http://tech.groups.yahoo.com/group/particledetector/ Counting Cosmic Particles from Space Sat, 30 Aug 2008 15:00:15 GMT Hannes Mayer http://tech.groups.yahoo.com/group/particledetector/message/601 http://tech.groups.yahoo.com/group/particledetector/message/601 Hi all, a new electronics store opened here and I was carefully checking it out today and found something: Regular CCFL high voltage modules, I previously Fri, 29 Aug 2008 23:01:21 GMT Hannes Mayer http://tech.groups.yahoo.com/group/particledetector/message/600 http://tech.groups.yahoo.com/group/particledetector/message/600 ... OK, folks that was a little too short-term. I want to ask you all, if there are actually folks around who want to make a voice telecon via skype ? If so, Fri, 29 Aug 2008 20:20:44 GMT Hannes Mayer http://tech.groups.yahoo.com/group/particledetector/message/599 http://tech.groups.yahoo.com/group/particledetector/message/599 Hi all, for all who want to participate in the first RADIATION SKYPE TELECON this evening STARTING AT 6pm EST, 3pm PST (that's a halfway acceptable time in Fri, 29 Aug 2008 18:07:28 GMT Hannes Mayer http://tech.groups.yahoo.com/group/particledetector/message/598 http://tech.groups.yahoo.com/group/particledetector/message/598 Very cool overview: http://cdsweb.cern.ch/record/1092437/files/CERN-Brochure-2008-001-Eng.pdf Cheers, Hannes. -- Fri, 29 Aug 2008 16:04:51 GMT Hannes Mayer http://tech.groups.yahoo.com/group/particledetector/message/597 http://tech.groups.yahoo.com/group/particledetector/message/597 ... At least not with a GM tube. Using a scintillator, you can measure energy and then check if it's a muon or not. That's when I'm going to try, when I have Fri, 29 Aug 2008 15:34:25 GMT Ronald Fleshman http://tech.groups.yahoo.com/group/particledetector/message/596 http://tech.groups.yahoo.com/group/particledetector/message/596 Rodney, Check your shielding material with a counter before you use it, many materials are slightly radioactive themselves. Almost all rock contains traces of Fri, 29 Aug 2008 11:06:17 GMT Hannes Mayer http://tech.groups.yahoo.com/group/particledetector/message/595 http://tech.groups.yahoo.com/group/particledetector/message/595 ... Hi Rodney, see: http://www.cosmicrays.org/muon-geant4.php http://www.cosmicrays.org/muon-geant4-simulation.php Cheers, Hannes. -- Fri, 29 Aug 2008 11:04:39 GMT alexandra saftoiu http://tech.groups.yahoo.com/group/particledetector/message/594 http://tech.groups.yahoo.com/group/particledetector/message/594 Hi Rodney, I don't know if I got your idea exactly. So you have a torus magnet and you place it under the Geiger counter, ok. I have some comments: the Fri, 29 Aug 2008 01:01:42 GMT Rodney Howe http://tech.groups.yahoo.com/group/particledetector/message/593 http://tech.groups.yahoo.com/group/particledetector/message/593 Alexandra, I'm experimenting with shielding as you suggested. I also do some radio astronomy, and was fortunate enough to get hold of a MODIS satellite Sun, 24 Aug 2008 13:25:03 GMT Hannes Mayer http://tech.groups.yahoo.com/group/particledetector/message/592 http://tech.groups.yahoo.com/group/particledetector/message/592 http://www.iop.org/EJ/journal/-page=extra.lhc/jinst Enjoy! Cari saluti, Capitano. -- +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+ ... Sun, 17 Aug 2008 10:29:20 GMT alexandra saftoiu http://tech.groups.yahoo.com/group/particledetector/message/591 http://tech.groups.yahoo.com/group/particledetector/message/591 Hi Rodney, I am not sure I got your idea with the V-shape shielding, but I guess that before you try any specific shape try a simple planar shielding above Sat, 16 Aug 2008 16:54:55 GMT Rodney Howe http://tech.groups.yahoo.com/group/particledetector/message/590 http://tech.groups.yahoo.com/group/particledetector/message/590 Alexandra, Thanks' for the reply, I think some kind of lead shielding might be best, perhaps a V shape to shield just the ground: \*/ ( where the * is Wed, 13 Aug 2008 05:24:34 GMT fanman http://tech.groups.yahoo.com/group/particledetector/message/589 http://tech.groups.yahoo.com/group/particledetector/message/589 Hi Hannes, The design of light guides (also called light pipes) is a science in and of itself. You have seen many examples of them in consumer electronics, Tue, 12 Aug 2008 19:24:53 GMT Hannes Mayer http://tech.groups.yahoo.com/group/particledetector/message/588 http://tech.groups.yahoo.com/group/particledetector/message/588 Hi all, recently I bought a neat PMT http://www.cosmicrays.org/tmp/pmt1.jpg (bought from GEOelectronics http://search.ebay.com/_W0QQsassZgeoelectronics highly Tue, 12 Aug 2008 14:51:15 GMT Alexandra Saftoiu http://tech.groups.yahoo.com/group/particledetector/message/587 http://tech.groups.yahoo.com/group/particledetector/message/587 Hi Rodney, yes, I think that's what you need to sort out, what the background noise is and/or design some of shielding, like for example a 10 cm lead