Results 151 to 160 of about 9,222 (184)

Estimation of Zeff in Novillo Tokamak

Journal of Nuclear Materials, 1996
Abstract We estimated the Z eff in the Novillo Tokamak after having applied a HeGDC process through two different methods: anomaly factor and mass spectrometry. The first one gave a Z eff value of 2.07 for a tokamak discharge of 4350 A plasma current and 3 V of loop voltage. By mass spectrometry 30 s after the discharge had finished a Z eff ,
R. Valencia, G. Olayo, G. Cruz, R. López, E. Chávez, L. Meléndez, A. Flores, E. Gaytán   +7 more
exaly   +2 more sources

Start-Up Without Preionization in NOVILLO Tokamak

IEEE Transactions on Plasma Science, 2000
Many tokamak devices require a preionization system in order to start up both the discharge cleaning and the main plasma discharge. A stray vertical magnetic field profile of 100 G at the center of the plasma column has been measured on the NOVILLO tokamak by magnetic probes especially made to study the breakdown process.
L. Melendez, E. Chavez, S.R. Barocio, A. Flores, G.J. Cruz, R. Lopez, M.G. Olayo   +6 more
exaly   +2 more sources

Plasma Position Measurement on the Novillo Tokamak

Fusion Engineering and Design, 2001
Abstract Considering the major and minor radii of a tokamak with circular cross-section, as well as the multipole moments analysis method of Zakharov and Safranov, this work describes how the toroidal moments of the plasma current density are determined, which are then used to derive the plasma position.
R López-Callejas
exaly   +2 more sources

Discharge Cleaning and Wall Conditioning in a Novillo Tokamak

Journal of Nuclear Materials, 2002
Abstract Our Novillo Tokamak is a small toroidal device magnetically confined defined by the main design parameters: Ro=0.23 m, av=0.08 m, ap=0.06 m, BT=0.05–0.47 T, Ip=1–12 kA, ne=1–2×1013 cm−3, Te=150 eV, Ti=50 eV. For the initial discharge chamber cleaning we have often used vacuum baking up to 100 °C and then conditioning using Taylor discharge ...
S Muhl
exaly   +2 more sources

Plasma‐Wall Interaction Delay Time in Novillo Tokamak

AIP Conference Proceedings, 2006
In this work we report the plasma‐wall interaction delay time and the impurity evolution process in Novillo tokamak. The main design parameters of the Novillo tokamak are: mayor radius Ro = 23 cm, minor radius av = 8 cm, plasma radius ap = 6 cm, toroidal field BT = 4.7 kG, plasma current Ip = 12 kA, plasma density ne = 1–2 × 1013 cm−3, electron ...
S Muhl
exaly   +2 more sources

Comparative Modelling of X-Ray Backscattering in the Novillo Tokamak

Radiation Measurements, 2001
Results of X-ray backscattering studies on the Novillo tokamak using thermoluminescent dosimeters (TLDs) are presented. Dose measurements were carried out on the equatorial plane of the tokamak along 12 radial directions. The backscattering can be due to the interaction of the radiation with the surrounding walls.
A. Flores, A. Castillo, S.R. Barocio, E. Chávez, L. Meléndez, G.J. Cruz, M.G. Olayo, P. González, J. Azorı́n   +8 more
exaly   +2 more sources

Study of Electron Energy in the Chemistry of the Glow Discharge Plasma in the Novillo Tokamak

Fusion Science and Technology, 2001
The evaluation of the electron temperature, density, and plasma potential in a glow cleaning discharge hydrogen plasma in the Novillo tokamak is presented. The objective was to investigate the plasma conditions allowing the removal of impurities from the vacuum vessel, thus avoiding the formation of other chemical compounds that could remain adhered to
Guillermo J. Cruz, Maria Guadalupe Olayo, Angel Flores, Samuel R. Barocio, Régulo López, Esteban Chávez, Leandro Meléndez   +6 more
exaly   +2 more sources

Electrical Probe Diagnostic With Fast Data Acquisition Systems of the Novillo Tokamak

AIP Conference Proceedings, 2001
This paper describes the electrical probe diagnostic system used to measure the relevant parameters of the plasma column generated in the Novillo tokamak, and an inexpensive and fast data acquisition system that consists of 16 independent channels, 8 bit resolution, sampling frequency of 500 kHz, and 8 kword memory per channel.
Raúl Valencia-Alvarado, R López-Callejas, Pacheco-Sotelo J O   +2 more
exaly   +2 more sources

Microcontroller-Based System for the Automatic Operation of the Capacitor Banks of the Novillo Tokamak

International Journal of Electronics, 2000
The design and construction of the electronic instrumentation, in its hardware and software phases, for the new automatic system that supervises and controls the capacitor bank charge of the Novillo Tokamak and carries out the discharge process, are presented.
R López-Callejas
exaly   +2 more sources