Determination of the stochastic layer properties induced by magnetic perturbations via heat pulse experiments at ASDEX upgrade

We present the simple map for a single-null divertor tokamak. The simple map is an area-preserving map based on the idea that magnetic field lines are a single-degree- of-freedom time-dependent Hamiltonian system, and that the basic features of such systems near the X-point are generic. We obtain the properties of this map and the resulting footprints of field lines on the divertor plate. These include the width of the stochastic layer, the edge safety factor, the area of the footprint and the amount of magnetic flux diverted. We give the safety factor profile, the average and median values of strike angles, lengths and the Liapunov exponents. We describe how the effects of magnetic perturbations can be included in the simple map. We show how the map can be applied to the problem of the determination of heat flux on the divertor plate in tokamaks.

Download Full-text

A heat pulse technique for the determination of small-scale flow directions and flow velocities in the streambed of sand-bed streams

Hydrological Processes ◽

10.1002/hyp.8062 ◽

2011 ◽

Vol 25 (20) ◽

pp. 3244-3255 ◽

Cited By ~ 49

Author(s):

Jörg Lewandowski ◽

Lisa Angermann ◽

Gunnar Nützmann ◽

Jan H. Fleckenstein

Keyword(s):

Heat Pulse ◽

Small Scale ◽

Pulse Technique ◽

Flow Directions ◽

Flow Velocities

Download Full-text

Simultaneous determination of soil bulk density and water content: a heat pulse-based method

European Journal of Soil Science ◽

10.1111/ejss.12690 ◽

2018 ◽

Vol 69 (5) ◽

pp. 947-952 ◽

Cited By ~ 4

Author(s):

Y. Lu ◽

R. Horton ◽

T. Ren

Keyword(s):

Water Content ◽

Bulk Density ◽

Simultaneous Determination ◽

Soil Bulk Density ◽

Heat Pulse

Download Full-text

Determination of the liquidus temperature of tin using the heat pulse-based melting and comparison with traditional methods

Metrologia ◽

10.1088/1681-7575/aa9c8a ◽

2018 ◽

Vol 55 (3) ◽

pp. 334-349 ◽

Cited By ~ 5

Author(s):

Wukchul Joung ◽

Jihye Park ◽

Jonathan V Pearce

Keyword(s):

Liquidus Temperature ◽

Heat Pulse ◽

Traditional Methods

Download Full-text

Inverse method for simultaneous determination of soil water flux density and thermal properties with a penta-needle heat pulse probe

Water Resources Research ◽

10.1002/wrcr.20459 ◽

2013 ◽

Vol 49 (9) ◽

pp. 5851-5864 ◽

Cited By ~ 14

Author(s):

Changbing Yang ◽

Masaru Sakai ◽

Scott B. Jones

Keyword(s):

Thermal Properties ◽

Soil Water ◽

Simultaneous Determination ◽

Flux Density ◽

Inverse Method ◽

Water Flux ◽

Heat Pulse ◽

Pulse Probe ◽

Soil Water Flux

Download Full-text

Determination of transpiration in irrigated grapevines: comparison of the heat-pulse technique with gravimetric and micrometeorological methods

Irrigation Science ◽

10.1007/pl00006714 ◽

2000 ◽

Vol 20 (1) ◽

pp. 1-8 ◽

Cited By ~ 33

Author(s):

I. A. M. Yunusa ◽

R. R. Walker ◽

B. R. Loveys ◽

D. H. Blackmore

Keyword(s):

Heat Pulse ◽

Pulse Technique

Download Full-text

Determination of Optimal Rapid Thermal Annealing Exposure Time and Pulse Rising Rate for Minimum Impurity Redistribution

MRS Proceedings ◽

10.1557/proc-45-361 ◽

1985 ◽

Vol 45 ◽

Cited By ~ 1

Author(s):

Carlos A. Paz de Araujo ◽

Tang Ting-Ao

Keyword(s):

Thermal Annealing ◽

Rapid Thermal Annealing ◽

Exposure Time ◽

First Principles ◽

Heat Pulse ◽

High Dose ◽

Simple Relationship ◽

Sims Analysis ◽

Good Agreement

ABSTRACTA simple relationship for rapid thermal annealing exposure time for the case of annealing of boron and arsenic high dose shallow implants is found from first principles. The percentage of redistribution is found to be intrinsically dependent on exposure time and rate of temperature rise in the heat pulse. An upper bound of pulse rising rate for a given percentage tolerance in redistribution is also found. Extensive SIMS analysis shows very good agreement of these formulae with experimental data.

Download Full-text