D correlations in photoproduction

Alvarez, M.; Barate, R.; Blöch, D.; Bonamy, P.; Borgeaud, P.; Burchell, M. J.; Burmeister, H.; Brunet, J. M.; Calviño, F.; Cattaneo, M.; Crespo, J.M.; Dalmagne, B.; David, M.; Ciaccio, L. Di; Dixon, John; Druet, P.; Duane, A.; Engel, J. P.; Ferrer, A.; Filippas, T. A.; Fokitis, E.; Forty, R.; Foucault, P.; Gazis, E. N.; Gerber, J.; Giomataris, Y.; Hofmokl, T.; Katsoufis, E.; Koratzinos, M.; Krafft, C.; Lefièvre, B.; Lemoigne, Y.; López, A.; Lui, Wei; Magneville, C.; Maltezos, A.; McEwen, J.G.; Papadopoulou, Th. D.; Pattison, B.; Poutot, D.; Primout, M.; Rahmani, H.; Roudeau, P.; Seez, C.; Six, J.; Strub, R.; Treille, D.; Triscos, P.; Tristram, G.; Villet, G.; Volte, A.; Wayne, M.; Websdale, D.; Wormser, G.; Zolnierowski, Y.

doi:10.1016/0370-2693(92)90212-m

Cited by 12 publications

(5 citation statements)

References 12 publications

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“…[22][23][24] The SiO 2 end of SP probe have the effective MFP on the order of  SiO2 ≈ 10 nm and 50 nm probe end and therefore Knudsen number for heat transfer Kn ≈ 0.2. As described in, 25 the thermal conductivity in the transition diffusion-ballistic regime k db can be with good approximation estimated as the decrease of the effective heat conductivity k, with…”

Section: A Multi-scale Modelling Of Nanoscale Thermal Probesmentioning

confidence: 99%

“…Clearly, for insulating single crystalline materials of very high thermal conductivity, such as diamond, Si, sapphire and graphene layers the heat transport on the material side is ballistic in the vicinity of the ~50 nm contact area, and in this case, the appropriate consideration of modification of thermal resistance as per 22,24,25 using equations (2) and (3) and our SThM measurements will generally provide lower values of thermal conductivity with the factor of 1/(π Kn).…”

Section: A Multi-scale Modelling Of Nanoscale Thermal Probesmentioning

confidence: 99%

“…We address the effects of mesoscopic size in the nanoscale thermal probe below, based on the analysis of the transition regime between ballistic and diffusive thermal transport as detailed elsewhere. [23][24][25] While SThM was used to study CNT's thermal conductivity, 6,26 few groups have experimental or modelling exploration of these systems.…”

Section: Introductionmentioning

confidence: 99%

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Nanoscale spatial resolution probes for scanning thermal microscopy of solid state materials

Tovee

Pumarol

Zeze

et al. 2012

Journal of Applied Physics

143

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Scanning Thermal Microscopy (SThM) uses micromachined thermal sensors integrated in a force sensing cantilever with a nanoscale tip can be highly useful for exploration of thermal management of nanoscale semiconductor devices. As well as mapping of surface and subsurface properties of related materials. Whereas SThM is capable to image externally generated heat with nanoscale resolution, its ability to map and measure thermal conductivity of materials has been mainly limited to polymers or similar materials possessing low thermal conductivity in the range from 0.1 to 1 Wm -1 K -1 , with lateral resolution on the order of 1 µm.In this paper we use linked experimental and theoretical approaches to analyse thermal performance and sensitivity of the micromachined SThM probes in order to expand their applicability to a broader range of nanostructures from polymers to semiconductors and metals. We develop physical models of interlinked thermal and electrical phenomena in these probes and their interaction with the sample on the mesoscopic length scale of few tens of nm and then validate these models using experimental measurements of the real probes, which provided the basis for analysing SThM performance in exploration of nanostructures. Our study then highlights critical features of these probes, namely, the geometrical location of the thermal sensor with respect to the probe apex, thermal conductance of the probe to the support base, heat conduction to the surrounding gas, and the thermal conductivity of tip material adjacent to the apex. It is furthermore allows us to propose a novel design of the SThM probe that incorporates a multiwall carbon nanotube (CNT) or similar high thermal conductivity graphene sheet material with longitudinal dimensions on micrometre length scale positioned near the probe apex that can provide contact areas with the sample on the order of few tens of nm. The new sensor is predicted to provide greatly improved spatial resolution to thermal properties of nanostructures, as well as to expand the sensitivity of the SThM probe to materials with heat conductivity values up to 100-1000 Wm -1 K -1 .

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Section: A Multi-scale Modelling Of Nanoscale Thermal Probesmentioning

confidence: 99%

Section: A Multi-scale Modelling Of Nanoscale Thermal Probesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nanoscale spatial resolution probes for scanning thermal microscopy of solid state materials

Tovee

Pumarol

Zeze

et al. 2012

Journal of Applied Physics

143

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“…The H1 collaboration at HERA has measured very recently such correlations [7]. Very similar analysis was performed in the past also for open charm production at somewhat lower energies [8]. Recently the FOCUS collaboration at Fermilab provided new precise data for charm-anticharm correlations [9].…”

mentioning

confidence: 99%

“…With the simple Ansatz (8) for F N P g the whole scale µ 2 dependence resides exclusively in the Sudakov-like form factor. For brevity, we shall call the gluon distribution in Eq.…”

mentioning

confidence: 99%

Charm quark–antiquark correlations in photon–proton scattering

Łuszczak

Szczurek

2004

Physics Letters B

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Correlation of charm quark -charm antiquark in γp scattering are calculated in the k t -factorization approach. We apply different unintegrated gluon distributions (uGDF) used in the literature. The results of our calculations are compared with very recent experimental results from the FOCUS collaboration. The CCFM uGDF developed recently by Kwieciński et al. gives a good description of the data. New observables are suggested for future studies. Predictions and perspectives for the HERA energies are presented.

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Hadroproduction and photoproduction of beauty and charm in fixed-target experiments

Slaughter

1996

Nuov Cim A

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D correlations in photoproduction

Cited by 12 publications

References 12 publications

Nanoscale spatial resolution probes for scanning thermal microscopy of solid state materials

Nanoscale spatial resolution probes for scanning thermal microscopy of solid state materials

Charm quark–antiquark correlations in photon–proton scattering

Hadroproduction and photoproduction of beauty and charm in fixed-target experiments

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