M. Stamp

Publication List Details

Period

1992 - 2009

Number

94

Co-Authors

An overview of recent erosion - deposition studies at JET (2009)

Widdowson, A., Coad, J.P., Esser, H.G., Hole, D.E., Kreter, A., Likonen, Jari, ...

12th International Workshop on Plasma Facing Materials and Components for Fusion Applications, Jülich, Germany, May 11-14, 2009

UNPREDICTABLE BINARY STRINGS (2008)

R. M. Low, M. Stamp, R. Craigen, G. Faucher

Abstract. We examine a class of binary strings arising from considerations about stream cipher encryption: to what degree can one guarantee that the number of pairs of entries distance k apart that...

In-situ tokamak laser applications for detritiation and co-deposited layers studies. (2007)

Grisolia, C., Semerok, A., Weulersse, J.M., Le Guern, F., Fomichev, S., Brygo, F., ...

17th Internat.Conf.on Plasma Surface Interactions in Controlled Fusion Devices (PSI-17), Hefei, CH, May 22-26, 2006

Exploring a small sawtooth regime in Joint European Torus plasmas with counterinjected neutral beams (2006)

Nave, M. F. F., Koslowski, H. R., Coda, S., Graves, J., Brix, M., Buttery, R., ...

During a recent reversed toroidal field (B-T) campaign at the Joint European Torus (JET), experiments were performed to investigate the effect on sawteeth of neutral beam injection (NBI)-driven...

Methane screening in JET reverse field experiments (2005)

Strachan, J. D., Alper, B., Corrigan, G., Erents, S. K., Giroud, C., Korotkov, A., ...

JET plasmas with reverse magnetic field feature a different SOL flow than those with normal field. The observed carbon fuelling efficiency from injecting methane gas was similar in reverse and normal...

Overview of transport, fast particle and heating and current drive physics using tritium in JET plasmas (2005)

Stork, D., Baranov, Y., Belo, P., Bertalot, L., Borba, D., Brzozowski, J. H., ...

Results are presented from the JET Trace Tritium Experimental (TTE) campaign using minority tritium (T) plasmas (n(T)/n(D) < 3%). Thermal tritium particle transport coefficients (D-T, nu(T)) are...

ELMS and strike point jumps (2005)

Solano, E. R., Jachmich, S., Villone, F., Hawkes, N., Corre, Y., Pitts, R. A., ...

If an ELM is a peeling of flux surfaces from the plasma, due to a broken separatrix, current density is lost as well as particles and energy. The fast loss of a current-carrying plasma layer modifies...

The effect of field reversal on the JET MkIIGB-SRP divertor performance in L-mode density limit discharges (2005)

Huber, A., Rapp, J., Andrew, P., Coad, P., Corrigan, G., Erents, K., ...

The effect of field reversal on the JET MkIIGB-SRP divertor performance has been investigated in L-mode density limit discharges. These experiments show that the direction of the magnetic field has a...

Tritium transport experiments on the JET tokamak (2004)

Zastrow, K. D., Adams, J. M., Baranov, Y., Belo, P., Bertalot, L., Brzozowski, J. H., ...

An overview is given of the experimental method, the analysis technique and the results for trace tritium experiments conducted on the JET tokamak in 2003. Observations associated with events such as...

Divertor modelling of septum assessment experiments in JET MkIIGB (2004)

Tsitrone, E., Andrew, P., Bonnin, X., Coad, P., Coster, D., Fundamenski, W., ...

We present results obtained from modeling the septum assessment experiments of the JET MkIIGB divertor with the B2-Eirene code package. Similar L-mode discharges have been performed with and without...

Towards the realization on JET of an integrated H-mode scenario for ITER (2004)

Ongena, J., Monier-Garbet, P., Suttrop, W., Andrew, P., Becoulet, M., Budny, R., ...

ELMy H-mode experiments at JET in 2000/mid-2002 have focused on discharges with normalized parameters for plasma density, energy confinement and beta similar to those of the ITER Q(DT) = 10 reference...

ELMy H-modes in JET helium-4 plasmas (2004)

McDonald, C., Cordey, J. G., Righi, E., Ryter, F., Saibene, G., Sartori, R., ...

ELMy H-modes in helium-4 plasmas provide valuable information on ELMy H-mode physics as well as a possible early low activation operational phase for next-step tokamaks, such as ITER. With this in...

LETTER Flux dependence of carbon chemical erosion by deuterium ions (2004)

J. Roth, R. Preuss, W. Bohmeyer, S. Brezinsek, A. Cambe, E. Casarotto, ...

The chemical erosion of carbon in interaction with a hydrogen plasma has been studied in detail in ion beam experiments, and erosion yield values are available as a function of ion energy and surface...

Impurity-seeded plasma experiments on JET (2003)

Maddison, G. P., Brix, M., Budny, R., Charlet, M., Coffey, I., Cordey, J. G., ...

Scaling to larger tokamaks of high confinement plasmas with radiating edges, induced by impurities, is being studied through internationally collaborative experiments on JET. In campaigns till the...

Thermal effects of surface layers on divertor target plates (2003)

Andrew, P., Coad, A., Eich, T., Gauthier, E., Herrmann, A., Matthews, G. F., ...

Measurement of the heat flux to the divertor by infrared thermography is complicated by processes at the surface leading to excess IR radiation. There are at least two possible causes of the excess...

Tomographic reconstruction of 2D line radiation distribution in the JET MkIIGB divertor (2003)

Huber, A., Coad, P., Coster, D., Ingesson, L. C., Itami, K., Jachmich, S., ...

A 2D-tomographic reconstruction of D- and C III-emission distribution in L-mode, density limit discharge has been performed and compared with results from other diagnostics (KL2, KS3). The observed...

Towards the realization on JET of an integrated H-mode scenario for ITER (2003)

Ongena, J., Monier-Garbet, P., Suttrop, W., Andrew, P., Bécoulet, M., Budny, R., ...

ELMy H-Mode experiments at JET since 2000 have focussed on the steady state and simultaneous realization of the ITER QDT=10 requirements in the normalized parameters for density, confinement and...

Parameter similarity studies in JET, ASDEX Upgrade and ALCATOR C-Mod (2003)

Suttrop, W. A., Horton, L. D., Hubbard, A. E., McDonald, D., Barnsley, R., Beurskens, M., ...

Similarity plasmas are studied in JET, ASDEX Upgrade and ALCATOR C-Mod to test the validity of dimensional constraints for core profiles and profiles at the plasma edge in H-modes with and without...

Deuterium to helium plasma-wall change-over experiments in the JET MkII-gas box divertor (2003)

Hillis, D. L., Loarer, T., Bucalossi, J., Pospieszczyk, A., Fundamenski, W., Matthews, G., ...

The deuterium and helium dynamics in the plasma and subdivertor regions of JET are compared during a sequence of similar ohmic and ICRH pulses where 100% He gas is injected into the JET vacuum...

First measurements on the core and edge isotope composition using the JET isotope separator neutral particle analyser (2003)

Bettella, D., Murari, A., Stamp, M., Testa, D.

Direct measurements of tokamak plasmas isotope composition are in general quite difficult and have therefore been very seldom performed. On the other hand, the importance of this measurement is going...

Confinement properties of high density impurity seeded ELMy H- mode discharges at low and high triangularity on JET (2002)

Dumortier, P., Andrew, P., Bonheure, G., Budny, R. V., Buttery, R., Charlet, M., ...

The design value for ITER is based on operation at n/n(GW) = 0.85, beta(n) = 1.8 and H98(y, 2) = 1. These values have been routinely achieved in JET in argon seeded ELMy H-mode discharges in...

Seeding of impurities in JET H-mode discharges to mitigate the impact of ELMs (2002)

Jachmich, S., Maddison, G., Beurskens, M. N. A., Dumortier, P., Eich, T., Messiaen, A., ...

ELMy H-mode is one of the foreseen operational scenarios for ITER-FEAT. Good confinement and density is usually associated with Type I ELMs, which, however, will have a severe impact on the divertor...

Scaling of the pedestal density in type-I ELMy H-mode discharges and the impact of upper and lower triangularity in JET and ASDEX Upgrade (2002)

Kallenbach, A., Beurskens, M.N.A., Korotkov, A., Lomas, P., Suttrop, W., Charlet, M., ...

Experiments have been performed to disentangle the individual role of tipper and lower triangularity on density buildup of lower single null, type-I ELMy H-mode discharges in JET. Comparison with...

Optimization of pellet scenarios for long pulse fuelling to high densities at JET (2002)

Lang, P. T., Alper, B., Baylor, L. R., Beurskens, M., Cordey, J. G., Dux, R., ...

Pellet injection was investigated for its fuelling capability to high densities in ELMy H mode discharges at JET. Applying the high field side launch system, optimized refuelling scenarios were...

High density operation at JET by pellet refuelling (2002)

Lang, P. T., Alper, B., Baylor, L. R., Beurskens, M., Cordey, J. G., Dux, R., ...

Several approaches are used at JET to achieve operation at high density with good energy confinement. One of them is the injection of solid fuel pellets to realize efficient particle refuelling by...

High density, high performance high-confinement-mode plasmas in the Joint European Torus (JET) (2002)

Suttrop, W., Ongena, J., Becoulet, M., Cordey, J. G., Dumortier, P., Huysmans, G. T. A., ...

Recent experiments at the Joint European Torus [Rebut , Fusion Eng. Des. 22, 7 (1993)] aim to improve confinement quality in high-confinement-mode (H-mode) plasmas at high densities. Energy...

Long timescale density peaking in JET (2002)

Valovic, M., Rapp, J., Cordey, J. G., Budny, R., McDonald, D. C., Garzotti, L., ...

Long timescale density peaking has been observed in JET plasmas leading to densities exceeding the Greenwald value. These neutral beam heated discharges are characterized by type-I ELMS and good...

High density, high performance high-confinement-mode plasmas in the Joint European Torus (JET) (2002)

Suttrop, W., Ongena, J., Becoulet, M., Cordey, J. G., Dumortier, P., Huysmans, G. T. A., ...

Recent experiments at the Joint European Torus [Rebut , Fusion Eng. Des. 22, 7 (1993)] aim to improve confinement quality in high-confinement-mode (H-mode) plasmas at high densities. Energy...

Error field locked modes thresholds in rotating plasmas, anomalous braking and spin-up (2002)

Lazzaro, E., Buttery, R. J., Hender, T. C., Zanca, P., Fitzpatrick, R., Bigi, M., ...

The mechanisms of nonlinear interaction of external helical fields with a rotating plasma are investigated analyzing the results of recent systematic experiments on the Joint European Torus (JET) [A....

Sawtooth, Neo-Classical Tearing Mode and Error Field Studies in JET (2002)

T.C. Hender, O. Sauter, B. Alper, C. Angioni, M. Baar, M. Benedetti, ...

A range of ITER relevant plasma stability issues have been studied in the JET tokamak; these include the effects of fast particles on sawteeth, control of NTMs via sawteeth seeds, scaling of (2,1)...

Recent progress on JET towards the ITER reference mode of operation at high density (2001)

Ongena, J., Suttrop, W., Becoulet, M., Cordey, G., Dumortier, P., Eich, T., ...

Recent progress towards obtaining high density and high confinement in JET as required for the ITER reference scenario at Q = 10 is summarized. Plasmas with simultaneous confinement H-98(y.2) = 1 and...

Overview of JET results in support of the ITER physics basis (2001)

Adams, J. M., Ageladarakis, P., Alper, B., Altmann, H., Arshad, S., Bainbridge, N., ...

The JET experimental campaign has focused on studies in support of the ITER physics basis. An overview of the results obtained is given for the reference ELMy H mode and advanced scenarios, which in...

D-T fusion with ion cyclotron resonance heating in the JET tokamak (1998)

Start, D. F. H., Jacquinot, J., Bergeaud, V., Bhatnagar, V. P., Cottrell, G. A., Clement, S., ...

Ion cyclotron resonance heating (ICRH) experiments have been carried out in JET D-T plasmas using scenarios applicable to reactors. Deuterium minority heating in tritium plasmas is used for the first...

High performance Joint European Torus (JET) plasmas for deuterium-tritium operation with the MkII divertor (1997)

Jones, T. T. C., Adams, J. M., Ageladarakis, P., AliArshad, S., Alper, B., Altmann, H., ...

Planned experiments in the Joint European Torus [Plasma Physics and Controlled Fusion Research, Proceedings, 13th International Conference, Washington, D.C., 1990 (International Atomic Energy Agency,...

Latest JET results in deuterium and deuterium-tritium plasmas (1997)

Adams, J. M., Ageladarakis, P., Arshad, S. A., Alper, B., Altmann, H., Andrew, P., ...

All major JET systems have been fully commissioned for D-T and the DTE1 series of experiments has started with the D-T fuel mixture and operating conditions foreseen for ITER. In the area of ITER...

JET results with the new pumped divertor and implications for ITER (1995)

Adams, J. M., Ageladarakis, P., Alper, B., Altmann, H., Andrew, P., AliArshad, S., ...

This paper presents an overview of results of the 1994/95 experimental campaign on JET with the new pumped divertor and draws implications for ITER in the areas of detached and radiative divertor...

First Results with the Modified Jet - the Jet Team (1994)

Adams, J. M., Agarici, Y., Ageladarakis, P., Alper, B., Altmann, H., Andrew, P., ...

JET was extensively modified in the 1992/93 shutdown. The new pumped divertor and many new systems were brought into operation early in 1994. Operations have progressed to 4MA plasma current and,...