Fwd: [AIRAPT] Re: IPPS Workshops at AIRAPT 2023

[Altair Soria Pereira]

-------- Mensagem original --------

Assunto:	[AIRAPT] Re: IPPS Workshops at AIRAPT 2023
Data:	2023-03-24 01:05
De:	Giuseppe Angilella <Giuseppe....@ct.infn.it>
Para:	mem...@airapt.org, meg...@ehprg.org, pastm...@airapt.org
Cópia:
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On Fri, 24 Mar 2023, Yanbin Wang wrote:

Dear Giuseppe,

Could you please help us pass around the announcement below to our AIRAPT members, please?

Thank you very much!

Yanbin
____________________________________________________

Members of the International Practical Pressure Scale (IPPS) and the general AIRAPT membership,

At the 2017 AIRAPT meeting in Beijing the IPPS was founded.  At the 2019 meeting in Rio de Janeiro a workshop was held to discuss developing a widely-accepted ruby pressure scale.  The 2019 workshop led to a new calibration standard, “Toward an international practical pressure scale: A proposal for an IPPS ruby gauge (IPPS-Ruby2020)”, https://doi.org/10.1080/08957959.2020.1791107.

We are planning on holding two similar workshops with the IPPS at the 2023 AIRAPT meeting in Edinburgh, “Pressure reference points for multi-anvil systems”, and “Equations of State from 100 GPa to TPa pressures”.  Descriptions of the workshops follow, please note that these workshops will be scheduled for the Sunday preceding the main meeting, so be sure to arrive for the meeting on Saturday if you plan to participate.  Attendance at the workshops is not limited to members of the IPPS Task Group, and if you are not currently a member of the IPPS Task Group but would like to be considered, please send an email to the chair of the IPPS Task Group, Yanbin Wang ywa...@uchicago.edu.

Workshop descriptions:

Pressure reference points for multi-anvil systems (Sunday, July 23, 14:00-17:00)

This workshop will develop a scheme to recalibrate room-temperature pressure reference points (PRPs) commonly used in the multi-anvil (MA) community against the new ruby scale (Ruby2020) that was recently recommended by AIRAPT to the diamond-anvil cell (DAC) community, https://doi.org/10.1080/08957959.2020.1791107. We believe that some connections linking the commonly used pressure scales will help reduce reported pressure discrepancies between the two communities. Room-temperature PRPs are usually a starting point for high-temperature pressure calibrations. More general PRPs would be for high temperatures. However, room-temperature PRPs are first necessary step towards establishing internally consistent high-temperature pressure standards across the MA and DAC communities. This workshop will serve as a starting point for discussion and comment. We hope to discuss and settle on a final scheme we all agree on.

Equations of State from 100 GPa to TPa pressures (Sunday, July 23, 10:00-13:00)

This workshop will define and begin a large collaborative project to identify several metals, e.g. Au, Pt, Cu, Fe, Sn, Ta, etc. where accurate P, V, T measurements exist using static, Hugoniot, and ramp-compression techniques with absolute pressure-density measurements or direct cross comparisons between several metals at identical thermodynamic conditions.  The experimental community will then discuss and agree upon a set of rigorous uncertainties for all of the measurements.  The EOS table-building community (LLNL, LANL, CEA, AWE, etc.) would then take this set of experimental data and develop independent, thermodynamically-consistent EOS tables guided as much as possible by agreement with the experimental data and its uncertainties, and relying as little as possible on simulations. The P, rho, T extent of the tables would concentrate on being interpolative rather than extrapolative and thus limited from 0-2 TPa and 300-20,000 K, mostly within the HED regime.  The resulting tables would then be compared across the table-building community and an attempt would be made to identify a set of consensus experimentally-based tables that all parties could agree to.  AIRAPT, through the IPPS, could endorse this set of EOS tables which would be made available to serve as a collection of thermodynamically- consistent, experimentally-validated, widely-accepted calibrations that the we can all use. At this workshop we will identify a reasonable set of materials and reasonable goals, form experimental and table-building teams, and agree on a plan to achieve our goals.

Best regards,

Yanbin Wang, Kurt Leinenweber, Guoyin Shen, Jon Eggert