Charlie Thompson's
Buda
Seismic Observatory
Radiation Detection
Web Page
Updated
11/30/2006
My Usage Policy:
1.
The ideas presented herein were not intended for radiation safety and
health.
If you are working around
hazardous materials please get a certified
and calibrated
survey meter.
2.
If you use or reproduce my schematic(s) please give the author (me)
credit...thanks!
A low ripple regulated PMT supply using a CCFL inverter
David Prutchi's Nifty web site on radiation detectors, etc
Convert
your CDV-700 models 6 and 6A for scintillation probe operation
A voltage
doubler mod for your CDV700 HV circuit - for use with higher voltage
photomulitpliers
NEW!.....A
most excellent primer on Radiation and Radiation Safety from UCSC
Radiation
Quantities and Units
Registry
of Sealed Radioactive Sources
Civil
Defense Museum
The Farnsworth Chronicles (Philo the fusor)
Charlie's
Paint Can Scintillator (click here for plans)
Charlie's Pepperidge Farm Scintillator
XP2102 2" Photomulitiplier from CTR Surplus Hookup Diagram (.GIF)
Hookup diagram for XP3392/SP4 Photomultiplier
Scintillation Probe Hookup Diagram for R1307-10 3" Photomulitplier from CTR Surplus (.GIF)
Scintillation Probe Hookup Diagram for R1538 Photomulitplier from CTR Surplus (.PDF file)
Hookup Diagram for the Hamamatsu R878-01 Photomultiplier from CTR Surplus (.PDF file)
Hookup Diagram for Hammatsu R3318-02 (with rear cover and preamp removed) available from CTR Surplus
Finding Fossils with a Scintillator
Also check out the H.O. Anger Gamma Camera Patent from 1958 US Pat# 3,011,057
Hamamatsu Photomultiplier Catalog
The famous 176 page BURLE (RCA) Photomulitplier Handbook (.PDF file)
Tips on photomultiplier useage (.PDF file)
Eljen, Inc. scintillator plastics and liquids
Interactive Table of the Nuclides (identify your isotopes!)
Measuring HV without excessive circuit loading:
A low-cost 100Meg HV
probe adapter for your DVM
Maintenance Manual for Victoreen CDV-700 Model 6, 6A (even pages) .PDF format
Maintenance Manual for Victoreen CDV-700 Model 6, 6A (odd pages) .PDF format
Maintenance and Ops Manual for Victoreen CDV-700 Model 6B
No Headphones for your Victoreen CDV-700?...check out this piezo speaker retrofit
Maintenance-Ops
Manual for Victoreen CDV-715 Survey Meter
NOTE- The
CDV-715 is NOT a geiger counter. It does not have a geiger
tube. It
uses an ionization chamber in non-geiger mode.
It is about 1000 times LESS sensitive than a geiger counter.
These units are being listed on eBay as geiger counters which is
a mis-nomer.
If you can't get your CDV715 needle to move try a
post-nuclear blast environment.
If it does
move...you are in a dangerous radiation field!
Precision
Model 111b Scintillator schematic
I will pay you $15 cash for
your old dead yellow 111b scintillator crystal...email me.
A tip on measuring your 111b HV: The
voltage across R2 multiplied by 2641 will be your HV value.
You can measure this with a 10 Meg DVM with minimal
error because R2 is 100K ohms. This value
is
typically about 0.400 volts so it's fairly safe as well!
NEW! A Bar-Graph Geiger Counter by Russell Clift
NEW! Amateur Radiation Detection and Experimentation Page
NEW! Aware Electronics - PC-based Geiger Counters
More to come...when I get around to it!
email:
xcdt2x@austin.rr.com
(nix the
anti-spam x's)
