Investigation of neutral particle dynamics in Aditya tokamak plasma with DEGAS2 code

Dey, Ritu; Ghosh, Joydeep; Chowdhuri, M. B.; Manchanda, R.; Banerjee, S.; Ramaiya, N.; Sharma, Deepti; Srinivasan, R.; Stotler, D. P.

doi:10.1088/1741-4326/aa739c

Investigation of neutral particle dynamics in Aditya tokamak plasma with DEGAS2 code

Journal Article · Fri Jun 09 00:00:00 EDT 2017 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/aa739c· OSTI ID:1373089

Dey, Ritu ^[1]; Ghosh, Joydeep ^[1]; Chowdhuri, M. B. ^[1]; Manchanda, R. ^[1]; Banerjee, S. ^[1]; Ramaiya, N. ^[1]; Sharma, Deepti ^[1]; Srinivasan, R. ^[1]; Stotler, D. P. ^[2]

Inst. for Plasma Research, Gandhinagar, Gujarat (India)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Neutral particle behavior in Aditya tokamak, which has a circular poloidal ring limiter at one particular toroidal location, has been investigated using DEGAS2 code. The code is based on the calculation using Monte Carlo algorithms and is mainly used in tokamaks with divertor configuration. This code has been successfully implemented in Aditya tokamak with limiter configuration. The penetration of neutral hydrogen atom is studied with various atomic and molecular contributions and it is found that the maximum contribution comes from the dissociation processes. For the same, H_α spectrum is also simulated which was matched with the experimental one. The dominant contribution around 64% comes from molecular dissociation processes and neutral particle is generated by those processes have energy of ~ 2.0 eV. Furthermore, the variation of neutral hydrogen density and H_α emissivity profile are analysed for various edge temperature profiles and found that there is not much changes in H_α emission at the plasma edge with the variation of edge temperature (7 to 40 eV).

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: Aditya Team

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1373089

Alternate ID(s):: OSTI ID: 22765355
OSTI ID: 22925825

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 8 Vol. 57; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (24)

Three-Dimensional Neutral Transport Simulations of Gas Puff Imaging Experiments Stotler, D. P.; D'Ippolito, D. A.; LeBlanc, B. Contributions to Plasma Physics, Vol. 44, Issue 13 https://doi.org/10.1002/ctpp.200410045	journal	April 2004
Neutral Gas Transport Modeling with DEGAS 2 Stotler, Daren; Karney, Charles Contributions to Plasma Physics, Vol. 34, Issue 2-3 https://doi.org/10.1002/ctpp.2150340246	journal	January 1994
Elementary Processes in Hydrogen-Helium Plasmas: Cross Sections and Reaction Rate Coefficients Janev, Ratko K.; Langer, William D.; Post, Douglass E. Springer Series on Atoms and Plasmas https://doi.org/10.1007/978-3-642-71935-6	book	January 1987
Neutral transport simulations of gas puff imaging experiments Stotler, D.; Labombard, B.; Terry, J. Journal of Nuclear Materials, Vol. 313-316 https://doi.org/10.1016/S0022-3115(02)01495-2	journal	March 2003
Effect of boundary conditions on the neutral gas temperatures and densities in the ITER divertor and pump duct Ruzic, D. N.; Juliano, D. R. Journal of Nuclear Materials, Vol. 196-198 https://doi.org/10.1016/S0022-3115(06)80030-9	journal	December 1992
GTNEUT: A code for the calculation of neutral particle transport in plasmas based on the Transmission and Escape Probability method Mandrekas, John Computer Physics Communications, Vol. 161, Issue 1-2 https://doi.org/10.1016/j.cpc.2004.04.009	journal	August 2004
Simulation of main-chamber recycling in DIII-D with the UEDGE code Rensink, M. E.; Groth, M.; Porter, G. D. Journal of Nuclear Materials, Vol. 363-365 https://doi.org/10.1016/j.jnucmat.2007.01.252	journal	June 2007
Analysis of neutral particle recycling and pedestal fueling in a H-mode DIII-D discharge Friis, Z. W.; Stacey, W. M.; Leonard, A. W. Physics of Plasmas, Vol. 17, Issue 2 https://doi.org/10.1063/1.3305809	journal	February 2010
Midplane neutral density profiles in the National Spherical Torus Experiment Stotler, D. P.; Scotti, F.; Bell, R. E. Physics of Plasmas, Vol. 22, Issue 8 https://doi.org/10.1063/1.4928372	journal	August 2015
Modeling of neutral hydrogen velocities in the Tokamak Fusion Test Reactor Stotler, D. P.; Skinner, C. H.; Budny, R. V. Physics of Plasmas, Vol. 3, Issue 11 https://doi.org/10.1063/1.871540	journal	November 1996
Effects of neutral particles on edge dynamics in Alcator C-Mod plasmas Boivin, R. L.; Goetz, J. A.; Hubbard, A. E. Physics of Plasmas, Vol. 7, Issue 5 https://doi.org/10.1063/1.874016	journal	May 2000
Recombination in dense plasmas Weisheit, J. C. Journal of Physics B: Atomic and Molecular Physics, Vol. 8, Issue 15 https://doi.org/10.1088/0022-3700/8/15/017	journal	October 1975
Neutral particle dynamics in the Alcator C-Mod tokamak Niemczewski, A.; Hutchinson, I. H.; LaBombard, B. Nuclear Fusion, Vol. 37, Issue 2 https://doi.org/10.1088/0029-5515/37/2/I04	journal	February 1997
Measurement of neutral density near the X point in the DIII-D tokamak Colchin, R. J.; Maingi, R.; Fenstermacher, M. E. Nuclear Fusion, Vol. 40, Issue 2 https://doi.org/10.1088/0029-5515/40/2/303	journal	February 2000
Spatially resolved H _α -emission simulation with EIRENE in TJ-II to study hydrogen atomic and molecular physics in low density, high temperature fusion edge plasmas de la Cal, E.; Guasp, J.; Salas, A. Nuclear Fusion, Vol. 48, Issue 9 https://doi.org/10.1088/0029-5515/48/9/095005	journal	August 2008
Investigation of oxygen impurity transport using the O ⁴⁺ visible spectral line in the Aditya tokamak Chowdhuri, M. B.; Ghosh, J.; Banerjee, S. Nuclear Fusion, Vol. 53, Issue 2 https://doi.org/10.1088/0029-5515/53/2/023006	journal	February 2013
Edge transport barrier phenomena in Alcator C-Mod Hutchinson, I. H.; Granetz, R. S.; Hubbard, A. Plasma Physics and Controlled Fusion, Vol. 41, Issue 3A https://doi.org/10.1088/0741-3335/41/3A/054	journal	January 1999
Numerical modelling of high density JET divertor plasma with the SOLPS4.2 (B2-EIRENE) code Kotov, V.; Reiter, D.; Pitts, R. A. Plasma Physics and Controlled Fusion, Vol. 50, Issue 10 https://doi.org/10.1088/0741-3335/50/10/105012	journal	September 2008
Space- and time-resolved visible-emission spectroscopy of Aditya-tokamak discharges using multi-track spectrometer Banerjee, Santanu; Kumar, Vinay; Chowdhuri, M. B. Measurement Science and Technology, Vol. 19, Issue 4 https://doi.org/10.1088/0957-0233/19/4/045603	journal	February 2008
Estimation of Neutral Density in Edge Plasma with Double Null Configuration in EAST Zhang, Ling; Xu, Guosheng; Ding, Siye Plasma Science and Technology, Vol. 13, Issue 4 https://doi.org/10.1088/1009-0630/13/4/09	journal	August 2011
Application of DEGAS for Ion Temperature Profile Reconstruction from a NPA Diagnostic on HL-2A Xia, Zhiwei; Li, Wei; Yang, Qingwei Plasma Science and Technology, Vol. 15, Issue 2 https://doi.org/10.1088/1009-0630/15/2/04	journal	February 2013
Improvement of Plasma Performance with Lithium Wall Conditioning in Aditya Tokamak Chowdhuri, M. B.; Manchanda, R.; Ghosh, J. Plasma Science and Technology, Vol. 15, Issue 2 https://doi.org/10.1088/1009-0630/15/2/09	journal	February 2013
The EIRENE and B2-EIRENE Codes Reiter, D.; Baelmans, M.; Börner, P. Fusion Science and Technology, Vol. 47, Issue 2 https://doi.org/10.13182/FST47-172	journal	February 2005
Neutral Particle Kinetics in Fusion Devices Tendler, Michael; Heifetz, Daniel Fusion Technology, Vol. 11, Issue 2 https://doi.org/10.13182/FST87-A25010	journal	March 1987

Cited By (4)

Plasma rotation measurement using UV and visible spectroscopy on Aditya-U tokamak Shukla, G.; Chowdhuri, M. B.; Shah, K. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5039333	journal	October 2018
Numerical estimation of the oxygen impurity transport in the Aditya tokamak Bhattacharya, Amrita; Ghosh, Joydeep; Chowdhuri, M. B. Physics of Plasmas, Vol. 27, Issue 2 https://doi.org/10.1063/1.5115230	journal	February 2020
Spatial Profile of Neutral Temperature Measurement in Aditya-U Tokamak Plasmas Yadava, Nandini; Ghosh, Joydeep; Chowdhuri, Malay Bikas Atoms, Vol. 7, Issue 3 https://doi.org/10.3390/atoms7030087	journal	September 2019
Modeling of the Hα Emission from ADITYA Tokamak Plasmas Dey, Ritu; Chowdhuri, Malay B.; Ghosh, Joydeep Atoms, Vol. 7, Issue 4 https://doi.org/10.3390/atoms7040095	journal	October 2019

Similar Records

Investigation of atomic and molecular processes in H_α emission through modelling of measured H_α emissivity profile using DEGAS2 in the ADITYA tokamak

Journal Article · Wed May 22 20:00:00 EDT 2019 · Nuclear Fusion · OSTI ID:1558755

Overview of physics results from the ADITYA-U tokamak and future experiments

Journal Article · Thu Aug 22 20:00:00 EDT 2024 · Nuclear Fusion · OSTI ID:2441287

Measurement of spatial and temporal behavior of H{sub α} emission from Aditya tokamak using a diagnostic based on a photomultiplier tube array

Journal Article · Fri Nov 14 23:00:00 EST 2014 · Review of Scientific Instruments · OSTI ID:22308944

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Aditya
DEGAS2
Hα
atomic and molecular processes
neutral particle

Investigation of neutral particle dynamics in Aditya tokamak plasma with DEGAS2 code

Citation Formats

References (24)

Cited By (4)

Similar Records

Related Subjects