Search Results - "Meigs, A G"

Impact of nitrogen seeding on carbon erosion in the JET divertor by Brezinsek, S., Jachmich, S., Rapp, J., Meigs, A.G., Nicholas, C., O’Mullane, M., Pospieszczyk, A., van Rooij, G.

“…Nitrogen has been introduced in H-mode plasmas in JET in order to study its radiation cooling capability and impact on the erosion of divertor plasma-facing…”
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The impact of divertor detachment on carbon sources in JET L-mode discharges by Brezinsek, S., Meigs, A.G., Jachmich, S., Stamp, M.F., Rapp, J., Felton, R., Pitts, R.A., Philipps, V., Huber, A., Pugno, R., Sergienko, G., Pospieszczyk, A.

“…Hydrocarbon injection experiments have been performed to investigate the chemical sputtering yield of carbon-fibre composites at elevated temperatures ( T…”
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Observation of low temperature VUV tungsten emission in JET divertor plasmas by Lawson, K D, Pawelec, E, Coffey, I H, Groth, M, Litherland-Smith, E, Meigs, A G, Scully, S

“…Abstract The properties of tungsten make it ideal for use as a plasma facing surface in the divertor of large plasma machines such as JET and ITER. However,…”
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Peculiarity of highly radiating multi-impurity seeded H-mode plasmas on JET with ITER-like wall by Huber, A, Wischmeier, M, Bernert, M, Wiesen, S, Glöggler, S, Aleiferis, S, Brezinsek, S, Calabro, G, Carvalho, P, Huber, V, Sergienko, G, Solano, E R, Giroud, C, Groth, M, Jachmich, S, Linsmeier, Ch, Matthews, G F, Meigs, A G, Mertens, Ph, Sertoli, M, Silburn, S, Telesca, G

“…On JET with fully metallic first wall, highly radiative conditions with N2, Ne and Ar as well as their mixture as radiators are approached in high density…”
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Characterisation of the deuterium recycling at the W divertor target plates in JET during steady-state plasma conditions and ELMs by Brezinsek, S, Wiesen, S, Harting, D, Guillemaut, C, Webster, A J, Heinola, K, Meigs, A G, Rack, M, Gao, Y, Sergienko, G, Philipps, V, Stamp, M F, Jachmich, S, Contributors, JET

“…Experiments in the JET tokamak equipped with the ITER-like wall (ILW) revealed that the inner and outer target plate at the location of the strike points…”
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Residual carbon content in the initial ITER-Like Wall experiments at JET by Brezinsek, S., Jachmich, S., Stamp, M.F., Meigs, A.G., Coenen, J.W., Krieger, K., Giroud, C., Groth, M., Philipps, V., Grünhagen, S., Smith, R., van Rooij, G.J., Ivanova, D., Matthews, G.F.

“…The residual carbon content and carbon edge flux in JET have been assessed by three independent diagnostic techniques after start of plasma operation with the…”
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Spectroscopic camera analysis of the roles of molecularly assisted reaction chains during detachment in JET L-mode plasmas by Karhunen, J., Holm, A., Aleiferis, S., Carvalho, P., Groth, M., Lawson, K. D., Lomanowski, B., Meigs, A. G., Shaw, A., Solokha, V.

“…The roles of the molecularly assisted ionization (MAI), recombination (MAR) and dissociation (MAD) reaction chains with respect to the purely atomic ionization…”
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Spectroscopic camera analysis of the roles of molecularly assisted reaction chains during detachment in JET L-mode plasmas by Karhunen, J., Holm, A., Aleiferis, S., Carvalho, P., Groth, M., Lawson, K.D., Lomanowski, B., Meigs, A.G., Shaw, A., Solokha, V.

“…The roles of the molecularly assisted ionization (MAI), recombination (MAR) and dissociation (MAD) reaction chains with respect to the purely atomic ionization…”
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Spectroscopic investigation of N and Ne seeded induced detachment in JET ITER-like wall L-modes combining experiment and EDGE2D modeling by Lomanowski, B., Carr, M., Field, A., Groth, M., Jaervinen, A.E., Lowry, C., Meigs, A.G., Menmuir, S., O'Mullane, M., Reinke, M.L., Stavrou, C.K., Wiesen, S.

“…•N and Ne impurity seeding in JET-ILW L-mode plasmas leads to plasma detachment.•The outer target ion flux reduction is due to a decrease in ionization…”
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Deuterium Balmer/Stark spectroscopy and impurity profiles: First results from mirror-link divertor spectroscopy system on the JET ITER-like wall by Meigs, A.G., Brezinsek, S., Clever, M., Huber, A., Marsen, S., Nicholas, C., Stamp, M., Zastrow, K.-D.

“…For the ITER-like wall, the JET mirror link divertor spectroscopy system was redesigned to fully cover the tungsten horizontal strike plate with faster time…”
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Impact of the ITER-like wall on divertor detachment and on the density limit in the JET tokamak by Huber, A., Brezinsek, S., Groth, M., de Vries, P.C., Riccardo, V., van Rooij, G., Sergienko, G., Arnoux, G., Boboc, A., Bilkova, P., Calabro, G., Clever, M., Coenen, J.W., Beurskens, M.N.A., Eich, T., Jachmich, S., Lehnen, M., Lerche, E., Marsen, S., Matthews, G.F., McCormick, K., Meigs, A.G., Mertens, Ph, Philipps, V., Rapp, J., Samm, U., Stamp, M., Wischmeier, M., Wiesen, S.

“…L-mode and H-mode density limits with the ITER-like wall (ILW) have been investigated in the recent experimental campaign and compared with experiments in the…”
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Validation of SOLPS-ITER simulations with kinetic, fluid, and hybrid neutral models for JET-ILW low-confinement mode plasmas by Horsten, N., Groth, M., Dekeyser, W., Van Uytven, W., Aleiferis, S., Carli, S., Karhunen, J., Lawson, K.D., Lomanowski, B., Meigs, A.G., Menmuir, S., Shaw, A., Solokha, V., Thomas, B.

“…For JET L-mode plasmas in low-recycling conditions (electron temperature at the outer strike point, Te,ot≳30eV), SOLPS-ITER simulations agree within the error…”
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ELM and inter-ELM tungsten erosion sources in high-power, JET ITER-like wall H-mode plasmas by Kumpulainen, H.A., Groth, M., Brezinsek, S., Corrigan, G., Frassinetti, L., Harting, D., Koechl, F., Karhunen, J., Meigs, A.G., O'Mullane, M., Romazanov, J.

“…•High-power type-I ELMy JET plasmas simulated using JINTRAC and ERO2.0.•Near-perfect screening predicted for highest gross W sources at divertor targets.•W…”
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Characterisation of the scrape-off layer in JET-ILW deuterium and helium low-confinement mode plasmas by Rees, D., Groth, M., Aleiferis, S., Brezinsek, S., Brix, M., Jepu, I., Lawson, K.D., Meigs, A.G., Menmuir, S., Kirov, K., Lomas, P., Lowry, C., Thomas, B., Widdowson, A., Carvalho, P., Delabie, E.

“…Langmuir probe measurements in neutral beam injection (NBI) heated, low-confinement mode plasmas in JET ITER-like wall showed that the current to the divertor…”
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Validation of EDGE2D-EIRENE and DIVIMP for W SOL transport in JET by Kumpulainen, H.A., Groth, M., Corrigan, G., Harting, D., Koechl, F., Jaervinen, A.E., Lomanowski, B., Meigs, A.G., Sertoli, M.

“…Tungsten sputtering rates and density profiles predicted using the edge plasma codes EDGE2D-EIRENE and DIVIMP are found to agree within a factor of 4 with…”
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Interpretation of radiative divertor studies with impurity seeding in type-I ELMy H-mode plasmas in JET-ILW using EDGE2D–EIRENE by Jaervinen, A.E., Groth, M., Airila, M., Belo, P., Beurskens, M., Brezinsek, S., Clever, M., Corrigan, G., Devaux, S., Drewelow, P., Eich, T., Giroud, C., Harting, D., Huber, A., Jachmich, S., Lawson, K., Lipschultz, B., Maddison, G., Maggi, C., Makkonen, T., Marchetto, C., Marsen, S., Matthews, G.F., Meigs, A.G., Moulton, D., Stamp, M.F., Wiesen, S., Wischmeier, M.

“…Nitrogen seeded JET-ILW H-mode plasmas have been investigated with EDGE2D–EIRENE. The simulations reproduce the experimentally observed factor of 10 reduction…”
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EDGE2D-EIRENE and ERO2.0 predictions of nitrogen molecular break-up and transport in the divertor of JET low-confinement mode plasmas by Mäenpää, R., Kumpulainen, H., Groth, M., Romazanov, J., Lomanowski, B., Brezinsek, S., Di Genova, S., Karhunen, J., Lawson, K., Meigs, A.G., Menmuir, S., Shaw, A.

“…•Nitrogen-seeded partially detached JET l-mode plasmas studied using EDGE2D-EIRENE and ERO2.0.•Nitrogen line intensities (N I to N V) in the outer divertor are…”
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Divertor plasma conditions and neutral dynamics in horizontal and vertical divertor configurations in JET-ILW low confinement mode plasmas by Groth, M., Brezinsek, S., Belo, P., Brix, M., Calabro, G., Chankin, A., Clever, M., Coenen, J.W., Corrigan, G., Drewelow, P., Guillemaut, C., Harting, D., Huber, A., Jachmich, S., Järvinen, A., Kruezi, U., Lawson, K.D., Lehnen, M., Maggi, C.F., Marchetto, C., Marsen, S., Maviglia, F., Meigs, A.G., Moulton, D., Silva, C., Stamp, M.F., Wiesen, S.

“…Measurements of the plasma conditions at the low field side target plate in JET ITER-like wall ohmic and low confinement mode plasmas show minor differences in…”
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Estimation of 2D distributions of electron density and temperature in the JET divertor from tomographic reconstructions of deuterium Balmer line emission by Karhunen, J., Lomanowski, B., Solokha, V., Aleiferis, S., Carvalho, P., Groth, M., Kumpulainen, H., Lawson, K.D., Meigs, A.G., Shaw, A.

“…•2D ne and Te estimates obtained from deuterium Balmer line ratios in JET divertor.•High ne observed to shift from strike point to above X-point in L-mode…”
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Characterisation of divertor detachment onset in JET-ILW hydrogen, deuterium, tritium and deuterium–tritium low-confinement mode plasmas by Groth, M., Solokha, V., Aleiferis, S., Brezinsek, S., Brix, M., Carvalho, I.S., Carvalho, P., Corrigan, G., Harting, D., Horsten, N., Jepu, I., Karhunen, J., Kirov, K., Lomanowski, B., Lawson, K.D., Lowry, C., Meigs, A.G., Menmuir, S., Pawelec, E., Pereira, T., Shaw, A., Silburn, S., Thomas, B., Wiesen, S., Börner, P., Borodin, D., Jachmich, S., Reiter, D., Sergienko, G., Stancar, Z., Viola, B., Beaumont, P., Bernardo, J., Coffey, I., Conway, N.J., de la Luna, E., Douai, D., Giroud, C., Hillesheim, J., Horvath, L., Huber, A., Lomas, P., Maggi, C.F., Maslov, M., Perez von Thun, C., Scully, S., Vianello, N., Wischmeier, M.

“…•This paper presents characterisation of the plasma conditions in the low-field side divertor in JET ITER-like Wall hydrogen, deuterium, tritium and…”
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