This article may be too technical for most readers to understand.(October 2022) |
The Tokamak Chauffage Alfvén Brésilien (TCABR) is a tokamak situated at the University of Sao Paulo ( USP), Brazil. [1] [2] TCABR is the largest tokamak in the southern hemisphere and one of the magnetic-confinement devices committed to advancing scientific knowledge in fusion power.
TCABR was originally designed and constructed in Switzerland, at the École Polytechnique Fédérale de Lausanne ( EPFL), and operated there from 1980 until 1992, under the name of Tokamak Chauffage Alfvén (TCA). [1] The main focus of TCA was to assess and enhance plasma heating with Alfvén waves. A couple of years later, the machine was transferred to USP, passing through an upgrade and adding Brésilien to its name. The operation of TCABR began in 1999. [1]
The TCABR plasma is made of hydrogen and has a circular format. [1] [3] In general, its discharges are ohmically heated and the plasma current in TCABR reaches up to . The minor and major radii of TCABR are respectively and , giving an aspect ratio of . The TCABR central electron temperature is around (i.e., ) and its mean electron density is , in units of . [1] [3] Other parameters of TCABR include the toroidal magnetic field, the hydrogen filling pressure, , a discharge duration of , and a steady-phase duration around . [1]
Parameter | Symbol | Value |
---|---|---|
Plasma format | Circular | |
Plasma composition | H | Hydrogen |
Major radius | ||
Minor radius | ||
Aspect ratio () | ||
Plasma current | ||
Central (or toroidal) magnetic field | ||
Line-averaged electronic density | ||
Central electronic temperature | ||
Hydrogen filling pressure | ||
Discharge duration | ||
Duration of the steady phase |
The current purpose of the TCABR tokamak includes the study of Alfvén waves, [1] [5] [6] but is not restricted to it. Other research areas are (i) the characterization of magnetohydrodynamic (MHD) instabilities, [1] [7] (ii) the study of high-confinement regimes induced by electrical polarization of external electrodes in the plasma edge, [3] [7] [8] (iii) the investigation of edge turbulence, [3] [9] and (iv) the study of plasma poloidal and toroidal rotation using optical diagnostics. [1] [10] [11] The TCABR team is also associated with a theoretical group focused on investigating instabilities and transport barriers in tokamaks and dynamical systems. [12] [13]
An upgrade in the TCABR is also being conducted. [14] [15] [16] A set of 108 RMP coils will be installed to control and study edge localized modes ( ELMs). New shaping coils will be added, allowing great flexibility in plasma configurations (e.g. single null, double null, snowflake, and negative triangularity configurations). [16] The vacuum-vessel inner wall of TCABR will receive graphite tiles to decrease impurity deposition and energy loss in the plasma.
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link)
This article may be too technical for most readers to understand.(October 2022) |
The Tokamak Chauffage Alfvén Brésilien (TCABR) is a tokamak situated at the University of Sao Paulo ( USP), Brazil. [1] [2] TCABR is the largest tokamak in the southern hemisphere and one of the magnetic-confinement devices committed to advancing scientific knowledge in fusion power.
TCABR was originally designed and constructed in Switzerland, at the École Polytechnique Fédérale de Lausanne ( EPFL), and operated there from 1980 until 1992, under the name of Tokamak Chauffage Alfvén (TCA). [1] The main focus of TCA was to assess and enhance plasma heating with Alfvén waves. A couple of years later, the machine was transferred to USP, passing through an upgrade and adding Brésilien to its name. The operation of TCABR began in 1999. [1]
The TCABR plasma is made of hydrogen and has a circular format. [1] [3] In general, its discharges are ohmically heated and the plasma current in TCABR reaches up to . The minor and major radii of TCABR are respectively and , giving an aspect ratio of . The TCABR central electron temperature is around (i.e., ) and its mean electron density is , in units of . [1] [3] Other parameters of TCABR include the toroidal magnetic field, the hydrogen filling pressure, , a discharge duration of , and a steady-phase duration around . [1]
Parameter | Symbol | Value |
---|---|---|
Plasma format | Circular | |
Plasma composition | H | Hydrogen |
Major radius | ||
Minor radius | ||
Aspect ratio () | ||
Plasma current | ||
Central (or toroidal) magnetic field | ||
Line-averaged electronic density | ||
Central electronic temperature | ||
Hydrogen filling pressure | ||
Discharge duration | ||
Duration of the steady phase |
The current purpose of the TCABR tokamak includes the study of Alfvén waves, [1] [5] [6] but is not restricted to it. Other research areas are (i) the characterization of magnetohydrodynamic (MHD) instabilities, [1] [7] (ii) the study of high-confinement regimes induced by electrical polarization of external electrodes in the plasma edge, [3] [7] [8] (iii) the investigation of edge turbulence, [3] [9] and (iv) the study of plasma poloidal and toroidal rotation using optical diagnostics. [1] [10] [11] The TCABR team is also associated with a theoretical group focused on investigating instabilities and transport barriers in tokamaks and dynamical systems. [12] [13]
An upgrade in the TCABR is also being conducted. [14] [15] [16] A set of 108 RMP coils will be installed to control and study edge localized modes ( ELMs). New shaping coils will be added, allowing great flexibility in plasma configurations (e.g. single null, double null, snowflake, and negative triangularity configurations). [16] The vacuum-vessel inner wall of TCABR will receive graphite tiles to decrease impurity deposition and energy loss in the plasma.
{{
cite web}}
: CS1 maint: location (
link)
{{
cite web}}
: CS1 maint: location (
link)