented which is able to predict the scaling law with the aspect ratio for the toroidal mode number of the so called Single Helicity states in Reverse…
Relaxation models for Single Helical Reversed Field Pinch plasmas
Roberto Paccagnella
In this paper a relaxation theory, proposed several years ago for plasmas where a single dominant mode is present, is revisited. The solutions of the related eigenvalue problem are…
An active feedback recovery technique from disruption events induced by m=2 n=1 tearing modes in ohmically heated tokamak plasmas
P. Zanca, R. Paccagnella, C. Finotti +6
We present experimental results of magnetic feedback control on the m=2, n=1 tearing mode in RFX-mod operated as a circular ohmically heated tokamak. The feedback suppression of th…
Magnetic axis safety factor of finite spheromaks and transition from spheromaks to toroidal magnetic bubbles
Paul M. Bellan, Roberto Paccagnella
The value of the safety factor on the magnetic axis of a finite-beta spheromak is shown to be a function of beta in contrast to what was used in P. M. Bellan, Phys. Plasmas 9, 3050…
Tokamak operation at low q and scaling toward a fusion machine
R. Paccagnella
Operation of a tokamak with q edge around 2 is discussed in this paper. It is shown that an L mode operation at a relatively high toroidal magnetic field can produce confinement co…
Resistive g-modes in a reversed field pinch plasma
M. Zuin, S. Spagnolo, R. Paccagnella +5
First direct experimental evidence of high frequency, high toroidal mode number (n>20), magnetic fluctuations due to unstable resistive interchange modes (g-modes) resonant in the…
Signatures of non-Markovian turbulent transport in Reversed Field Pinch plasmas
F. Sattin, R. Paccagnella, F. D'Angelo
Transport of field lines is studied for a realistic model of magnetic field configuration in a Reversed Field Pinch. It is shown that transport is anomalous, i.e., it cannot be des…