Hi all! I just announced this group on other 'related' groups and some new members already joined! Welcome aboard! :-) Today I started with the high voltage...
Hi Guys I'm John Murray from Bristol, UK. I'm halfway through building my muon telescope. The power supply unit is complete. The first of the (four) ...
John Murray
whatsupdoc@...
Jan 3, 2004 12:53 pm
12
Hello, Through the computer club at my school I'm involved in the quarknet project (quarknet.fnal.gov) and have been directing those in the comupter club to...
Greetings from the beatiful Bitterroot Valley of western Montana (46N/114W, 4200'). I have two Aware Electronics RM-70s on order for the heart of my muon...
Hi John, I have your BRG program and have been using it connected to a CD V-700 GM counter (necessary to reverse polarity of audio signal to get the pulse in...
Hi Dusty... Just import the files into Excel. The RAD file gives count per minute for each minute recorded, The RAN file logs each event separately with the...
John Murray
whatsupdoc@...
Jan 4, 2004 1:06 am
17
Hannes! Congratullations: I love this topic! How about the New Year? Best regards, Jorge Dewey...
Hannes and Forum, I have some scintillation Xtals (sodium iodide), plus photomultiplier tubes, plus preamplifiers. All you have to do is to add a power supply...
John et al, I would really appreciate pointers to where to buy a pair of GM tubes at a good price. Esp. ones suited for this activity. Thanks, Eric Vogel ... ...
Hi Eric Well, I'm no expert, but I get mine from eBay. Mostly they are ex RAF items called 'Trainers' and usually sell for about £9.00 ($13.00?). I strip...
John Murray
whatsupdoc@...
Jan 4, 2004 12:17 pm
21
Hi all! Last year in summer when I was thinking about which detector I should build I also considered useing commercial GM tubes, but then decided to build my...
John Strong had a chapter on Geiger counters in his Procedures in Experimental Physics. One of the homemade tubes was 6" in diameter by about 4 ft long. The...
Try e-Bay under "Geiger Counter". A CD V-700 is a Geiger Counter. Other CDs such as V-715 and V-717 are ion chamber types and not useful for muon detection...
... I have experimented with GM detectors and written on them a bit in the SAS (Society of Amateur Scientists founded by Shawn) E-Bulletin. Here are a few...
Joseph DiVerdi
diverdi@...
Jan 4, 2004 7:12 pm
26
Thanks for the pointers to your updates Joe. Seems like it should be possble to come up with something that's more metal/less polymer and still simple and...
... Hi Joseph! Welcome aboard!!! Now that is cool! Thanks a lot for the links and sharing first hand information on the topic! :-D Regarding the "glue" to put...
... Any old gas will work in a detector such as this. However, there are consequences... in particular, the ionization energy (IE) of the gas has a profound...
Joseph DiVerdi
diverdi@...
Jan 5, 2004 1:25 am
29
... Dear Steve, You're welcome. There are many other configurations. I'm just a simple linear thinker without much imagination. :) It sounds like you're...
Joseph DiVerdi
diverdi@...
Jan 5, 2004 1:28 am
30
Joseph, Not on topic but to your question, spiral TLTs aren't especially big but they are a good way to achieve voltage multiplication and get a very short...
Hi Joseph! Thanks a lot for the detailed explanations!!! ... What do you exactly mean by 'troublesome' ? ... Do you mean that the vaccuum was vanishing...
Dear Hannes, ... You're welcome. ... Sorry for the obscure thought. I mean that they will not work well as GM detectors. ... Absolutely. It was driving me...
Joseph DiVerdi
diverdi@...
Jan 6, 2004 4:21 pm
33
Hi Joseph, When I read your suggestion on using old refrigerator compressors as a vacuum source, I could not help remember, how over 40 years ago, I used them...
Hi Joseph! ... Hmmm... that is not good news... The high voltage supply I'm currently building is capable of producing up to 3kV DC. Would that higher voltage...
... Hi Raul! Thank you for the reminder on the fridge pump! I think I will simply get an old pump from a junk yard, instead of spending 150 bucks on the pump...
The more common refrig pump found at the dump is the piston style which will achieve a modest vacuum of 50 Torr or so. The better style (but a bit harder to...
... Hi Hannes, Steve covered your question well. I will just add that look for one still under pressure (Freon). If you are really into the environment, have...
I started out with refrig compressors when I was a kid (always wanted a Norge Rollator as described in Frank Lee's booklet) but in spite of searching high and...
I just joined recently. Would a detector be useful for this, done with a pair of commercial GM tubes, and a coincidence detector? I can easily do code in an...
