| 00:00:00 | Introduction |
| 00:01:07 | Overview |
| 00:02:07 | One small step… |
| 00:02:56 | The wonder of science |
| 00:03:39 | Obligatory opening quotation |
| 00:04:18 | Why? |
| 00:05:09 | “Dust is the number one concern in returning to the moon” |
| 00:05:45 | Lunar ‘Dust’ http://www.hq.nasa.gov/alsj/TM-2005-213610.pdf |
| 00:07:01 | Space – the final frontier |
| 00:07:48 | What is regolith? |
| 00:09:13 | Lunar regolith – what’s different from the perspective of a particle |
| 00:10:42 | The real thing |
| 00:12:30 | Size range of lunar regolith and simulant http://www.lpi.usra.edu/lunar/strategies/jsc_lunar_simulant.pdf |
| 00:13:30 | Lunar Simulant Why? |
| 00:15:43 | The Regolith Challenge |
| 00:17:28 | http://thelaunchpad.xprize.org/2009_10_18_archive.html |
| 00:18:04 | http://isru.msfc.nasa.gov/lib/Documents/Simulant-listing.pdf |
| 00:19:40 | Anorthosite on the lunar surface |
| 00:19:54 | Care! |
| 00:21:13 | NU-LHT-1M |
| 00:22:08 | USGS/NASA lunar regolith simulant |
| 00:22:52 | Consider the difficulty of the issues… |
| 00:24:07 | Abrasion – the real final frontier… |
| 00:24:46 | Abrasion |
| 00:26:01 | Wm. Mackie ”On the laws that govern the rounding of grains of sand” Transactions of the Edinburgh Geological Society 7(3), 298-311, (1897) April 28th 1856 - July 15th 1932 Place of Birth: Loanends of Durno, Chapel of Garioch, Aberdeenshire |
| 00:27:06 | Chester K Wentworth – 1919 A laboratory and field study of cobble abrasion |
| 00:28:06 | Chester Wentworth – 1919 A laboratory and field study of cobble abrasion |
| 00:28:45 | Chester Wentworth – 1919 (May 7th, 1891 – January 1969) A laboratory and field study of cobble abrasion |
| 00:29:27 | Wentworth – 1922 Early use of scattergrams? |
| 00:30:05 | Shapometer Allen C Tester Science, 1931 |
| 00:31:13 | R Dana Russell & Ralph E Taylor 1937 – Mississippi River Sands |
| 00:32:20 | Krumbein, 1941 |
| 00:33:13 | Krumbein, 1941 |
| 00:33:42 | Krumbein, 1941 |
| 00:34:37 | Krumbein, 1941 |
| 00:35:45 | Krumbein, 1938 Surface texture, S |
| 00:36:38 | W C Krumbein & F J Pettijohn Manual of Sedimentary Petrography (1938) Chapter 12 “Surface textures of sedimentary fragments and particles” pp 303-308 5½ pages only Chapter 11 is “Shape and Roundness” (recommended for history) |
| 00:37:21 | W C Krumbein & F J Pettijohn Manual of Sedimentary Petrography (1938) Chapter 12 “Surface textures of sedimentary fragments and particles” |
| 00:38:01 | Quick shape |
| 00:38:49 | Wadell |
| 00:39:11 | Wadell – from Krumbein/Pettijohn |
| 00:40:16 | Harold Heywood |
| 00:40:45 | Heywood Factor |
| 00:42:14 | ISO 9276-6: 2008 Representation of results of particle size analysis -- Part 6: Descriptive and quantitative representation of particle shape and morphology |
| 00:43:18 | ISO13322-x |
| 00:43:40 | Shape – the real thing? Based on definition and resolution |
| 00:44:54 | The size distribution - wet and dry See: http://isru.msfc.nasa.gov/lib/Documents/particlesize/LHT-1M/Malvern/Size/LHT-1Msize_Malvern2102_Report.pdf |
| 00:45:57 | Minimum Mass (based on Gy statistics) |
| 00:47:01 | Best Fundamental Sampling Error (FSE) |
| 00:48:44 | Number distribution |
| 00:49:21 | The shape distribution |
| 00:50:03 | Eric Pirard Personal communication October 5th, 2010 06:21 AM |
| 00:50:53 | Shape distribution |
| 00:51:34 | Pictures – 103 (or 1E3) words? NU-LHT-1M (Batch 26) |
| 00:52:11 | Pictures – 103 (or 1E3) words? NU-LHT-1M (Batch 121; 75 – 300mm fraction) |
| 00:52:53 | Fines fraction – 4 bar dispersion |
| 00:53:09 | Figures of Merit for simulant |
| 00:53:46 | ISO standard |
| 00:53:56 | One example – particle size |
| 00:54:28 | Standardization ISO/CD 10788 Space systems -- Lunar dust simulant From: ISO TC 20/SC 14 Space Systems and Operations Standardization |
| 00:54:41 | From the draft… |
| 00:54:53 | Summary |
| 00:55:56 | Acknowledgments and thank you |
In this webinar we'll consider the background to the manufacture of the NASA/USGS lunar simulant NU-LHT-1M and the characterization of this material by the Malvern Mastersizer 2000 and Morphologi G3 instruments.